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HMS H42
Career
Name: HMS H42
Builder: Armstrong Whitworth, Newcastle Upon Tyne
Laid down: September 1917
Commissioned: 1 May 1919
Fate: Sunk in collision 23 March 1922
General characteristics
Class & type: H class submarine
Displacement: 423 long tons (430 t) surfaced
510 long tons (518 t) submerged
Length: 171 ft 0 in (52.12 m)
Beam: 15 ft 4 in (4.67 m)
Propulsion: 1 × 480 hp (358 kW) diesel engine
2 × 620 hp (462 kW) electric motors
Speed: 11.5 knots (21.3 km/h; 13.2 mph) surfaced
9 knots (17 km/h; 10 mph) submerged
Range: 2,985 nmi (5,528 km) at 7.5 kn (13.9 km/h; 8.6 mph) surfaced
130 nmi (240 km) at 2 kn (3.7 km/h; 2.3 mph) submerged
Complement: 22
Armament: • 4 × 21 in (533 mm) bow torpedo tubes
• 8 × 21 inch torpedoes

HMS H42 was a British H class submarine built by Armstrong Whitworth, Newcastle Upon Tyne. She was laid down in September 1917 and was commissioned on 1 May 1919.

On 23 March 1922, H42 was practising torpedo attacks against British destroyers steaming off Europa Point, Gibraltar,[1] when she surfaced unexpectedly only 30[1] or 120[2] yards (27 or 110 metres) – sources differ – ahead of the destroyer HMS Versatile. Versatile, making 20 knots, went to full speed astern on her engines and put her helm over hard to port, but had not yet begun to answer her helm when she rammed H42 abaft the conning tower, almost slicing the submarine in half. H42 sank with the loss of all hands. An investigation found H42 at fault for surfacing where she did against instructions.[2][3]

References[]

  • Hutchinson, Robert. Submarines, War Beneath The Waves, From 1776 To The Present Day. 
  • Richardson, Alexander and Archibald Hurd. (editors). Brassey's Naval and Shipping Annual 1923. London, William Clowes, 1923.

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