HMS H4

HMS H4 at Brindisi, August 1916
History
United Kingdom
Name	H4
Builder	Canadian Vickers, Montreal
Laid down	11 January 1915
Launched	1 April 1915
Commissioned	5 June 1915
Fate	Sold, 30 November 1921
General characteristics
Class and type	H-class submarine
Displacement	364 long tons (370 t) surfaced 434 long tons (441 t) submerged
Length	150 ft 3 in (45.80 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	13 knots (24 km/h; 15 mph) surfaced 10 knots (19 km/h; 12 mph) submerged
Range	1,600 nmi (3,000 km) at 10 kn (19 km/h; 12 mph) surfaced 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[1]

HMS H4 was a British H-class submarine built by the Canadian Vickers Co., Montreal. She was laid down on 11 January 1915 and was commissioned on 5 June 1915. After her commissioning, HMS H4 and sister ships H1, H2 and H3 crossed the Atlantic from St. John's, Newfoundland to Gibraltar being escorted by the armed merchant cruiser HMS Calgarian. H4 sank the U-boat UB-52 in the Adriatic on 23 May 1918. She was sold on 30 November 1921 in Malta.