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. H24 was rammed by HMS Vancouver (1917) in July 1922 badly damaging her conning tower. HMS H24 was sold on 4 May 1934 in Sunderland.

Design

Like all post-H20 British H-class submarines, H24 had a displacement of 423 LT at the surface and 510 LT while submerged. It had a total length of 171 ft, a beam of 15 ft, and a draught of 12 m. It contained a diesel engines providing a total power of 480 hp and two electric motors each providing 320 hp of power. The use of its electric motors made the submarine travel at 11 kn. It would normally carry 16.4 LT of fuel and had a maximum capacity of 18 LT. The submarine had a maximum surface speed of 13 kn and a submerged speed of 10.5 kn. Post-H20 British H-class submarines had ranges of 2985 nmi at speeds of 7.5 kn when surfaced. H24 was fitted with an anti-aircraft gun and four 21 in torpedo tubes. Its torpedo tubes were fitted to the bows and the submarine was loaded with eight 21-inch torpedoes. It is a Holland 602 type submarine but was designed to meet Royal Navy specifications. Its complement was twenty-two crew members.