British H class submarine

H4 at Brindisi, August 1916
Class overview
Operators:	Royal Navy
Preceded by:	British E class submarine
Succeeded by:	British J class submarine
In commission:	26 May 1915–1945
Completed:	42
Lost:	9
Retired:	33
General characteristics
Displacement:	Group 1+2 : 363 long tons (369 t) surfaced 434 long tons (441 t) submerged Group 3 : 423 long tons (430 t) surfaced 510 long tons (518 t) submerged
Length:	Group 1+2 : 150 ft 3 in (45.80 m) Group 3 : 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:	Group 1+2 : 13 knots (24 km/h; 15 mph) surfaced 10 knots (19 km/h; 12 mph) submerged Group 3 : 11.5 knots (21.3 km/h; 13.2 mph) surfaced 9 knots (17 km/h; 10 mph) submerged
Range:	Group 1+2 : 1,600 nmi (3,000 km) at 10 kn (19 km/h; 12 mph) surfaced Group 3 : 2,985 nmi (5,528 km) at 7.5 kn (13.9 km/h; 8.6 mph) surfaced Group 1+2+3 : 130 nmi (240 km) at 2 kn (3.7 km/h; 2.3 mph) submerged
Complement:	22
Armament:	• 4 × 18 in (457 mm) bow torpedo tubes • 8 × 18 inch torpedoes • 1 × QF 6 pounder gun (H1–H4 only)[1]

An H-class submarine under construction.

Three H-class submarines (lower left).

HMS H5, H6, H7, H8, H9, and H10 with the drydocked British armoured cruiser HMS Carnarvon (at upper left) during World War I, sometime between the 1915 commissioning of the submarines and the 4 May 1917 sale of H6 to the Netherlands.

The British H class submarines were Holland 602 type submarines used by the Royal Navy. The submarines constructed for the British Royal Navy between 1915 and 1919 were designed and built in response to German boats which mined British waters and sank coastal shipping with ease due to their small size. The H-Class was therefore created to perform similar operations in German waters, and to attack German submarines operating in British waters.

Despite their cramped size and lack of a deck gun, the class became enormously popular amongst submariners, and saw action all around the British Isles, some being transferred as far as the Adriatic. Due to the later arrival of most of the class, they were unable to have a massive impact, only achieving two victories (the German submarines U-51 and First World War.

Post-war many were retained in the Royal Navy for training purposes, and four more were lost in wrecks during the 1920s. At the outbreak of the Second World War they were hopelessly obsolete, but nevertheless were retained in training and coastal warfare roles to help the Royal Navy cope with heavy losses to the submarine fleet during the early stages of the war. Two were sunk during this duty by German countermeasures. The Canada built boats were equipped with Fessenden transducers, which were missing from the US built boats.

Boats

Group 1

Group 1 was built in Canada at the Canadian Vickers Yards in Montreal before being transported across the Atlantic and deployed from Britain. This was necessary because British shipyards were too overcrowded and busy to construct submarines at this time.

• H1 - Launched May 1915
• H2 - Launched June 1915
• H3 - Launched June 1915. Mined and sunk July 1916
• H4 - Launched June 1915
• H5 - Launched June 1915. Rammed and sunk March 1918
• H6 - Launched June 1915. Interned and purchased by the Dutch January 1916
• H7 - Launched June 1915
• H8 - Launched June 1915
• H9 - Launched June 1915
• H10 - Launched June 1915. Disappeared 1918

Group 2

The second group was constructed simultaneously with the first group, but at Fore River Yard at Quincy. Massachusetts in the then neutral United States. When the US government discovered the construction, they impounded all the completed units, only releasing them following their own declaration of war two years later. To escape this difficulty, the British government gave six units to the Chilean Navy as partial payment for the appropriation of six Chilean ships for British service in 1914

• H11 - Launched 1915.
• H12 - Launched 1915.
• H13 - Launched 1918, transferred to Chile
• CH-14 - Launched 1919, transferred to Canada
• CH-15 - Launched 1918, transferred to Canada
• H16 - Launched 1918, transferred to Chile
• H17 - Launched 1918, transferred to Chile
• H18 - Launched 1918, transferred to Chile
• H19 - Launched 1918, transferred to Chile
• H20 - Launched 1918, transferred to Chile

Group 3

Group 3 was the largest group, and was constructed in 1917–1919 in Britain, shipyard space having been granted to the project and more boats needed following the seizure of those building in the United States. They were built by Vickers, Cammell Laird, Armstrong Whitworth and William Beardmore at several locations, and most of the boats enjoyed long careers in the Royal Navy.

• H21 - Launched 1918
• H22 - Launched 1918
• H23 - Launched 1918
• H24 - Launched 1918
• H25 - Launched 1918
• H26 - Launched 1918
• H28 - Launched 1918
• H29 - Launched 1918. Sank in dockyard accident 1926
• H30 - Launched 1918
• H31 - Launched 1919. Mined and sunk 1941
• H32 - Launched 1919
• H33 - Launched 1919
• H34 - Launched 1919
  • Numbers H35-H40 not used.
• H41 - Launched 1918. Wrecked in collision 1920
• H42 - Launched 1919. Wrecked in collision 1922
• H43 - Launched 1919
• H44 - Launched 1920
  • Numbers H45 and H46 cancelled.
• H47 - Launched 1919. Wrecked in collision 1929
• H48 - Launched 1919
• H49 - Launched 1919. Sunk by German surface units 1940
• H50 - Launched 1920
• H51 - Launched 1919
• H52 - Launched 1919
  • HMS H53 and H54 cancelled.

See also

Media related to British H class submarines at Wikimedia Commons

Notes

1. ^ Britain 6-pdr / 8cwt [2.244"/40 (57 mm)] QF Marks I and II

References

External links

• The Canadian built British H boats
• U-boat.net information page on surviving World War Two boats