HMS J7: Difference between revisions
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{{EngvarB|date=December 2016}} | {{EngvarB|date=December 2016}} | ||
{{Use dmy dates|date=December 2016}} | {{Use dmy dates|date=December 2016}} | ||
{{Infobox ship | |||
{{Infobox ship image | |section1={{Infobox ship/image | ||
| | |image = HMAS J7 (AWM H12461).jpg | ||
| | |image_caption = HMAS ''J7'' | ||
}} | }} | ||
{{Infobox ship career | |||
| | |section2={{Infobox ship/career | ||
| | |country = United Kingdom | ||
| | |flag = {{shipboxflag|United Kingdom|naval}} | ||
| | |name = HMS ''J7'' | ||
| | |ordered = | ||
| | |builder = HM Dockyard, Devonport | ||
| | |yard_number = | ||
| | |laid_down = | ||
| | |launched = 12 February 1917 | ||
| | |acquired = | ||
| | |commissioned = | ||
| | |decommissioned = | ||
}} | |fate = Transferred to Australia, 25 March 1919 | ||
{{Infobox ship career | }} | ||
| | |||
| | |section3={{Infobox ship/career | ||
| | |hide_header=title | ||
| | |country = Australia | ||
| | |flag = {{shipboxflag|Australia|naval-1913}} | ||
| | |name = HMAS ''J7'' | ||
| | |acquired = 25 March 1919 | ||
| | |commissioned = | ||
| | |decommissioned = 12 July 1922 | ||
}} | |fate = Sunk 4 June 1926 | ||
{{Infobox ship characteristics | |notes=Still extant as breakwater as of 2021 | ||
| | }} | ||
| | |||
*{{convert|1760|LT|t}} (submerged) | |section4={{Infobox ship/characteristics | ||
| | |class = {{sclass2|J|submarine}} | ||
| | |displacement = *{{convert|1210|LT|t}} (surfaced) | ||
| | *{{convert|1760|LT|t}} (submerged) | ||
| | |length = {{convert|275|ft|abbr=on}} | ||
*Surfaced: three 12-cylinder diesel engines | |beam = {{convert|22|ft|abbr=on}} | ||
*Submerged: battery-driven electric motors | |draught = {{convert|14|ft|abbr=on}} | ||
| | |propulsion = *Three shafts | ||
*{{convert|9.5|kn|abbr=on}} (submerged) | *Surfaced: three 12-cylinder diesel engines | ||
| | *Submerged: battery-driven electric motors | ||
| | |speed = *{{convert|19|kn|abbr=on|lk=in}} (surfaced) | ||
| | *{{convert|9.5|kn|abbr=on}} (submerged) | ||
| | |range = {{convert|4000|nmi|abbr=on}} at {{convert|12|kn|abbr=on}} | ||
| | |endurance = | ||
| | |test_depth = {{convert|300|ft|m|abbr=on}} max{{citation needed|date=January 2014}} | ||
| | |complement = 44 personnel | ||
*(four bow, two beam) | |sensors = | ||
*one {{convert|4|in|mm|0|abbr=on}} gun | |EW = | ||
| | |armament = *six [[British 18-inch torpedo|18-inch (450 mm)]] torpedo tubes | ||
*(four bow, two beam) | |||
*one {{convert|4|in|mm|0|abbr=on}} gun | |||
|notes = | |||
}} | |||
}} | }} | ||
'''HMS J7''' (later '''HMAS J7''') was a {{sclass2|J|submarine}} operated by the [[Royal Navy]] and the [[Royal Australian Navy]]. | |||
'''HMS J7''' (later '''HMAS J7''') was a | |||
==Design and construction== | ==Design and construction== | ||
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The J class was designed by the Royal Navy in response to reported German submarines with surface speeds over {{convert|18|kn}}.<ref name=Bastock86>Bastock, ''Australia's Ships of War'', p. 86</ref> The submarines had a displacement of 1,210 tons surfaced, but ''J7'' had a lighter submerged displacement than her sister boats, at 1,760 tons.<ref name=Bastock86/> Each submarine was {{convert|275|ft}} in length overall, with a beam of {{convert|22|ft}}, and a draught of {{convert|14|ft}}.<ref name=Bastock86/> The propulsion system was built around three propeller shafts; the J-class were the only triple-screwed submarines ever built by the British.<ref name=Bastock86/> Propulsion came from three 12-cylinder diesel motors when on the surface, and electric motors when submerged.<ref name=Bastock86/> Top speed was {{convert|19|kn}} on the surface (the fastest submarines in the world at the time of construction), and {{convert|9.5|kn}} underwater.<ref name=Bastock86/> Range was {{convert|4,000|nmi}} at {{convert|12|kn}}.<ref name=Bastock86/> | The J class was designed by the Royal Navy in response to reported German submarines with surface speeds over {{convert|18|kn}}.<ref name=Bastock86>Bastock, ''Australia's Ships of War'', p. 86</ref> The submarines had a displacement of 1,210 tons surfaced, but ''J7'' had a lighter submerged displacement than her sister boats, at 1,760 tons.<ref name=Bastock86/> Each submarine was {{convert|275|ft}} in length overall, with a beam of {{convert|22|ft}}, and a draught of {{convert|14|ft}}.<ref name=Bastock86/> The propulsion system was built around three propeller shafts; the J-class were the only triple-screwed submarines ever built by the British.<ref name=Bastock86/> Propulsion came from three 12-cylinder diesel motors when on the surface, and electric motors when submerged.<ref name=Bastock86/> Top speed was {{convert|19|kn}} on the surface (the fastest submarines in the world at the time of construction), and {{convert|9.5|kn}} underwater.<ref name=Bastock86/> Range was {{convert|4,000|nmi}} at {{convert|12|kn}}.<ref name=Bastock86/> | ||
Armament consisted of six [[British 18 inch torpedo|18 inch (450 mm)]] torpedo tubes (four forward, one on each beam), plus a 4-inch deck gun.<ref name=Bastock86/> Originally, the gun was mounted on a [[Breastwork (fortification)|breastwork]] fitted forward of the conning tower, but the breastwork was later extended to the bow and merged into the hull for streamlining, and the gun was relocated to a platform fitted to the front of the [[conning tower]].<ref name=Bastock86/> The conning tower on ''J7'' was sited {{convert|60|ft|m}} further back than her sister boats, as the control room was located behind the machinery spaces.<ref name=Bastock86/><ref name=tall>{{cite book |title=HM Submarines in Camera An Illustrated History of British Submarines |last=Tall |first=J.J |author2=Paul Kemp |year=1996 |publisher=Sutton Publishing |isbn=0-7509-0875-0 |page=54}}</ref> 44 personnel were aboard.<ref name=Bastock86/> | Armament consisted of six [[British 18-inch torpedo|18-inch (450 mm)]] torpedo tubes (four forward, one on each beam), plus a 4-inch deck gun.<ref name=Bastock86/> Originally, the gun was mounted on a [[Breastwork (fortification)|breastwork]] fitted forward of the conning tower, but the breastwork was later extended to the bow and merged into the hull for streamlining, and the gun was relocated to a platform fitted to the front of the [[conning tower]].<ref name=Bastock86/> The conning tower on ''J7'' was sited {{convert|60|ft|m}} further back than her sister boats, as the control room was located behind the machinery spaces.<ref name=Bastock86/><ref name=tall>{{cite book |title=HM Submarines in Camera An Illustrated History of British Submarines |last=Tall |first=J.J |author2=Paul Kemp |year=1996 |publisher=Sutton Publishing |isbn=0-7509-0875-0 |page=54}}</ref> 44 personnel were aboard.<ref name=Bastock86/> | ||
''J7'' was built by [[HMNB Devonport|HM Dockyard Devonport]] in [[Plymouth]] and launched on 12 February 1917.<ref>{{Cite web |title=HMAS J7 |publisher=Royal Australian Navy |url=http://www.navy.gov.au/hmas-j7 |accessdate=2011-03-13 }}</ref> | ''J7'' was built by [[HMNB Devonport|HM Dockyard Devonport]] in [[Plymouth]] and launched on 12 February 1917.<ref>{{Cite web |title=HMAS J7 |publisher=Royal Australian Navy |url=http://www.navy.gov.au/hmas-j7 |accessdate=2011-03-13 }}</ref> | ||
==Operational history== | ==Operational history== | ||
After the war, the [[British Admiralty]] decided that the best way to protect the Pacific region was with a force of submarines and cruisers.<ref name=Bastock86/> To this end, they offered the six surviving submarines of the J | After the war, the [[British Admiralty]] decided that the best way to protect the Pacific region was with a force of submarines and cruisers.<ref name=Bastock86/> To this end, they offered the six surviving submarines of the J class to the [[Royal Australian Navy]] as gifts.<ref name=Bastock86/> ''J1'' and her sisters were commissioned into the RAN in April 1919, and sailed for Australia on 9 April, in the company of the cruisers {{HMAS|Sydney|1912|2}} and {{HMAS|Brisbane|1915|2}}, and the tender {{HMAS|Platypus|1917|2}}.<ref name=Bastock86/> The flotilla reached Thursday Island on 29 June, and Sydney on 10 July.<ref name=Bastock86/> Because of the submarines' condition after the long voyage, they were immediately taken out of service for refits.<ref name=Bastock86/> | ||
{{stack|[[File:HMAS J7 Submarine Sandringham Yacht Club 600 1662.JPG|thumb|Wreck of HMAS ''J7'' at the Sandringham Yacht Club marina]]}} | {{stack|[[File:HMAS J7 Submarine Sandringham Yacht Club 600 1662.JPG|thumb|Wreck of HMAS ''J7'' at the Sandringham Yacht Club marina]]}} | ||
Latest revision as of 14:14, 13 December 2025
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Script error: No such module "Infobox".Template:Template otherTemplate:Infobox ship/subboxTemplate:Infobox ship/subboxTemplate:Infobox ship/subboxTemplate:Infobox ship/subboxHMS J7 (later HMAS J7) was a Script error: No such module "WPSHIPS utilities". operated by the Royal Navy and the Royal Australian Navy.
Design and construction
Script error: No such module "Labelled list hatnote". The J class was designed by the Royal Navy in response to reported German submarines with surface speeds over Script error: No such module "convert"..[1] The submarines had a displacement of 1,210 tons surfaced, but J7 had a lighter submerged displacement than her sister boats, at 1,760 tons.[1] Each submarine was Script error: No such module "convert". in length overall, with a beam of Script error: No such module "convert"., and a draught of Script error: No such module "convert"..[1] The propulsion system was built around three propeller shafts; the J-class were the only triple-screwed submarines ever built by the British.[1] Propulsion came from three 12-cylinder diesel motors when on the surface, and electric motors when submerged.[1] Top speed was Script error: No such module "convert". on the surface (the fastest submarines in the world at the time of construction), and Script error: No such module "convert". underwater.[1] Range was Script error: No such module "convert". at Script error: No such module "convert"..[1]
Armament consisted of six 18-inch (450 mm) torpedo tubes (four forward, one on each beam), plus a 4-inch deck gun.[1] Originally, the gun was mounted on a breastwork fitted forward of the conning tower, but the breastwork was later extended to the bow and merged into the hull for streamlining, and the gun was relocated to a platform fitted to the front of the conning tower.[1] The conning tower on J7 was sited Script error: No such module "convert". further back than her sister boats, as the control room was located behind the machinery spaces.[1][2] 44 personnel were aboard.[1]
J7 was built by HM Dockyard Devonport in Plymouth and launched on 12 February 1917.[3]
Operational history
After the war, the British Admiralty decided that the best way to protect the Pacific region was with a force of submarines and cruisers.[1] To this end, they offered the six surviving submarines of the J class to the Royal Australian Navy as gifts.[1] J1 and her sisters were commissioned into the RAN in April 1919, and sailed for Australia on 9 April, in the company of the cruisers Script error: No such module "WPSHIPS utilities". and Script error: No such module "WPSHIPS utilities"., and the tender Script error: No such module "WPSHIPS utilities"..[1] The flotilla reached Thursday Island on 29 June, and Sydney on 10 July.[1] Because of the submarines' condition after the long voyage, they were immediately taken out of service for refits.[1]
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By the time J7 was returned to service in June 1922, the cost of maintaining the boats and deteriorating economic conditions saw the six submarines decommissioned and marked for disposal.[1]
Fate
J7 was paid off on 12 July 1922,Script error: No such module "Unsubst". and was sold on 26 February 1924Script error: No such module "Unsubst".. The hulk was scuttled in 1930, for use as a breakwater at the Sandringham Yacht Club in Port Phillip.[4] Some years later a stone marina was constructed around the wreck, which was left in situ and visible, being too expensive to remove, where it continues to deteriorate.[4]
Citations
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References
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External links
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