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mw-ui-icon-wikimedia-expand"></span> <span>Toggle Predecessors – Boer War and the Great War subsection</span> </button> <ul id="toc-Predecessors_–_Boer_War_and_the_Great_War-sublist" class="vector-toc-list"> <li id="toc-QF_1_pounder" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#QF_1_pounder"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>QF 1 pounder</span> </div> </a> <ul id="toc-QF_1_pounder-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-QF_1+1⁄2-pounder" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#QF_1+1⁄2-pounder"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>QF <span>1<span>+</span><span>1</span>⁄<span>2</span></span>-pounder</span> </div> </a> <ul id="toc-QF_1+1⁄2-pounder-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-QF_2-pounder_Mark_II" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#QF_2-pounder_Mark_II"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>QF 2-pounder Mark II</span> </div> </a> <ul id="toc-QF_2-pounder_Mark_II-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-QF_2-pounder_Mark_VIII" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#QF_2-pounder_Mark_VIII"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>QF 2-pounder Mark VIII</span> </div> </a> <ul id="toc-QF_2-pounder_Mark_VIII-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-US_Navy" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#US_Navy"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>US Navy</span> </div> </a> <ul id="toc-US_Navy-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Wartime_use" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Wartime_use"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Wartime use</span> </div> </a> <ul id="toc-Wartime_use-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-QF_2-pounder_Mark_XIV" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#QF_2-pounder_Mark_XIV"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>QF 2-pounder Mark XIV</span> </div> </a> <ul id="toc-QF_2-pounder_Mark_XIV-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ammunition" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ammunition"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Ammunition</span> </div> </a> <ul id="toc-Ammunition-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliography" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliography"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Bibliography</span> </div> </a> <ul id="toc-Bibliography-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" 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type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 12 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-12" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">12 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/Vickers_QF_2_pounder_Mark_II" title="Vickers QF 2 pounder Mark II – Bulgarian" lang="bg" hreflang="bg" data-title="Vickers QF 2 pounder Mark II" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Can%C3%B3_naval_QF_de_2_lliures" title="Canó naval QF de 2 lliures – Catalan" lang="ca" hreflang="ca" data-title="Canó naval QF de 2 lliures" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/QF_2-Pf%C3%BCnder-Marinegesch%C3%BCtz" title="QF 2-Pfünder-Marinegeschütz – German" lang="de" hreflang="de" data-title="QF 2-Pfünder-Marinegeschütz" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Ca%C3%B1%C3%B3n_naval_QF_de_2_libras" title="Cañón naval QF de 2 libras – Spanish" lang="es" hreflang="es" data-title="Cañón naval QF de 2 libras" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Canon_de_marine_de_2_livres_QF" title="Canon de marine de 2 livres QF – French" lang="fr" hreflang="fr" data-title="Canon de marine de 2 livres QF" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Meriam_laut_QF_2-pounder" title="Meriam laut QF 2-pounder – Indonesian" lang="id" hreflang="id" data-title="Meriam laut QF 2-pounder" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Vickers-Armstrong_QF_2_lb" title="Vickers-Armstrong QF 2 lb – Italian" lang="it" hreflang="it" data-title="Vickers-Armstrong QF 2 lb" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%B4%E3%82%A3%E3%83%83%E3%82%AB%E3%83%BC%E3%82%B9_QF_2%E3%83%9D%E3%83%B3%E3%83%89%E7%A0%B2" title="ヴィッカース QF 2ポンド砲 – Japanese" lang="ja" hreflang="ja" data-title="ヴィッカース QF 2ポンド砲" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Armata_przeciwlotnicza_40_mm_Mark_II" title="Armata przeciwlotnicza 40 mm Mark II – Polish" lang="pl" hreflang="pl" data-title="Armata przeciwlotnicza 40 mm Mark II" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/40-%D0%BC%D0%BC_%D0%BF%D1%83%D1%88%D0%BA%D0%B0_%D0%92%D0%B8%D0%BA%D0%BA%D0%B5%D1%80%D1%81_%D0%9C%D0%BA_2" title="40-мм пушка Виккерс Мк 2 – Russian" lang="ru" hreflang="ru" data-title="40-мм пушка Виккерс Мк 2" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/40-%D0%BC%D0%BC_%D0%BA%D0%BE%D1%80%D0%B0%D0%B1%D0%B5%D0%BB%D1%8C%D0%BD%D0%B0_%D0%B3%D0%B0%D1%80%D0%BC%D0%B0%D1%82%D0%B0_Vickers_QF_2_pounder_Mark_II" title="40-мм корабельна гармата Vickers QF 2 pounder Mark II – Ukrainian" lang="uk" hreflang="uk" data-title="40-мм корабельна гармата Vickers QF 2 pounder Mark II" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/QF_2%E7%A3%85%E9%80%9F%E5%B0%84%E8%89%A6%E7%82%AE" title="QF 2磅速射艦炮 – Chinese" lang="zh" hreflang="zh" data-title="QF 2磅速射艦炮" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q2297890#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul 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.hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">This article is about the anti-aircraft autocannon. For the World War II anti-tank gun, see <a href="/wiki/Ordnance_QF_2_pounder" class="mw-redirect" title="Ordnance QF 2 pounder">Ordnance QF 2 pounder</a>.</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Not to be confused with the <a href="/wiki/QF_1-pounder_pom-pom" title="QF 1-pounder pom-pom">QF 1-pounder</a> also known as the pom-pom.</div> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vcard" style="width:25.5em;border-spacing:2px;"><tbody><tr><th colspan="2" class="infobox-above hproduct" style="background-color:#C3D6EF;color:inherit;text-align:center;vertical-align:middle;font-size:110%;"><span class="fn org"> QF 2 pdr Mark VIII ("pom-pom") </span></th></tr><tr><td colspan="2" class="infobox-image" style="text-align:center;border-bottom:1px solid #aaa;line-height:1.5em;"><span typeof="mw:File"><a href="/wiki/File:HMAS_Nizam_AWM-009496.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ed/HMAS_Nizam_AWM-009496.jpg/300px-HMAS_Nizam_AWM-009496.jpg" decoding="async" width="300" height="225" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/e/ed/HMAS_Nizam_AWM-009496.jpg 1.5x" data-file-width="438" data-file-height="328" /></a></span><div class="infobox-caption">Quadruple 2 pdr MK VIII guns on Mk.VII mounting aboard <a href="/wiki/HMAS_Nizam_(G38)" title="HMAS Nizam (G38)">HMAS <i>Nizam</i></a> August 1941</div></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Type</th><td class="infobox-data"><a href="/wiki/Autocannon" title="Autocannon">Autocannon</a></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Place of origin</th><td class="infobox-data">United Kingdom</td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#C3D6EF;color:inherit;text-align:center;vertical-align:middle;font-size:110%;">Service history</th></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">In service</th><td class="infobox-data">1917–1940s (Mk II)<br />1930–1940s (Mk VIII)</td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Used by</th><td class="infobox-data"><a href="/wiki/British_Empire" title="British Empire">British Empire</a><br /><a href="/wiki/Japan" title="Japan">Japan</a><br /><a href="/wiki/Thailand" title="Thailand">Thailand</a><br /><a href="/wiki/Russian_Empire" title="Russian Empire">Russian Empire</a><br /><a href="/wiki/Kingdom_of_Italy" title="Kingdom of Italy">Kingdom of Italy</a><br /><a href="/wiki/Netherlands" title="Netherlands">Netherlands</a></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Wars</th><td class="infobox-data"><a href="/wiki/First_World_War" class="mw-redirect" title="First World War">First World War</a><br /><a href="/wiki/Second_World_War" class="mw-redirect" title="Second World War">Second World War</a></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#C3D6EF;color:inherit;text-align:center;vertical-align:middle;font-size:110%;">Production history</th></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Designer</th><td class="infobox-data"><a href="/wiki/Vickers_Armstrongs" class="mw-redirect" title="Vickers Armstrongs">Vickers Armstrongs</a></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Designed</th><td class="infobox-data">1915 (Mk II)<br />1923 (Mk VIII)</td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Variants</th><td class="infobox-data">Low-velocity (LV) & high-velocity (HV)<br />RHI, LHI, RHO, LHO for multiple mountings<br />Type 91 HI <i>Shiki</i> (Japanese)</td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#C3D6EF;color:inherit;text-align:center;vertical-align:middle;font-size:110%;">Specifications (Mk.VIII HV)</th></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Mass</th><td class="infobox-data">850 lb (390 kg)</td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Length</th><td class="infobox-data">8 ft 6 in (2.59 m)</td></tr><tr><td colspan="2" class="infobox-full-data"><hr /></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em"><a href="/wiki/Shell_(projectile)" title="Shell (projectile)">Shell</a></th><td class="infobox-data">40×158mmR</td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em"><a href="/wiki/Caliber" title="Caliber">Calibre</a></th><td class="infobox-data">40.4 mm (1.59 in)</td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Barrels</th><td class="infobox-data">1, 4 or 8</td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em"><a href="/wiki/Rate_of_fire" title="Rate of fire">Rate of fire</a></th><td class="infobox-data">115 rpm</td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em"><a href="/wiki/Muzzle_velocity" title="Muzzle velocity">Muzzle velocity</a></th><td class="infobox-data">new gun: 732 m/s (2,400 ft/s)<br />worn gun: 701 m/s (2,300 ft/s)<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Effective firing range</th><td class="infobox-data">3,960 m (13,300 ft) A/A ceiling</td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Maximum firing range</th><td class="infobox-data">6,220 m (20,400 ft) at 701 m/s (2,300 ft/s)<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Feed system</th><td class="infobox-data">14-round steel-link belt</td></tr><tr><th scope="row" class="infobox-label" style="padding-right:1em">Filling weight</th><td class="infobox-data">71 g (2.5 oz)</td></tr></tbody></table> <p>The <b>2-pounder gun</b>, officially the <b>QF 2-pounder</b> (<a href="/wiki/British_ordnance_terms#QF" class="mw-redirect" title="British ordnance terms">QF</a> denoting "quick firing") and universally known as the <b>pom-pom</b>, was a 40 mm (1.6 in) British <a href="/wiki/Autocannon" title="Autocannon">autocannon</a>, used as an <a href="/wiki/Anti-aircraft_warfare" title="Anti-aircraft warfare">anti-aircraft gun</a> by the <a href="/wiki/Royal_Navy" title="Royal Navy">Royal Navy</a>.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>note 1<span class="cite-bracket">]</span></a></sup> The name came from the sound that the original models make when firing. This QF 2-pounder was not the same gun as the <a href="/wiki/Ordnance_QF_2-pounder" title="Ordnance QF 2-pounder">Ordnance QF 2-pounder</a>, used by the <a href="/wiki/British_Army" title="British Army">British Army</a> as an <a href="/wiki/Anti-tank_gun" title="Anti-tank gun">anti-tank gun</a> and a <a href="/wiki/Tank_gun" title="Tank gun">tank gun</a>, although they both fired 2 lb (0.91 kg), 40 mm (1.6 in) projectiles. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Predecessors_–_Boer_War_and_the_Great_War"><span id="Predecessors_.E2.80.93_Boer_War_and_the_Great_War"></span>Predecessors – Boer War and the Great War</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=1" title="Edit section: Predecessors – Boer War and the Great War"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="QF_1_pounder">QF 1 pounder</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=2" title="Edit section: QF 1 pounder"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/QF_1-pounder_pom-pom" title="QF 1-pounder pom-pom">QF 1-pounder pom-pom</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:AustralianTroopsWithQF1pounderBoerWar.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/AustralianTroopsWithQF1pounderBoerWar.jpg/220px-AustralianTroopsWithQF1pounderBoerWar.jpg" decoding="async" width="220" height="153" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/AustralianTroopsWithQF1pounderBoerWar.jpg/330px-AustralianTroopsWithQF1pounderBoerWar.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7a/AustralianTroopsWithQF1pounderBoerWar.jpg/440px-AustralianTroopsWithQF1pounderBoerWar.jpg 2x" data-file-width="450" data-file-height="313" /></a><figcaption>Australian troops with a QF 1-pounder Maxim auto cannon captured from the Boers</figcaption></figure> <p>The first gun to be called a pom-pom was the <a href="/wiki/QF_1_pounder_pom-pom" class="mw-redirect" title="QF 1 pounder pom-pom">37 mm Nordenfelt-Maxim</a> or "QF 1-pounder" introduced during the <a href="/wiki/Second_Boer_War" title="Second Boer War">Second Boer War</a>, the smallest artillery piece of that war. It fired a shell 1 lb (0.45 kg) in weight accurately over a distance of 3,000 yd (1.7 mi; 2.7 km). The barrel was water-cooled, and the shells were belt-fed from a 25-round fabric belt. This "auto cannon" fired explosive rounds (smokeless ammunition) at 450 rounds per minute. The <a href="/wiki/Boer" class="mw-redirect" title="Boer">Boers</a> used them against the British, who, seeing their utility, bought guns from <a href="/wiki/Vickers" title="Vickers">Vickers</a>, which had acquired <a href="/wiki/Maxim_Nordenfelt_Guns_and_Ammunition_Company" title="Maxim Nordenfelt Guns and Ammunition Company">Maxim-Nordenfelt</a> in 1897.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> During the <a href="/wiki/World_War_I" title="World War I">First World War</a>, it was used in the trenches of the <a href="/wiki/Western_Front_(World_War_I)" title="Western Front (World War I)">Western Front</a> against aircraft. </p> <div class="mw-heading mw-heading3"><h3 id="QF_1+1⁄2-pounder"><span id="QF_1.2B1.E2.81.842-pounder"></span>QF <style data-mw-deduplicate="TemplateStyles:r1154941027">.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .den{vertical-align:sub}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);clip-path:polygon(0px 0px,0px 0px,0px 0px);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}</style><span class="frac">1<span class="sr-only">+</span><span class="num">1</span>⁄<span class="den">2</span></span>-pounder</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=3" title="Edit section: QF 1+1⁄2-pounder"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The first naval pom-pom was the QF 1.5-pdr Mark I, a piece with a calibre of 37 mm (1.46 in) and a barrel 43 <a href="/wiki/Caliber_(artillery)" title="Caliber (artillery)">calibres</a> long. This was tested in the <a href="/wiki/Arethusa-class_cruiser_(1913)" title="Arethusa-class cruiser (1913)"><i>Arethusa</i>-class</a> <a href="/wiki/Light_cruiser" title="Light cruiser">light cruisers</a> <a href="/wiki/HMS_Arethusa_(1913)" title="HMS Arethusa (1913)">HMS <i>Arethusa</i></a> and <a href="/wiki/HMS_Undaunted_(1914)" title="HMS Undaunted (1914)"><i>Undaunted</i></a> but did not enter full service, being replaced instead by a larger weapon, the QF 2-pdr Mark II (see below). </p> <div class="mw-heading mw-heading2"><h2 id="QF_2-pounder_Mark_II">QF 2-pounder Mark II</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=4" title="Edit section: QF 2-pounder Mark II"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:2pounderVickersCrewMesopotamia1918Front.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f8/2pounderVickersCrewMesopotamia1918Front.jpg/220px-2pounderVickersCrewMesopotamia1918Front.jpg" decoding="async" width="220" height="284" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f8/2pounderVickersCrewMesopotamia1918Front.jpg/330px-2pounderVickersCrewMesopotamia1918Front.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f8/2pounderVickersCrewMesopotamia1918Front.jpg/440px-2pounderVickersCrewMesopotamia1918Front.jpg 2x" data-file-width="800" data-file-height="1034" /></a><figcaption><div class="center" style="width:auto; margin-left:auto; margin-right:auto;">Posed photo of Mk II guarding a train against air attack, <a href="/wiki/Mesopotamia_Campaign" class="mw-redirect" title="Mesopotamia Campaign">Mesopotamia</a>, 1918</div></figcaption></figure> <p>The <b>QF 2-pounder Mark II</b> was a larger version of the <a href="/wiki/QF_1_pounder_pom-pom" class="mw-redirect" title="QF 1 pounder pom-pom">QF 1-pounder</a> Maxim gun produced by <a href="/wiki/Vickers" title="Vickers">Vickers</a>. It was a 40 mm calibre gun with a water-cooled barrel and a Vickers-Maxim mechanism. It was ordered in 1915 by the <a href="/wiki/Royal_Navy" title="Royal Navy">Royal Navy</a> as an anti-aircraft weapon for ships of cruiser size and below. The original models fired from hand-loaded fabric belts, although these were later replaced by steel-link belts. The enlargement was not entirely successful, as it left the mechanism rather light and prone to faults such as rounds falling out of the belts. In 1915, sixteen 2-pounders were mounted in armoured lorries as the <a href="/wiki/Pierce-Arrow_armoured_AA_lorry" title="Pierce-Arrow armoured AA lorry">Pierce-Arrow armoured AA lorry</a>. In 1918, one example of this weapon was experimentally mounted on the upper envelope of <a href="/wiki/23-class_airship" title="23-class airship">His Majesty's Airship 23r</a>.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>Surviving weapons were brought out of storage to see service in <a href="/wiki/World_War_II" title="World War II">World War II</a>, mainly on board ships such as <a href="/wiki/Naval_trawler" title="Naval trawler">naval trawlers</a>, motor boats and "armed yachts". It was used almost exclusively in the single-barrel, unpowered pedestal mountings P Mark II (Royal Navy nomenclature gave mountings and guns separate Mark numbers) except for a small number of weapons on the mounting Mark XV, which was a twin-barreled, powered mount. These were too heavy to be of any use at sea and were mounted ashore. All were scrapped by 1944. </p> <ul><li>Calibre: 40 mm L/39</li> <li>Total length: 96 in (2,400 mm).<sup id="cite_ref-Hogg&Thurston1972Page28_7-0" class="reference"><a href="#cite_note-Hogg&Thurston1972Page28-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></li> <li>Length of bore: 62 in (1,600 mm).<sup id="cite_ref-Hogg&Thurston1972Page28_7-1" class="reference"><a href="#cite_note-Hogg&Thurston1972Page28-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></li> <li>Rifling: Polygroove, plain section, 54.84 in (1,392.94 mm), uniform twist 1 in 30 in (760 mm), 12 grooves.<sup id="cite_ref-Hogg&Thurston1972Page28_7-2" class="reference"><a href="#cite_note-Hogg&Thurston1972Page28-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></li> <li>Weight of gun & breech assembly: 527 lb (239 kg)<sup id="cite_ref-Hogg&Thurston1972Page28_7-3" class="reference"><a href="#cite_note-Hogg&Thurston1972Page28-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></li> <li>Shell Weight: 2 lb (0.91 kg) HE.</li> <li>Rate of Fire: 200 rpm</li> <li>Effective Range: 1,200 yd (1,100 m)</li> <li>Muzzle Velocity: 1,920 ft/s (590 m/s)</li></ul> <p>Some 7,000 guns were made. The gun was also used by the Japanese as the 40 mm/62 "HI" Shiki. The <a href="/wiki/Regia_Marina" title="Regia Marina">Regia Marina</a> also used it from the Great War throughout World War II. It was superseded in the 1930s as a primary AA weapon on Italian warships by more modern guns, such as the <a href="/wiki/Cannone-Mitragliera_da_37/54_(Breda)" title="Cannone-Mitragliera da 37/54 (Breda)">Cannone-Mitragliera da 37/54 (Breda)</a>.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:QF_2_pounder_HMCS_Assiniboine_a104060-v6.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7e/QF_2_pounder_HMCS_Assiniboine_a104060-v6.jpg/220px-QF_2_pounder_HMCS_Assiniboine_a104060-v6.jpg" decoding="async" width="220" height="162" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7e/QF_2_pounder_HMCS_Assiniboine_a104060-v6.jpg/330px-QF_2_pounder_HMCS_Assiniboine_a104060-v6.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7e/QF_2_pounder_HMCS_Assiniboine_a104060-v6.jpg/440px-QF_2_pounder_HMCS_Assiniboine_a104060-v6.jpg 2x" data-file-width="600" data-file-height="441" /></a><figcaption>Gunners on <a href="/wiki/HMCS_Assiniboine_(I18)" class="mw-redirect" title="HMCS Assiniboine (I18)">HMCS <i>Assiniboine</i></a> fire their 2 pdr while escorting a troop convoy from Halifax to Britain, 10 July 1940.</figcaption></figure> <div class="mw-heading mw-heading2"><h2 id="QF_2-pounder_Mark_VIII">QF 2-pounder Mark VIII</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=5" title="Edit section: QF 2-pounder Mark VIII"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:MkVIIIpompomsHMSRodney1940.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f1/MkVIIIpompomsHMSRodney1940.jpg/220px-MkVIIIpompomsHMSRodney1940.jpg" decoding="async" width="220" height="164" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f1/MkVIIIpompomsHMSRodney1940.jpg/330px-MkVIIIpompomsHMSRodney1940.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f1/MkVIIIpompomsHMSRodney1940.jpg/440px-MkVIIIpompomsHMSRodney1940.jpg 2x" data-file-width="800" data-file-height="595" /></a><figcaption>8-barrelled "Chicago piano" on <a href="/wiki/HMS_Rodney_(29)" title="HMS Rodney (29)">HMS <i>Rodney</i></a>, viewed from below</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:QF_2-pounder_naval_gun_Seafront_(Zeebrugge)_25-06-2019_16-18-59.jpg" class="mw-file-description"><img alt=""The original Pom-Pom cannon of warship HMS Roberts on display at Seafront Zeebrugge."" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/71/QF_2-pounder_naval_gun_Seafront_%28Zeebrugge%29_25-06-2019_16-18-59.jpg/220px-QF_2-pounder_naval_gun_Seafront_%28Zeebrugge%29_25-06-2019_16-18-59.jpg" decoding="async" width="220" height="124" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/71/QF_2-pounder_naval_gun_Seafront_%28Zeebrugge%29_25-06-2019_16-18-59.jpg/330px-QF_2-pounder_naval_gun_Seafront_%28Zeebrugge%29_25-06-2019_16-18-59.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/71/QF_2-pounder_naval_gun_Seafront_%28Zeebrugge%29_25-06-2019_16-18-59.jpg/440px-QF_2-pounder_naval_gun_Seafront_%28Zeebrugge%29_25-06-2019_16-18-59.jpg 2x" data-file-width="6000" data-file-height="3376" /></a><figcaption>8-barrelled "Chicago piano" of <a href="/wiki/HMS_Roberts_(F40)" title="HMS Roberts (F40)">HMS <i>Roberts</i></a> at Seafront in Zeebrugge.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> Its full name is : Vickers 2pdr QF MK VIII</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:QF2_MkVIII_CWM_2.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/QF2_MkVIII_CWM_2.jpg/220px-QF2_MkVIII_CWM_2.jpg" decoding="async" width="220" height="293" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/QF2_MkVIII_CWM_2.jpg/330px-QF2_MkVIII_CWM_2.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5d/QF2_MkVIII_CWM_2.jpg/440px-QF2_MkVIII_CWM_2.jpg 2x" data-file-width="3000" data-file-height="4000" /></a><figcaption>QF2 Mk. VIII single mount from <a href="/wiki/HMCS_Kamloops_(K176)" class="mw-redirect" title="HMCS Kamloops (K176)">HMCS <i>Kamloops</i></a>, displayed in Canadian War Museum</figcaption></figure> <p>The <a href="/wiki/Royal_Navy" title="Royal Navy">Royal Navy</a> had identified the need for a rapid-firing, multi-barrelled close-range anti-aircraft weapon at an early stage. Design work for such a weapon began in 1923 based on the earlier Mark II, undoubtedly to use the enormous stocks of 2-pounder ammunition left over from the First World War. Lack of funding led to a convoluted and drawn-out design and trials history and it was not until 1930 that these weapons began to enter service. Known as the <b>QF 2-pounder Mark VIII</b>, it is usually referred to as the "multiple pom-pom". </p><p>The initial mounting was the 11.8 to 17.35 ton, eight-barrelled mounting Mark V (later Mark VI), suitable for ships of <a href="/wiki/Cruiser" title="Cruiser">cruiser</a> and <a href="/wiki/Aircraft_carrier" title="Aircraft carrier">aircraft carrier</a> size upward.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> From 1935, the quadruple mounting Mark VII, essentially half a Mark V or VI, entered service for ships of <a href="/wiki/Destroyer" title="Destroyer">destroyer</a> and <a href="/wiki/Cruiser" title="Cruiser">cruiser</a> size. These multiple gun mounts required four guns and were nicknamed the "Chicago Piano".<sup id="cite_ref-Hogg&Thurston1972Page28_7-4" class="reference"><a href="#cite_note-Hogg&Thurston1972Page28-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> The mount had two rows each of two or four guns. Guns were produced in both right- and left-hand and "inner" and "outer" so that the feed and ejector mechanisms matched. </p><p>Single-barrelled mounts, the Mark VIII (manual) and Mark XVI (power operated), were also widely used, mainly in small escorts (such as the <a href="/wiki/Flower-class_corvette" title="Flower-class corvette">Flower-class corvettes</a>) and coastal craft (especially early <a href="/wiki/Fairmile_D_motor_torpedo_boat" title="Fairmile D motor torpedo boat">Fairmile D motor torpedo boats</a>). The Mark XVI mounting was related to the twin mounting Mark V for the <a href="/wiki/Oerlikon_20_mm_cannon" title="Oerlikon 20 mm cannon">Oerlikon 20 mm cannon</a> and the "Boffin" mounting for the <a href="/wiki/Bofors_40_mm_Automatic_Gun_L/60" class="mw-redirect" title="Bofors 40 mm Automatic Gun L/60">Bofors 40 mm gun</a>. Magazines ranged from 140 rounds per gun for the eight-barrelled mount to 56 rounds for the single mounts.<sup id="cite_ref-ReferenceA_12-0" class="reference"><a href="#cite_note-ReferenceA-12"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> This large ammunition capacity (1,120 rounds) gave the eight-barrelled mount the ability to fire continuously for 73 seconds without reloading. A high velocity (HV), 1.8 lb (820 g), round was developed for the pom-pom, just before the Second World War, which raised the new gun muzzle velocity from 2,040 ft/s (622 m/s) to 2400 ft/s (732 m/s). </p><p>Many older mountings were modified with conversion kits to fire HV ammunition, while most new mounts were factory built to fire HV ammunition. A mount modified or designed for HV ammunition was given a '*' designation; for example a Mk V mount modified for HV ammunition would be a Mk V*.<sup id="cite_ref-ReferenceA_12-1" class="reference"><a href="#cite_note-ReferenceA-12"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="US_Navy">US Navy</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=6" title="Edit section: US Navy"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The United States Navy also considered adopting the pom-pom gun prior to its entry into the Second World War, and conducted a series of trials between their own <a href="/wiki/1.1%22/75_caliber_gun" class="mw-redirect" title="1.1"/75 caliber gun">1.1" gun</a>, the U.S. Army <a href="/wiki/37mm_Gun_M1" class="mw-redirect" title="37mm Gun M1">37 mm Gun</a>, the Vickers 40 mm pom-pom, and the <a href="/wiki/Bofors_40_mm_Automatic_Gun_L/60" class="mw-redirect" title="Bofors 40 mm Automatic Gun L/60">Bofors 40 mm</a>: </p> <style data-mw-deduplicate="TemplateStyles:r1244412712">.mw-parser-output .templatequote{overflow:hidden;margin:1em 0;padding:0 32px}.mw-parser-output .templatequotecite{line-height:1.5em;text-align:left;margin-top:0}@media(min-width:500px){.mw-parser-output .templatequotecite{padding-left:1.6em}}</style><blockquote class="templatequote"><p>Among the machine guns under consideration were the Army's 37-mm and the British Navy's 2-pounder, more commonly known as the "pompom." The decision soon narrowed to a choice between the Bofors and the British gun. The British were anxious to have their gun adopted, and the fact that British aid would be readily available in initiating manufacture was put forward as an argument in favor of its selection. The 2-pounder, moreover was giving a good account of itself on British ships. On the other hand, there was the distinct disadvantage that the gun was designed for cordite powder, and no manufacturing facilities for the production of this ammunition were available in the United States. Thorough study revealed that the gun could not be converted to take American powder. Another consideration was muzzle velocity: The pompom had a relatively low velocity, 2350 feet per second as compared with 2830 for the Bofors. The success of the pompom in action was more than offset by the proved qualities of the Bofors in the hands of a number of powers who were using it, and the Bureau decided to join that group. Shortly after the Bureau's selection of the Bofors, British naval officials also decided to adopt the gun.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup></p></blockquote> <div class="mw-heading mw-heading2"><h2 id="Wartime_use">Wartime use</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=7" title="Edit section: Wartime use"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Although an advanced weapon when it was introduced, by the outbreak of World War II advances in aircraft would have made it obsolete but for the introduction of the high-velocity round and new director designs. It was intended that the curtain of fire it threw up would be sufficient to deter attacking aircraft, which it did, but was hampered by the ineffective <a href="/wiki/Pom-Pom_Director#The_Pom-Pom_Director_Mark_I_-_III" class="mw-redirect" title="Pom-Pom Director">Mk III director</a>.<sup id="cite_ref-Campbell_p20_14-0" class="reference"><a href="#cite_note-Campbell_p20-14"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> The <a href="/wiki/Pom-Pom_Director" class="mw-redirect" title="Pom-Pom Director">MK IV Director</a> with a <a href="/wiki/Gyro_Rate_Unit" class="mw-redirect" title="Gyro Rate Unit">Gyro Rate Unit</a> and <a href="/wiki/Radar_Type_282#Type_282" class="mw-redirect" title="Radar Type 282">Type 282 radar</a><sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> was a great advance and was introduced on the <a href="/wiki/King_George_V-class_battleship_(1939)" title="King George V-class battleship (1939)"><i>King George V</i>-class battleships</a>. In January 1941, <a href="/wiki/HMS_Illustrious_(87)" title="HMS Illustrious (87)">HMS <i>Illustrious</i></a>′s Mk VIII (HV) mountings performed flawlessly firing 30,000 rounds with very few stoppages.<sup id="cite_ref-Campbell_p20_14-1" class="reference"><a href="#cite_note-Campbell_p20-14"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> When <a href="/wiki/HMS_Prince_of_Wales_(53)" title="HMS Prince of Wales (53)">HMS <i>Prince of Wales</i></a> was <a href="/wiki/Sinking_of_Prince_of_Wales_and_Repulse" title="Sinking of Prince of Wales and Repulse">attacked and sunk</a> by Japanese aircraft near Singapore, the subsequent report judged that a single <a href="/wiki/Bofors_40_mm_Automatic_Gun_L/60" class="mw-redirect" title="Bofors 40 mm Automatic Gun L/60">40 mm Bofors</a> gun firing tracer was a more effective anti-aircraft weapon<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> than a multiple pom-pom in director control, as the pom-poms did not have tracer ammunition and the pom-pom ammunition had deteriorated badly in its ready use lockers, while the Type 282 radar units also failed in the equatorial heat.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> In the same action, the Commissioned Gunner of <a href="/wiki/HMS_Repulse_(1916)" title="HMS Repulse (1916)">HMS <i>Repulse</i></a> spent the whole action running from one pom-pom mount to another trying to keep them operational due to the faulty ammunition. The pom-poms on <i>Repulse</i> shot down two of the four confirmed kills made by <a href="/wiki/Force_Z" title="Force Z">Force Z</a>,<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> while <i>Prince of Wales</i><span class="nowrap" style="padding-left:0.1em;">'</span> pom-poms did record hits on enemy aircraft.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p><p>The Royal Navy judged the pom-pom's effectiveness to range from about half that of the Bofors, per gun, against torpedo planes to about equal against <a href="/wiki/Kamikaze" title="Kamikaze">Kamikaze</a> attackers.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> It was a ubiquitous weapon that outnumbered the Bofors gun in Commonwealth naval service<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> up to the end of World War II and it shot down many Axis aircraft. Later innovations such as Remote Power Control (<a href="/wiki/List_of_British_ordnance_terms#RPC" class="mw-redirect" title="List of British ordnance terms">RPC</a>) coupled to a radar-equipped tachymetric (speed predicting) director increased the accuracy enormously and problems with the fuses and reliability were also remedied. The single mountings received a reprieve toward the end of the war as the 20 mm Oerlikon guns had insufficient <a href="/wiki/Stopping_power" title="Stopping power">stopping power</a> to counter Japanese <i>kamikaze</i> aircraft and there were insufficient numbers of Bofors guns to meet demand. </p> <ul><li>Calibre: 40 mm L/39</li> <li>Shell Weight: 2 lb. (980 g) or 1.8 lb. (820 g) for High-Velocity (<b>HV</b>) round</li> <li>Rate of Fire: 115 rpm fully automatic</li> <li>Effective Range: 3,800 yards (3,475 m) or 5,000 yards (4,572 m) HV</li> <li>Effective Ceiling (HV): 13,300 feet (3,960 m)</li> <li>Muzzle Velocity: 2,040 ft/s (622 m/s) or 2400 ft/s (732 m/s) for HV <sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading2"><h2 id="QF_2-pounder_Mark_XIV">QF 2-pounder Mark XIV</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=8" title="Edit section: QF 2-pounder Mark XIV"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Rolls-Royce_40_mm_cannon" title="Rolls-Royce 40 mm cannon">Rolls-Royce 40 mm cannon</a></div> <p>The <b>QF 2-pounder Mark XIV</b> was the <a href="/wiki/Rolls-Royce_40mm_Cannon" class="mw-redirect" title="Rolls-Royce 40mm Cannon">Rolls-Royce 40 mm cannon</a>, which had been developed by <a href="/wiki/Rolls-Royce_Limited" title="Rolls-Royce Limited">Rolls-Royce</a> as a competitor to the <a href="/wiki/Vickers_S" class="mw-redirect" title="Vickers S">40 mm "Vickers S" gun</a> as an aircraft weapon. The latter was the more successful design, and found some use as an anti-tank weapon. A reworked version was adopted by the Royal Navy as a weapon for <a href="/wiki/Motor_Gun_Boat" class="mw-redirect" title="Motor Gun Boat">Motor Gun Boats</a>, being adopted in the <a href="/wiki/Fairmile_C_motor_gun_boat" title="Fairmile C motor gun boat">Fairmile C</a> type as well as <a href="/wiki/British_Power_Boat_Company" title="British Power Boat Company">British Power Boat Company</a> 60- and 70-foot (18- and 21-metre) type MGBs. It had a semi-automatic horizontally sliding <a href="/wiki/Breech-loading_weapon" class="mw-redirect" title="Breech-loading weapon">breech block</a> and was shipped on a manually trained pedestal mount. The weapon was not a success and of the 1,200 ordered only some 600 were delivered. It was initially replaced in various MGBs by single 20 mm Oerlikon cannon in order to make good, being ultimately succeeded in the large quick-firer role later in the war by the 57 mm <a href="/wiki/Ordnance_QF_6-pounder" title="Ordnance QF 6-pounder">Molins 6-pounder gun</a>, the <a href="/wiki/British_Army" title="British Army">British Army</a>'s QF 6-pounder gun anti-tank gun with an auto-loader. </p> <div class="mw-heading mw-heading2"><h2 id="Ammunition">Ammunition</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=9" title="Edit section: Ammunition"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-packed"> <li class="gallerybox" style="width: 215.33333333333px"> <div class="thumb" style="width: 213.33333333333px;"><span typeof="mw:File"><a href="/wiki/File:QF2pdrVickersHVShell1943.jpg" class="mw-file-description" title="World War II high-velocity 2-pounder shells."><img alt="World War II high-velocity 2-pounder shells." src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/QF2pdrVickersHVShell1943.jpg/320px-QF2pdrVickersHVShell1943.jpg" decoding="async" width="214" height="140" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/QF2pdrVickersHVShell1943.jpg/480px-QF2pdrVickersHVShell1943.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/a/a9/QF2pdrVickersHVShell1943.jpg 2x" data-file-width="577" data-file-height="379" /></a></span></div> <div class="gallerytext"><div class="center" style="width:auto; margin-left:auto; margin-right:auto;">World War II high-velocity 2-pounder shells.</div></div> </li> <li class="gallerybox" style="width: 188.66666666667px"> <div class="thumb" style="width: 186.66666666667px;"><span typeof="mw:File"><a href="/wiki/File:The_Royal_Navy_during_the_Second_World_War_A2263.jpg" class="mw-file-description" title="A stack of 14 linked rounds of naval pom-pom ammunition."><img alt="A stack of 14 linked rounds of naval pom-pom ammunition." src="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/The_Royal_Navy_during_the_Second_World_War_A2263.jpg/280px-The_Royal_Navy_during_the_Second_World_War_A2263.jpg" decoding="async" width="187" height="140" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/The_Royal_Navy_during_the_Second_World_War_A2263.jpg/420px-The_Royal_Navy_during_the_Second_World_War_A2263.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/56/The_Royal_Navy_during_the_Second_World_War_A2263.jpg/560px-The_Royal_Navy_during_the_Second_World_War_A2263.jpg 2x" data-file-width="800" data-file-height="600" /></a></span></div> <div class="gallerytext"><div class="center" style="width:auto; margin-left:auto; margin-right:auto;"> A stack of 14 linked rounds of naval pom-pom ammunition.</div></div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=10" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/QF_1_pounder_pom-pom" class="mw-redirect" title="QF 1 pounder pom-pom">QF 1 pounder pom-pom</a></li> <li><a href="/wiki/List_of_anti-aircraft_guns" title="List of anti-aircraft guns">List of anti-aircraft guns</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=11" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text">British military of the period traditionally denoted smaller guns in terms of the approximate weight of the standard projectile, rather than by its bore diameter, which in this case was 40 mm. References to 40-mm anti-aircraft guns invariably mean the Bofors gun, while references to 2-pounder anti-aircraft guns mean this gun.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=12" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist reflist-columns references-column-width reflist-columns-2"> <ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text">Naval Weapons of WW2, Campbell, p. 71</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">Campbell, p.71</span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFHorn2012" class="citation book cs1">Horn, Bernd (22 December 2012). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=cNnSDFv7J1IC&q=second+boer+war+Boer%27s+++Maxim-Nordenfelt&pg=PA56"><i>Doing Canada Proud: The Second Boer War and the Battle of Paardeberg</i></a>. Dundurn. p. 56. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/9781459705784" title="Special:BookSources/9781459705784"><bdi>9781459705784</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Doing+Canada+Proud%3A+The+Second+Boer+War+and+the+Battle+of+Paardeberg&rft.pages=56&rft.pub=Dundurn&rft.date=2012-12-22&rft.isbn=9781459705784&rft.aulast=Horn&rft.aufirst=Bernd&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DcNnSDFv7J1IC%26q%3Dsecond%2Bboer%2Bwar%2BBoer%2527s%2B%2B%2BMaxim-Nordenfelt%26pg%3DPA56&rfr_id=info%3Asid%2Fen.wikipedia.org%3AQF+2-pounder+naval+gun" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKrott2002" class="citation web cs1">Krott, Rob (January 2002). <a rel="nofollow" class="external text" href="http://www.smallarmsreview.com/display.article.cfm?idarticles=2490">"South Africa's National Museum of Military History"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200211172810/http://www.smallarmsreview.com/display.article.cfm?idarticles=2490">Archived</a> from the original on 11 February 2020<span class="reference-accessdate">. Retrieved <span class="nowrap">27 August</span> 2019</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=South+Africa%27s+National+Museum+of+Military+History&rft.date=2002-01&rft.aulast=Krott&rft.aufirst=Rob&rft_id=http%3A%2F%2Fwww.smallarmsreview.com%2Fdisplay.article.cfm%3Fidarticles%3D2490&rfr_id=info%3Asid%2Fen.wikipedia.org%3AQF+2-pounder+naval+gun" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text">Patrick Abbott and Nick Walmsley, British Airships in Pictures: An Illustrated History, House of Lochar 1998, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/1-899863-48-6" title="Special:BookSources/1-899863-48-6">1-899863-48-6</a> (p.62)</span> </li> <li id="cite_note-Hogg&Thurston1972Page28-7"><span class="mw-cite-backlink">^ <a href="#cite_ref-Hogg&Thurston1972Page28_7-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Hogg&Thurston1972Page28_7-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Hogg&Thurston1972Page28_7-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Hogg&Thurston1972Page28_7-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-Hogg&Thurston1972Page28_7-4"><sup><i><b>e</b></i></sup></a></span> <span class="reference-text">I.V. Hogg & L.F. Thurston, British Artillery Weapons & Ammunition 1914-1918. London: Ian Allan, 1972, Page 28.</span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBagnasco1978" class="citation book cs1">Bagnasco, Erminio (1978). <i>Le armi delle navi italiane</i>. Parma: Albertelli. pp. <span class="nowrap">77–</span>80. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-8887372403" title="Special:BookSources/978-8887372403"><bdi>978-8887372403</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Le+armi+delle+navi+italiane&rft.place=Parma&rft.pages=%3Cspan+class%3D%22nowrap%22%3E77-%3C%2Fspan%3E80&rft.pub=Albertelli&rft.date=1978&rft.isbn=978-8887372403&rft.aulast=Bagnasco&rft.aufirst=Erminio&rfr_id=info%3Asid%2Fen.wikipedia.org%3AQF+2-pounder+naval+gun" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.belgiancoast.co.uk/en/exhibition-operation-north-sea-1944-45/star-wars">"Star Wars"</a>. <i>The Belgian Coast</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20201126124955/https://www.belgiancoast.co.uk/en/exhibition-operation-north-sea-1944-45/star-wars">Archived</a> from the original on 26 November 2020<span class="reference-accessdate">. Retrieved <span class="nowrap">1 November</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Belgian+Coast&rft.atitle=Star+Wars&rft_id=https%3A%2F%2Fwww.belgiancoast.co.uk%2Fen%2Fexhibition-operation-north-sea-1944-45%2Fstar-wars&rfr_id=info%3Asid%2Fen.wikipedia.org%3AQF+2-pounder+naval+gun" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text">Raven and Roberts, <i>British Cruisers of WW2</i>, p224. The first eight-barrelled mounting weighed 11.8 tons while a Remote Power Control mount along with 1.6 tons (1,200 rounds) of ammunition weighed 17.35 tons.</span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text">Campbell, <i>Naval Weapons of WW2</i>, p67 and p149. Campbell notes that a quad USN Bofors mount weighed 11.12 to 11.88 tons and only carried a maximum of 10 rounds per gun on the mount.</span> </li> <li id="cite_note-ReferenceA-12"><span class="mw-cite-backlink">^ <a href="#cite_ref-ReferenceA_12-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-ReferenceA_12-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">Campbell, <i>Naval Weapons of WW2</i>, P72</span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text">Rowland and Boyd, <i>U. S. NAVY BUREAU OF ORDNANCE IN WORLD WAR II</i>, USN Bureau of Ordnance, p223-224.</span> </li> <li id="cite_note-Campbell_p20-14"><span class="mw-cite-backlink">^ <a href="#cite_ref-Campbell_p20_14-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Campbell_p20_14-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">Campbell, Naval Weapons of WW2, p. 20</span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text">The Gunnery Pocket Book, p. 164</span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-16">^</a></b></span> <span class="reference-text">Middlebrook, <i>Battleship</i>, p. 340. The report does not note any 40mm Bofors kills or even hits from the <i>Prince of Wales</i><span class="nowrap" style="padding-left:0.1em;">'</span> Bofors gun, while hits from pom-pom fire were recorded by the crew of the <i>Prince of Wales</i>.</span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-17">^</a></b></span> <span class="reference-text">Middlebrook, <i>Battleship</i>, p. 340: "<i>It is considered that a Bofors with tracer ammunition in local control is a more valuable weapon than an 8 barrelled pom-pom in director control without tracer...</i>"</span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text">Brown, <i>A radar history of World War II: technical and military imperatives</i>, p. 220. Brown notes that 3 out of 4 type 282 radars were out of service when <i>Prince of Wales</i> departed Singapore.</span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-19">^</a></b></span> <span class="reference-text">Garzke and Dulin, <i>Allied Battleships</i>, p. 204, notes that the remaining type 282 and two type 285 radars failed after the first torpedo hit.</span> </li> <li id="cite_note-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-20">^</a></b></span> <span class="reference-text">Middlebrook, <i>Battleship</i>, p. 224</span> </li> <li id="cite_note-21"><span class="mw-cite-backlink"><b><a href="#cite_ref-21">^</a></b></span> <span class="reference-text">Middlebrook, <i>Battleship</i>, p. 340</span> </li> <li id="cite_note-22"><span class="mw-cite-backlink"><b><a href="#cite_ref-22">^</a></b></span> <span class="reference-text">Campbell, <i>Naval Weapons of WW2</i>, p. 67: "<i>...if control and mountings were of equal efficiency, the Bofors was reckoned to be twice as effective as the pom-pom against torpedo planes but not much better against very close range targets such as Kamikazes.</i>"</span> </li> <li id="cite_note-23"><span class="mw-cite-backlink"><b><a href="#cite_ref-23">^</a></b></span> <span class="reference-text">Campbell, pp. 67, 74.</span> </li> <li id="cite_note-24"><span class="mw-cite-backlink"><b><a href="#cite_ref-24">^</a></b></span> <span class="reference-text">Campbell,<i>Naval Weapons of WW2</i>, p. 71</span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Bibliography">Bibliography</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=13" title="Edit section: Bibliography"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Louis Brown, A radar history of World War II: technical and military imperatives. Institute of Physics Publishing, 1999. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-7503-0659-9" title="Special:BookSources/0-7503-0659-9">0-7503-0659-9</a>.</li> <li>John Campbell, Naval Weapons of World War Two. Naval Institute Press, 1986. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-87021-459-2" title="Special:BookSources/978-0-87021-459-2">978-0-87021-459-2</a>.</li> <li>Rowland and Boyd, U. S. NAVY BUREAU OF ORDNANCE IN WORLD WAR II, USN Bureau of Ordnance</li> <li>Garzke and Dulin, Battleships: Allied Battleships of World War II. Naval Institute Press, 1980. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-87021-100-3" title="Special:BookSources/978-0-87021-100-3">978-0-87021-100-3</a>.</li> <li><a href="/wiki/Ian_V._Hogg" title="Ian V. Hogg">I.V. Hogg</a> & L.F. Thurston, British Artillery Weapons & Ammunition 1914-1918. London: Ian Allan, 1972</li> <li>Martin Middlebrook and Patrick Mahoney, Battleship: The Loss of the Prince of Wales and the Repulse. Penguin Classic Military History, 2001. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-14-139119-9" title="Special:BookSources/978-0-14-139119-9">978-0-14-139119-9</a>.</li> <li>Alan Raven and John Roberts, British Cruisers of World War Two. Naval Institute Press, 1980. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-0-87021-922-1" title="Special:BookSources/978-0-87021-922-1">978-0-87021-922-1</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=QF_2-pounder_naval_gun&action=edit&section=14" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span></div> <div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; font-style: italic;"><a href="https://commons.wikimedia.org/wiki/Category:QF_2_pounder_pom-pom" class="extiw" title="commons:Category:QF 2 pounder pom-pom">QF 2 pounder pom-pom</a></span>.</div></div> </div> <ul><li><a rel="nofollow" class="external text" href="http://maritime.org/doc/br224/part4.htm#par473">THE 2-PDR. MARK VIII GUN ON THE MARK VII MOUNTING. in The Gunnery Pocket Book, B.R. 224/45, 1945</a> placed online courtesy of maritime.org</li> <li>Tony DiGiulian, <a rel="nofollow" class="external text" href="http://www.navweaps.com/Weapons/WNBR_2pounder_m9.php">"United Kingdom / Britain Miscellaneous 2-pdr [4 cm (1.575")] Guns"</a></li> <li>Tony DiGiulian, <a rel="nofollow" class="external text" href="http://www.navweaps.com/Weapons/WNBR_2pounder_m2.htm">2-pdr [4 cm/39 (1.575")] QF Mark II, Mark II* and Mark II*C</a></li> <li>Tony DiGiulian, <a rel="nofollow" class="external text" href="http://www.navweaps.com/Weapons/WNBR_2pounder_m8.php">2-pdr [4 cm/39 (1.575")] QF Mark VIII</a></li> <li>Tony DiGiulian, <a rel="nofollow" class="external text" href="http://www.navweaps.com/Weapons/WNJAP_40mm-62_HI.htm">Japanese 40 mm/62 (1.575") "HI" Type 91</a></li> <li>Anthony G Williams, <a rel="nofollow" class="external text" href="https://web.archive.org/web/20140421221344/http://www.quarry.nildram.co.uk/37-40mm.htm">37MM AND 40MM GUNS IN BRITISH SERVICE</a></li> <li><a rel="nofollow" class="external text" href="http://www.britishpathe.com/record.php?id=81593">Convoy to Malta; video footage of the pom pom in action.</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20111104165729/http://www.britishpathe.com/record.php?id=81593">Archived</a> 4 November 2011 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a></li> <li><a rel="nofollow" class="external text" href="http://www.britishpathe.com/record.php?id=23061">Malta Convoy; more video and audio footage of the pom-pom in action.</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110611093225/http://www.britishpathe.com/record.php?id=23061">Archived</a> 11 June 2011 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a></li> <li><a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=BYY9gmxwat0">Newsreel video of HMS Scylla's quad pom-pom fighting the Luftwaffe while protecting convoy PQ18</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist 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class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="background-color:#C3D6EF;color:inherit;"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini 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title="QF 6-pounder Hotchkiss">QF 6-pounder Hotchkiss</a></li> <li><a href="/wiki/QF_6-pounder_6_cwt_Hotchkiss" title="QF 6-pounder 6 cwt Hotchkiss">QF 6-pounder 6 cwt</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Infantry_support_gun" title="Infantry support gun">Infantry guns</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/1.59-inch_breech-loading_Vickers_Q.F._gun,_Mk_II" title="1.59-inch breech-loading Vickers Q.F. gun, Mk II">1.59-inch breech-loading Vickers Q.F. gun, Mk II</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Field_artillery" title="Field artillery">Field artillery</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BL_12-pounder_6_cwt_gun" title="BL 12-pounder 6 cwt gun">BL 12-pounder 6 cwt</a></li> <li><a href="/wiki/QF_12-pounder_8_cwt_gun" title="QF 12-pounder 8 cwt gun">QF 12-pounder 8 cwt</a></li> <li><a href="/wiki/QF_12-pounder_18_cwt_naval_gun#World_War_I_land_service" title="QF 12-pounder 18 cwt naval gun">QF 12-pounder 18 cwt</a></li> <li><a href="/wiki/QF_13-pounder_gun" title="QF 13-pounder gun">QF 13-pounder</a></li> <li><a href="/wiki/BL_15-pounder_gun" title="BL 15-pounder gun">BL 15-pounder</a></li> <li><a href="/wiki/BLC_15-pounder_gun" title="BLC 15-pounder gun">BLC 15-pounder</a></li> <li><a href="/wiki/QF_15-pounder_gun" title="QF 15-pounder gun">QF 15-pounder</a></li> <li><a href="/wiki/QF_18-pounder_gun" title="QF 18-pounder gun">QF 18-pounder</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_I_%E2%80%93_III#World_War_I_land_service" title="QF 4-inch naval gun Mk I – III">QF 4-inch gun Mk III</a></li> <li><a href="/wiki/BL_4-inch_Mk_VII_naval_gun#World_War_I_field_gun_service" title="BL 4-inch Mk VII naval gun">BL 4-inch gun Mk VII</a></li> <li><a href="/wiki/QF_4.5-inch_howitzer" title="QF 4.5-inch howitzer">QF 4.5-inch howitzer</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Medium & <a href="/wiki/Heavy_artillery" class="mw-redirect" title="Heavy artillery">heavy artillery</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_4.7-inch_Mk_I_%E2%80%93_IV_naval_gun" class="mw-redirect" title="QF 4.7-inch Mk I – IV naval gun">QF 4.7-inch gun</a></li> <li><a href="/wiki/BL_5-inch_howitzer" title="BL 5-inch howitzer">BL 5-inch howitzer</a></li> <li><a href="/wiki/BL_5.4-inch_howitzer" title="BL 5.4-inch howitzer">BL 5.4-inch howitzer</a></li> <li><a href="/wiki/BL_60-pounder_gun" title="BL 60-pounder gun">BL 60-pounder gun</a></li> <li><a href="/wiki/BL_6-inch_Mk_II_%E2%80%93_VI_naval_gun#BLC_Siege_gun" class="mw-redirect" title="BL 6-inch Mk II – VI naval gun">BLC 6-inch siege gun</a></li> <li><a href="/wiki/BL_6-inch_Mk_VII_naval_gun" title="BL 6-inch Mk VII naval gun">BL 6-inch gun Mk VII</a></li> <li><a href="/wiki/BL_6-inch_gun_Mk_XIX" title="BL 6-inch gun Mk XIX">BL 6-inch gun Mk XIX</a></li> <li><a href="/wiki/BL_6-inch_26_cwt_howitzer" title="BL 6-inch 26 cwt howitzer">BL 6-inch 26 cwt howitzer</a></li> <li><a href="/wiki/BL_6-inch_30_cwt_howitzer" title="BL 6-inch 30 cwt howitzer">BL 6-inch 30 cwt howitzer</a></li> <li><a href="/wiki/BL_8-inch_howitzer_Mk_I_%E2%80%93_V" title="BL 8-inch howitzer Mk I – V">BL 8-inch howitzer Mk I – V</a></li> <li><a href="/wiki/BL_8-inch_howitzer_Mk_VI_%E2%80%93_VIII" title="BL 8-inch howitzer Mk VI – VIII">BL 8-inch howitzer Mk VI – VIII</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Siege artillery</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BL_7.5-inch_Mk_II_%E2%80%93_V_naval_gun" title="BL 7.5-inch Mk II – V naval gun">BL 7.5-inch Mk III naval gun</a></li> <li><a href="/wiki/BL_9.2-inch_howitzer" title="BL 9.2-inch howitzer">BL 9.2-inch howitzer</a></li> <li><a href="/wiki/BL_9.2-inch_Mk_IX_%E2%80%93_X_naval_gun" title="BL 9.2-inch Mk IX – X naval gun">BL 9.2-inch Mk X naval gun</a></li> <li><a href="/wiki/BL_12-inch_howitzer" title="BL 12-inch howitzer">BL 12-inch howitzer</a></li> <li><a href="/wiki/BL_12-inch_Mk_X_naval_gun" title="BL 12-inch Mk X naval gun">BL 12-inch Mk X naval gun</a></li> <li><a href="/wiki/BL_15-inch_howitzer" title="BL 15-inch howitzer">BL 15-inch howitzer</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Mountain_gun" title="Mountain gun">Mountain artillery</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/RML_2.5-inch_mountain_gun" title="RML 2.5-inch mountain gun">RML 2.5-inch mountain gun</a></li> <li><a href="/wiki/BL_10-pounder_mountain_gun" title="BL 10-pounder mountain gun">BL 10-pounder mountain gun</a></li> <li><a href="/wiki/BL_2.75-inch_mountain_gun" title="BL 2.75-inch mountain gun">BL 2.75-inch mountain gun</a></li> <li><a href="/wiki/QF_2.95-inch_mountain_gun" title="QF 2.95-inch mountain gun">QF 2.95-inch mountain gun</a></li> <li><a href="/wiki/QF_3.7-inch_mountain_howitzer" title="QF 3.7-inch mountain howitzer">QF 3.7-inch mountain howitzer</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Mortar_(weapon)" title="Mortar (weapon)">Mortars</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Garland_trench_mortar" title="Garland trench mortar">Garland trench mortar</a></li> <li><a href="/wiki/Stokes_mortar" title="Stokes mortar">3-inch Stokes mortar</a></li> <li><a href="/wiki/Vickers_1.57-inch_mortar" class="mw-redirect" title="Vickers 1.57-inch mortar">Vickers 1.57-inch mortar</a></li> <li><a href="/wiki/2-inch_medium_mortar" title="2-inch medium mortar">2-inch medium mortar</a></li> <li><a href="/wiki/Newton_6-inch_mortar" title="Newton 6-inch mortar">Newton 6-inch mortar</a></li> <li><a href="/wiki/9.45-inch_Heavy_Mortar" class="mw-redirect" title="9.45-inch Heavy Mortar">9.45-inch Heavy Mortar</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Smoke and chemical weapons</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>4-inch Stokes Mortar</li> <li><a href="/wiki/Livens_Projector" title="Livens Projector">Livens Projector</a></li> <li><a href="/wiki/Livens_Large_Gallery_Flame_Projector" title="Livens Large Gallery Flame Projector">Livens Large Gallery Flame Projector</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Anti-aircraft_warfare" title="Anti-aircraft warfare">Anti-aircraft guns</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_1-pounder_pom-pom" title="QF 1-pounder pom-pom">QF 1-pounder pom-pom</a></li> <li><a class="mw-selflink selflink">QF 2-pounder "pom-pom" Mk II</a></li> <li><a href="/wiki/Canon_de_75_mod%C3%A8le_1897#British_service" title="Canon de 75 modèle 1897">75 mm AA gun</a></li> <li><a href="/wiki/QF_12-pounder_12_cwt_AA_gun" title="QF 12-pounder 12 cwt AA gun">QF 12-pounder 12 cwt</a></li> <li><a href="/wiki/QF_13-pounder_6_cwt_AA_gun" title="QF 13-pounder 6 cwt AA gun">QF 13-pounder 6 cwt</a></li> <li><a href="/wiki/QF_13-pounder_Mk_IV_AA_gun" title="QF 13-pounder Mk IV AA gun">QF 13-pounder Mk IV</a></li> <li><a href="/wiki/QF_13-pounder_9_cwt" title="QF 13-pounder 9 cwt">QF 13-pounder 9 cwt</a></li> <li><a href="/wiki/QF_3-inch_20_cwt" title="QF 3-inch 20 cwt">QF 3-inch 20 cwt</a></li> <li><a href="/wiki/QF_18-pounder_gun#Mk_II_Gun_on_High-angle_Anti-aircraft_mounting" title="QF 18-pounder gun">QF 18-pounder</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_V" title="QF 4-inch naval gun Mk V">QF 4-inch Mk V</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Coastal_artillery" title="Coastal artillery">Coastal artillery</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_12-pounder_12_cwt_naval_gun" title="QF 12-pounder 12 cwt naval gun">QF 12-pounder 12 cwt</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_I_%E2%80%93_III" title="QF 4-inch naval gun Mk I – III">QF 4-inch naval gun Mk I – III</a></li> <li><a href="/wiki/BL_6-inch_Mk_VII_naval_gun" title="BL 6-inch Mk VII naval gun">BL 6-inch Mk VII naval gun</a></li> <li><a href="/wiki/BL_9.2-inch_Mk_IX_%E2%80%93_X_naval_gun" title="BL 9.2-inch Mk IX – X naval gun">BL 9.2-inch Mk IX – X naval gun</a></li> <li><a href="/wiki/RML_9-inch_12-ton_gun#Mk_VI_high-angle_gun" title="RML 9-inch 12-ton gun">RML 9-inch</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Railway_gun" title="Railway gun">Railway guns</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BL_9.2-inch_railway_gun" title="BL 9.2-inch railway gun">BL 9.2-inch railway gun</a></li> <li><a href="/wiki/BL_12-inch_railway_gun" title="BL 12-inch railway gun">BL 12-inch railway gun</a></li> <li><a href="/wiki/BL_12-inch_railway_howitzer" title="BL 12-inch railway howitzer">BL 12-inch railway howitzer</a></li> <li><a href="/wiki/BL_14-inch_railway_gun" title="BL 14-inch railway gun">BL 14-inch railway gun</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="British_Empire_naval_weapons_of_the_First_World_War4069" style=";wide;padding:3px"><table class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="background-color:#C3D6EF;color:inherit;"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:GreatWarBritishNavalWeapons" title="Template:GreatWarBritishNavalWeapons"><abbr title="View this template" style="color:inherit">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:GreatWarBritishNavalWeapons" title="Template talk:GreatWarBritishNavalWeapons"><abbr title="Discuss this template" style="color:inherit">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:GreatWarBritishNavalWeapons" title="Special:EditPage/Template:GreatWarBritishNavalWeapons"><abbr title="Edit this template" style="color:inherit">e</abbr></a></li></ul></div><div id="British_Empire_naval_weapons_of_the_First_World_War4069" style="font-size:114%;margin:0 4em"><a href="/wiki/British_Empire" title="British Empire">British Empire</a> naval weapons of the <a href="/wiki/World_War_I" title="World War I">First World War</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Monitor_(warship)" title="Monitor (warship)">Monitor</a> guns</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BL_9.2-inch_Mk_I_%E2%80%93_VII_naval_gun" title="BL 9.2-inch Mk I – VII naval gun">BL 9.2-inch Mk VI</a></li> <li><a href="/wiki/BL_9.2-inch_Mk_VIII_naval_gun" title="BL 9.2-inch Mk VIII naval gun">BL 9.2-inch Mk VIII</a></li> <li><a href="/wiki/BL_9.2-inch_Mk_IX_%E2%80%93_X_naval_gun" title="BL 9.2-inch Mk IX – X naval gun">BL 9.2-inch Mk X</a></li> <li><a href="/w/index.php?title=BL_9.2-inch_Mk_XII_naval_gun&action=edit&redlink=1" class="new" title="BL 9.2-inch Mk XII naval gun (page does not exist)">BL 9.2-inch Mk XII</a></li> <li><a href="/wiki/BL_12-inch_Mk_VIII_naval_gun" title="BL 12-inch Mk VIII naval gun">BL 12-inch Mk VIII</a></li> <li><a href="/wiki/14-inch/45-caliber_gun" title="14-inch/45-caliber gun">BL 14-inch Mk II</a> (US built)</li> <li><a href="/wiki/BL_15-inch_Mk_I_naval_gun" title="BL 15-inch Mk I naval gun">BL 15-inch Mk I</a></li> <li><a href="/wiki/BL_18-inch_Mk_I_naval_gun" title="BL 18-inch Mk I naval gun">BL 18-inch Mk I</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Capital_ship" title="Capital ship">Capital ship</a> main armament</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Vickers_10-inch_45-calibre_naval_gun" title="Vickers 10-inch 45-calibre naval gun">Vickers 10-inch 45 cal.</a></li> <li><a href="/wiki/EOC_10-inch_45-calibre_naval_gun" title="EOC 10-inch 45-calibre naval gun">EOC 10-inch 45 cal.</a></li> <li><a href="/wiki/BL_12-inch_Mk_VIII_naval_gun" title="BL 12-inch Mk VIII naval gun">BL 12-inch Mk VIII</a></li> <li><a href="/wiki/Armstrong_Whitworth_12-inch_40-calibre_naval_gun" title="Armstrong Whitworth 12-inch 40-calibre naval gun">BL 12-inch Mk IX</a></li> <li><a href="/wiki/BL_12-inch_Mk_X_naval_gun" title="BL 12-inch Mk X naval gun">BL 12-inch Mk X</a></li> <li><a href="/wiki/BL_12-inch_Mk_XI_%E2%80%93_XII_naval_gun" title="BL 12-inch Mk XI – XII naval gun">BL 12-inch Mk XI & XII</a></li> <li><a href="/wiki/EOC_12-inch_45-calibre_naval_gun" title="EOC 12-inch 45-calibre naval gun">EOC 12-inch 45 cal. Mk XIII</a></li> <li><a href="/wiki/BL_13.5-inch_Mk_I_%E2%80%93_IV_naval_gun" title="BL 13.5-inch Mk I – IV naval gun">BL 13.5-inch Mk I – IV</a></li> <li><a href="/wiki/BL_13.5-inch_Mk_V_naval_gun" title="BL 13.5-inch Mk V naval gun">BL 13.5-inch Mk V</a></li> <li><a href="/wiki/BL_13.5-inch_Mk_VI_naval_gun" title="BL 13.5-inch Mk VI naval gun">BL 13.5-inch Mk VI</a></li> <li><a href="/wiki/EOC_14-inch_45-calibre_naval_gun" title="EOC 14-inch 45-calibre naval gun">EOC 14-inch 45 cal. Mk I</a></li> <li><a href="/wiki/BL_15-inch_Mk_I_naval_gun" title="BL 15-inch Mk I naval gun">BL 15-inch Mk I</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Armoured_cruiser" class="mw-redirect" title="Armoured cruiser">Armoured cruiser</a> main armament</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BL_7.5-inch_Mk_I_naval_gun" title="BL 7.5-inch Mk I naval gun">BL 7.5-inch Mk I</a></li> <li><a href="/wiki/BL_9.2-inch_Mk_IX_%E2%80%93_X_naval_gun" title="BL 9.2-inch Mk IX – X naval gun">BL 9.2-inch Mk X</a></li> <li><a href="/wiki/BL_9.2-inch_Mk_XI_naval_gun" title="BL 9.2-inch Mk XI naval gun">BL 9.2-inch Mk XI</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Secondary armament and<br /><a href="/wiki/Light_cruiser" title="Light cruiser">light cruiser</a> main armament</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_12-pounder_18_cwt_naval_gun" title="QF 12-pounder 18 cwt naval gun">QF 12-pounder 18 cwt</a></li> <li><a href="/wiki/QF_14-pounder_Maxim-Nordenfelt_naval_gun" title="QF 14-pounder Maxim-Nordenfelt naval gun">QF 14-pounder Maxim-Nordenfelt</a></li> <li><a href="/wiki/QF_14-pounder_naval_gun_Mk_I_%26_II" title="QF 14-pounder naval gun Mk I & II">QF 14-pounder Mk I & II</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_I_%E2%80%93_III" title="QF 4-inch naval gun Mk I – III">QF 4-inch Mk III</a></li> <li><a href="/wiki/BL_4-inch_Mk_VII_naval_gun" title="BL 4-inch Mk VII naval gun">BL 4-inch Mk VII</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_V" title="QF 4-inch naval gun Mk V">QF 4-inch Mk V</a></li> <li><a href="/wiki/BL_4-inch_Mk_IX_naval_gun" title="BL 4-inch Mk IX naval gun">BL 4-inch Mk IX</a></li> <li><a href="/wiki/BL_5.5-inch_Mk_I_naval_gun" title="BL 5.5-inch Mk I naval gun">BL 5.5-inch Mk I</a></li> <li><a href="/wiki/QF_6-inch_naval_gun" title="QF 6-inch naval gun">QF 6-inch Mk I – III</a></li> <li><a href="/wiki/BL_6-inch_Mk_VII_naval_gun" title="BL 6-inch Mk VII naval gun">BL 6-inch Mk VII</a></li> <li><a href="/wiki/BL_6-inch_Mk_XI_naval_gun" title="BL 6-inch Mk XI naval gun">BL 6-inch Mk XI</a></li> <li><a href="/wiki/BL_6-inch_Mk_XII_naval_gun" title="BL 6-inch Mk XII naval gun">BL 6-inch Mk XII</a></li> <li><a href="/wiki/BL_6-inch_Mk_XIII_%E2%80%93_XVIII_naval_gun" title="BL 6-inch Mk XIII – XVIII naval gun">BL 6-inch Mk XIII-XVIII</a></li> <li><a href="/wiki/BL_7.5-inch_Mk_II_%E2%80%93_V_naval_gun" title="BL 7.5-inch Mk II – V naval gun">BL 7.5-inch Mk II – Mk V</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Destroyer" title="Destroyer">Destroyer</a> and<br />small cruiser armament</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_12-pounder_12_cwt_naval_gun" title="QF 12-pounder 12 cwt naval gun">QF 12-pounder 12 cwt Mk II</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_I_%E2%80%93_III" title="QF 4-inch naval gun Mk I – III">QF 4-inch Mk III</a></li> <li><a href="/wiki/BL_4-inch_Mk_VIII_naval_gun" title="BL 4-inch Mk VIII naval gun">BL 4-inch Mk VIII</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_IV,_XII,_XXII" title="QF 4-inch naval gun Mk IV, XII, XXII">QF 4-inch Mk IV</a></li> <li><a href="/wiki/BL_4.7-inch_45-calibre_naval_gun" title="BL 4.7-inch 45-calibre naval gun">BL 4.7-inch Mk I</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Merchant ship armament</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_4.7-inch_Mk_I_%E2%80%93_IV_naval_gun" class="mw-redirect" title="QF 4.7-inch Mk I – IV naval gun">QF 4.7-inch Mk I – IV</a></li> <li><a href="/wiki/QF_4.7-inch_Mk_V_naval_gun" title="QF 4.7-inch Mk V naval gun">QF 4.7-inch Mk V*</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Submarine guns</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BL_4-inch_Mk_XI_naval_gun" class="mw-redirect" title="BL 4-inch Mk XI naval gun">BL 4-inch Mk XI</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_IV,_XII,_XXII" title="QF 4-inch naval gun Mk IV, XII, XXII">QF 4-inch Mk XII</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Anti-aircraft_warfare" title="Anti-aircraft warfare">Anti-aircraft guns</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a class="mw-selflink selflink">QF 2-pounder "pom-pom" Mk II</a></li> <li><a href="/wiki/QF_3-inch_20_cwt" title="QF 3-inch 20 cwt">QF 3-inch 20 cwt</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_V" title="QF 4-inch naval gun Mk V">QF 4-inch Mk V</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Light weapons</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Vickers_machine_gun" title="Vickers machine gun">.303 Vickers machine gun</a></li> <li><a href="/wiki/QF_3-pounder_Hotchkiss" title="QF 3-pounder Hotchkiss">QF 3-pounder Hotchkiss</a></li> <li><a href="/wiki/QF_3-pounder_Vickers" title="QF 3-pounder Vickers">QF 3-pounder Vickers</a></li> <li><a href="/wiki/QF_6-pounder_Hotchkiss" title="QF 6-pounder Hotchkiss">QF 6-pounder Hotchkiss</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Torpedo" title="Torpedo">Torpedoes</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/British_18-inch_torpedo" title="British 18-inch torpedo">18-inch Mk V – VIII</a></li> <li><a href="/wiki/British_21-inch_torpedo#21-inch_Mark_II" title="British 21-inch torpedo">21-inch Mk II</a></li> <li><a href="/wiki/British_21-inch_torpedo#21-inch_Mark_IV" title="British 21-inch torpedo">21-inch Mk IV</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Naval_mine" title="Naval mine">Mines</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Navy_Spherical_Mine&action=edit&redlink=1" class="new" title="Navy Spherical Mine (page does not exist)">Spherical Mk I, II and III</a></li> <li><a href="/w/index.php?title=Vickers_Elia_mine&action=edit&redlink=1" class="new" title="Vickers Elia mine (page does not exist)">Vickers Elia mine</a></li> <li><a href="/w/index.php?title=Type_H_mine&action=edit&redlink=1" class="new" title="Type H mine (page does not exist)">Type H mine</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Anti-submarine weapons</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Type_A_Depth_charge&action=edit&redlink=1" class="new" title="Type A Depth charge (page does not exist)">Type A Depth charge</a></li> <li><a href="/w/index.php?title=Type_B_Depth_charge&action=edit&redlink=1" class="new" title="Type B Depth charge (page does not exist)">Type B Depth charge</a></li> <li><a href="/w/index.php?title=Type_C_Depth_charge&action=edit&redlink=1" class="new" title="Type C Depth charge (page does not exist)">Type C Depth charge</a></li> <li><a href="/w/index.php?title=Type_D_Depth_charge&action=edit&redlink=1" class="new" title="Type D Depth charge (page does not exist)">Type D Depth charge</a></li> <li><a href="/w/index.php?title=Type_E_Depth_charge&action=edit&redlink=1" class="new" title="Type E Depth charge (page does not exist)">Type E Depth charge</a></li> <li><a href="/w/index.php?title=Type_F_Depth_charge&action=edit&redlink=1" class="new" title="Type F Depth charge (page does not exist)">Type F Depth charge</a></li> <li><a href="/w/index.php?title=Type_G_Depth_charge&action=edit&redlink=1" class="new" title="Type G Depth charge (page does not exist)">Type G Depth charge</a></li> <li><a href="/w/index.php?title=Cruiser_Mine&action=edit&redlink=1" class="new" title="Cruiser Mine (page does not exist)">Cruiser Mine</a></li> <li><a href="/w/index.php?title=BL_7.5-inch_Naval_Howitzer&action=edit&redlink=1" class="new" title="BL 7.5-inch Naval Howitzer (page does not exist)">7.5-inch howitzer</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Landing guns</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_12-pounder_8_cwt_gun" title="QF 12-pounder 8 cwt gun">QF 12-pounder 8 cwt</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="British_Commonwealth_naval_weapons_of_the_Second_World_War3856" style=";wide;padding:3px"><table class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="background-color:#C3D6EF;color:inherit;"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:WWIIBritishCommNavalWeapons" title="Template:WWIIBritishCommNavalWeapons"><abbr title="View this template" style="color:inherit">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:WWIIBritishCommNavalWeapons" title="Template talk:WWIIBritishCommNavalWeapons"><abbr title="Discuss this template" style="color:inherit">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:WWIIBritishCommNavalWeapons" title="Special:EditPage/Template:WWIIBritishCommNavalWeapons"><abbr title="Edit this template" style="color:inherit">e</abbr></a></li></ul></div><div id="British_Commonwealth_naval_weapons_of_the_Second_World_War3856" style="font-size:114%;margin:0 4em"><a href="/wiki/British_Commonwealth" class="mw-redirect" title="British Commonwealth">British Commonwealth</a> naval weapons of the <a href="/wiki/World_War_II" title="World War II">Second World War</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Category:World_War_II_monitors_of_the_United_Kingdom" title="Category:World War II monitors of the United Kingdom">Monitor</a> guns</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BL_15-inch_Mk_I_naval_gun" title="BL 15-inch Mk I naval gun">BL 15-inch</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Capital_ship" title="Capital ship">Capital ship</a> main armament</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BL_14-inch_Mk_VII_naval_gun" title="BL 14-inch Mk VII naval gun">BL 14-inch</a></li> <li><a href="/wiki/BL_15-inch_Mk_I_naval_gun" title="BL 15-inch Mk I naval gun">BL 15-inch</a></li> <li><a href="/wiki/BL_16-inch_Mk_I_naval_gun" title="BL 16-inch Mk I naval gun">BL 16-inch</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Heavy_cruiser" title="Heavy cruiser">Heavy cruiser</a> main armament</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BL_7.5-inch_Mk_VI_naval_gun" title="BL 7.5-inch Mk VI naval gun">BL 7.5-inch Mk VI</a></li> <li><a href="/wiki/BL_8-inch_Mk_VIII_naval_gun" title="BL 8-inch Mk VIII naval gun">BL 8-inch Mk VIII</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Secondary armament and<br /><a href="/wiki/Light_cruiser" title="Light cruiser">light cruiser</a> main armament</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_4-inch_naval_gun_Mk_V" title="QF 4-inch naval gun Mk V">QF 4-inch Mk V</a></li> <li><a href="/wiki/QF_4.5-inch_Mk_I_%E2%80%93_V_naval_gun" title="QF 4.5-inch Mk I – V naval gun">QF 4.5-inch</a></li> <li><a href="/wiki/QF_5.25-inch_naval_gun" title="QF 5.25-inch naval gun">QF 5.25-inch</a></li> <li><a href="/wiki/BL_5.5-inch_Mk_I_naval_gun" title="BL 5.5-inch Mk I naval gun">BL 5.5-inch</a></li> <li><a href="/wiki/BL_6-inch_Mk_XII_naval_gun" title="BL 6-inch Mk XII naval gun">BL 6-inch Mk XII</a></li> <li><a href="/wiki/BL_6-inch_Mk_XXII_naval_gun" title="BL 6-inch Mk XXII naval gun">BL 6-inch Mk XXII</a></li> <li><a href="/wiki/BL_6-inch_Mk_XXIII_naval_gun" title="BL 6-inch Mk XXIII naval gun">BL 6-inch Mk XXIII</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Category:World_War_II_minesweepers_of_the_United_Kingdom" title="Category:World War II minesweepers of the United Kingdom">Minesweeper</a>, <a href="/wiki/Category:World_War_II_sloops_of_the_United_Kingdom" title="Category:World War II sloops of the United Kingdom">Sloop</a>, <a href="/wiki/Category:World_War_II_corvettes_of_the_United_Kingdom" title="Category:World War II corvettes of the United Kingdom">Corvette</a>,<br /><a href="/wiki/Category:World_War_II_frigates_of_the_United_Kingdom" title="Category:World War II frigates of the United Kingdom">Frigate</a> and <a href="/wiki/Category:World_War_II_destroyers_of_the_United_Kingdom" title="Category:World War II destroyers of the United Kingdom">Destroyer</a> armament</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_6-pounder_10_cwt_gun" title="QF 6-pounder 10 cwt gun">QF 6-pounder 10 cwt</a></li> <li><a href="/wiki/QF_12-pounder_12_cwt_naval_gun" title="QF 12-pounder 12 cwt naval gun">QF 12-pounder 12 cwt Mk V</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_IV,_XII,_XXII" title="QF 4-inch naval gun Mk IV, XII, XXII">QF 4-inch Mk IV</a></li> <li><a href="/wiki/BL_4-inch_Mk_IX_naval_gun" title="BL 4-inch Mk IX naval gun">BL 4-inch Mk IX</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_XVI" title="QF 4-inch naval gun Mk XVI">QF 4-inch Mk XVI</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_XIX" title="QF 4-inch naval gun Mk XIX">QF 4-inch Mk XIX</a></li> <li><a href="/wiki/QF_4.5-inch_Mk_I_%E2%80%93_V_naval_gun" title="QF 4.5-inch Mk I – V naval gun">QF 4.5-inch</a></li> <li><a href="/wiki/BL_4.7-inch_45-calibre_naval_gun" title="BL 4.7-inch 45-calibre naval gun">BL 4.7-inch Mk II</a></li> <li><a href="/wiki/QF_4.7-inch_Mk_IX_%26_XII_naval_gun" title="QF 4.7-inch Mk IX & XII naval gun">QF 4.7-inch Mk IX & XII</a></li> <li><a href="/wiki/QF_4.7-inch_Mk_XI_naval_gun" title="QF 4.7-inch Mk XI naval gun">QF 4.7-inch Mk XI</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Category:World_War_II_submarines_of_the_United_Kingdom" title="Category:World War II submarines of the United Kingdom">Submarine</a> guns</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/QF_12-pounder_12_cwt_naval_gun" title="QF 12-pounder 12 cwt naval gun">QF 12-pounder 12 cwt Mk V</a></li> <li><a href="/wiki/QF_3-inch_20_cwt" title="QF 3-inch 20 cwt">QF 3-inch 20 cwt</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_IV,_XII,_XXII" title="QF 4-inch naval gun Mk IV, XII, XXII">QF 4-inch Mk XII & XXII</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Anti-aircraft_warfare" title="Anti-aircraft warfare">Anti-aircraft weapons</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Unrotated_projectile" class="mw-redirect" title="Unrotated projectile">Unrotated projectile</a></li> <li><a href="/wiki/Holman_Projector" title="Holman Projector">Holman Projector</a></li> <li><a href="/wiki/Oerlikon_20_mm_cannon" title="Oerlikon 20 mm cannon">20 mm Oerlikon</a></li> <li><a class="mw-selflink selflink">QF 2-pounder "pom-pom" Mk VIII</a></li> <li><a href="/wiki/Bofors_40_mm_Automatic_Gun_L/60" class="mw-redirect" title="Bofors 40 mm Automatic Gun L/60">40 mm Bofors</a></li> <li><a href="/wiki/QF_3-inch_20_cwt" title="QF 3-inch 20 cwt">QF 3-inch 20 cwt</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_V" title="QF 4-inch naval gun Mk V">QF 4-inch Mk V</a></li> <li><a href="/wiki/QF_4-inch_naval_gun_Mk_XVI" title="QF 4-inch naval gun Mk XVI">QF 4-inch Mk XVI</a></li> <li><a href="/wiki/QF_4.5-inch_Mk_I_%E2%80%93_V_naval_gun" title="QF 4.5-inch Mk I – V naval gun">QF 4.5-inch</a></li> <li><a href="/wiki/QF_4.7-inch_Mk_VIII_naval_gun" title="QF 4.7-inch Mk VIII naval gun">QF 4.7-inch Mk VIII</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Light weapons</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Lewis_gun" title="Lewis gun">.303 Lewis machine gun</a></li> <li><a href="/wiki/Vickers_.50_machine_gun" title="Vickers .50 machine gun">.50 Vickers Mk III machine gun</a></li> <li><a href="/wiki/QF_3-pounder_Vickers" title="QF 3-pounder Vickers">QF 3-pounder Vickers</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;"><a href="/wiki/Torpedo" title="Torpedo">Torpedoes</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/British_21-inch_torpedo#21-inch_Mark_VII" title="British 21-inch torpedo">21-inch Mk VII</a></li> <li><a href="/wiki/British_21-inch_torpedo#21-inch_Mark_VIII" title="British 21-inch torpedo">21-inch Mk VIII</a></li> <li><a href="/wiki/British_21-inch_torpedo#21-inch_Mark_X" title="British 21-inch torpedo">21-inch Mk X</a></li> <li><a href="/wiki/British_21-inch_torpedo#21-inch_Mark_XI" title="British 21-inch torpedo">21-inch Mk XI</a></li> <li><a href="/wiki/British_24.5-inch_torpedo" title="British 24.5-inch torpedo">24.5-inch Mk I</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Anti-submarine weapons</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Thornycroft <a href="/wiki/Depth_charge_thrower" class="mw-redirect" title="Depth charge thrower">depth charge thrower</a></li> <li><a href="/wiki/Hedgehog_(weapon)" title="Hedgehog (weapon)">Hedgehog</a></li> <li><a href="/wiki/Squid_(weapon)" title="Squid (weapon)">Squid</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Small craft armament</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ordnance_QF_6-pounder#Molins_gun" title="Ordnance QF 6-pounder">Molins 6-pounder</a></li> <li><a href="/wiki/Vickers_K_machine_gun" title="Vickers K machine gun">Vickers K machine gun</a></li> <li><a href="/wiki/British_18-inch_torpedo" title="British 18-inch torpedo">18-inch torpedo</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;">Foreign-sourced weapons</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Oerlikon_20_mm_cannon" title="Oerlikon 20 mm cannon">20 mm Oerlikon</a></li> <li><a href="/wiki/Bofors_40_mm_Automatic_Gun_L/60" class="mw-redirect" title="Bofors 40 mm Automatic Gun L/60">40 mm Bofors</a></li> <li><a href="/wiki/3%22/23_caliber_gun" class="mw-redirect" title="3"/23 caliber gun">3-inch 23 caliber gun (US)</a></li> <li><a href="/wiki/3%22/50_caliber_gun" class="mw-redirect" title="3"/50 caliber gun">3-inch 50 caliber gun (US)</a></li> <li><a href="/wiki/4%22/50_caliber_gun" class="mw-redirect" title="4"/50 caliber gun">4-inch 50 caliber Mark 9 gun (US)</a></li> <li><a href="/wiki/5%22/51_caliber_gun" class="mw-redirect" title="5"/51 caliber gun">5-inch 51 caliber Mark 8 gun (US)</a></li> <li><a href="/wiki/Y-gun" class="mw-redirect" title="Y-gun">Y-gun</a> depth charge projector (US)</li> <li><a href="/wiki/Bliss%E2%80%93Leavitt_Mark_8_torpedo" title="Bliss–Leavitt Mark 8 torpedo">Mark 8 torpedo (US)</a></li></ul> </div></td></tr></tbody></table></div> <p class="mw-empty-elt"> </p>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" 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