HMS J1
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HMAS J1 in 1919
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| History | |
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 *United Kingdom
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| Builder: | HM Dockyard at Portsmouth in Hampshire |
| Launched: | 6 November 1915 |
| Decommissioned: | 12 July 1922 |
| Fate: | Hulk scuttled |
| General characteristics | |
| Class and type: | British J class submarine |
| Displacement: |
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| Length: | 275 ft (84 m) |
| Beam: | 22 ft (6.7 m) |
| Draught: | 14 ft (4.3 m) |
| Propulsion: |
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| Speed: |
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| Range: | 4,000 nmi (7,400 km; 4,600 mi) at 12 kn (22 km/h; 14 mph) |
| Test depth: | 300 ft (91 m) max |
| Complement: | 44 personnel |
| Armament: |
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HMS J1 (later HMAS J1) was a J class submarine operated by the Royal Navy and the Royal Australian Navy.
The J class was designed by the Royal Navy in response to reported German submarines with surface speeds over 18 knots (33 km/h; 21 mph). They had a displacement of 1,210 tons surfaced, and 1,820 tons submerged. Each submarine was 275 feet (84 m) in length overall, with a beam of 22 feet (6.7 m), and a draught of 14 feet (4.3 m). The propulsion system was built around three propeller shafts; the J-class were the only triple-screwed submarines ever built by the British. Propulsion came from three 12-cylinder diesel motors when on the surface, and electric motors when submerged. Top speed was 19 knots (35 km/h; 22 mph) on the surface (the fastest submarines in the world at the time of construction), and 9.5 knots (17.6 km/h; 10.9 mph) underwater. Range was 4,000 nautical miles (7,400 km; 4,600 mi) at 12 knots (22 km/h; 14 mph).
Armament consisted of six 18-inch torpedo tubes (four forward, one on each beam), plus a 4-inch deck gun. 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. 44 personnel were aboard.
J1 was built by HM Dockyard at Portsmouth in Hampshire, and launched on 6 November 1915.
J1 operated in patrols in the North Sea. In November 1916, a German force of half a destroyer flotilla, three dreadnoughts, and a battlecruiser set out from port to rescue two submarines U-20 and U-30 that were stranded in fog off Jutland. On the return, having only rescued one of the submarines, the force passed J1 off Horns Reef on 5 November 1916. Two of the dreadnoughts, SMS Kronprinz and SMS Grosser Kurfürst, were torpedoed by J1, earning her commanding officer, Commander N. F. Laurence, a Bar for his Distinguished Service Order. The dreadnoughts did not sink, but reached port and underwent repairs.
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