HMS H32 was a British H class submarine built by Vickers Limited, Barrow-in-Furness. She was laid down on 20 April 1917 and was commissioned on 14 May 1919. Upon her commissioning, HMS H32 was assigned to be a tender to the submarine deport ship HMS Maidstone. She was also the first Royal Navy boat to be fitted with the ASDIC (Anti Submarine Detector Investigation Committee) underwater sensor system. HMS H32 was one of the seven H class submarines to survive until the end of World War II . HMS H32 was sold in Troon on 18 October 1944.