HMS H5 was a British H-class submarine of the Royal Navy that served in the First World War. The boat, which was launched in June 1915, was lost after being rammed by a British merchant ship off Caernarfon Bay in March 1916. It had been mistaken as a German U-boat and sank with the loss of all hands.
HMS H2 was a British H-class submarine built by Canadian Vickers, Montreal. She was laid down on 11 January 1915 and was commissioned on 4 June 1915. After commissioning, H2 crossed the Atlantic from St. John's, Newfoundland to Gibraltar escorted by the armed merchant cruiser HMS Calgarian. She was accompanied by H1, H3 and H4. H2 was sold in Malta on 7 March 1921.
HMS H3 was a British H-class submarine built by Canadian Vickers Co, Montreal. She was laid down on 11 January 1915 and was commissioned on 3 June 1915. After commissioning she crossed the Atlantic from St. John's, Newfoundland to Gibraltar escorted by the armed merchant cruiser HMS Calgarian. She was accompanied by H1, H2 and H4. H3 was mined in the Gulf of Cattaro, Adriatic on 15 July 1916.
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.
HMS H7 was a British H-class submarine built by the Canadian Vickers Co, Montreal, Quebec, Canada. She was laid down on 19 May 1915 and was commissioned in June 1915. HMS H7 was sold in 1921. It had a complement of twenty-two crew members, a length of 171 feet (52 m), and a surfaced range of 1,600 nautical miles at 10 knots.
HMS H9 was a British H-class submarine built by the Canadian Vickers Co., Montreal. She was laid down on an unknown date and commissioned in June 1915. Launched by J. Grace Gardner at Montréal on 22 May 1915.
HMS H10 was a British H-class submarine built by the Canadian Vickers Co., Montreal. She was laid down on an unknown date and was commissioned in June 1915.
HMS H11 was a British H-class submarine built by Fore River Yard, Quincy, Massachusetts. She was laid down on an unknown date and was commissioned in 1915. H11 along with HMS H12 to HMS H20 were all built in America but were interned by the United States government until the United States entered World War I. H11 was sold on 20 October 1920 in Dover and lost on tow to the breaker's yard. The wreck was identified 2007.
HMS H12 was a British H-class submarine built by Fore River Yard, Quincy, Massachusetts. She was laid down on an unknown date and commissioned in 1915. HMS H12 along with HMS H11 and HMS H13 to HMS H20 were all built in America but were interned by the United States government until the United States entered World War I. HMS H12 was sold in April 1920 in Dover.
HMS H51 was a British H class submarine built by HM Dockyard, Pembroke Dock. She was laid down on an unknown date, launched on 15 November 1918 and commissioned into the British Royal Navy on 1 September 1919. It had a complement of twenty-two crew members.
HMS H50 was a British H class submarine built by William Beardmore and Company, Dalmuir. She was laid down on 23 January 1918 and was commissioned on 3 February 1920. She had a complement of 22 crew members. HMS H50 was one of seven ships to survive to the end of World War II. She was sold for scrapping in July 1945 in Troon.
HMS H48 was a British H class submarine built by William Beardmore and Company, Dalmuir. She was laid down on 30 November 1917 and was commissioned on 23 June 1919. It had a complement of twenty-two crew members. HMS H48 was sold on 30 August 1935 in Llanelly.
HMS H47 was a British H class submarine built by William Beardmore and Company, Dalmuir. She was laid down on 20 November 1917 and was commissioned on 25 February 1919. It had a complement of twenty-two crew members. HMS H47 was sunk in a collision with British L class submarine L12 off Milford Haven, Wales on 9 July 1929. Twenty one of the crew were lost with only three survivors.
HMS H34 was a British H class submarine built by Cammell Laird, Birkenhead. The vessel was laid down on 20 November 1917 and was commissioned on 10 September 1919. She had a complement of twenty-two crew members.
HMS H32 was a H-class submarine constructed for the Royal Navy. The submarine entered service in 1919 and served in the Second World War, one of only seven of the class to do so. During Warship Week 1942 H32 was adopted by Lydney RDC (Gloucestershire). The submarine was sold for scrap in 1944.
HMS H22 was a British H class submarine built by Vickers Limited, Barrow-in-Furness, as part of the Batch 3 H class submarines. She was launched on 14 November 1917 and was commissioned on 6 November 1918.
HMS H23 was a British H class submarine built by Vickers Limited, Barrow-in-Furness as part of the Batch-3 H class submarine. She was launched on 29 January 1918 and was commissioned on 25 May 1918. She had a complement of 22 crew members.
HMS H24 was a British H-class submarine built by Vickers Limited, Barrow-in-Furness, as part of the Batch 3 H-class submarines. She was launched on 14 November 1917 and was commissioned on 30 April 1918.
HMS H25 was a British H class submarine built by Vickers Limited, Barrow-in-Furness, as part of the Batch 3 H class submarines. She was launched on 27 April 1918 and was commissioned on 16 July 1918. It had a complement of twenty-two crew members.
HMS H26 was a British H class submarine built by Vickers Limited, Barrow-in-Furness, as part of the Batch 3 H class submarines. She was launched on 15 November 1917 and was commissioned on 29 December 1918. It had a complement of twenty-two crew members.
United Kingdom
