HMS Stubborn was a S-class submarine of the Royal Navy, and part of the Third Group built of that class. She was built by Cammell Laird and launched on 11 November 1942. So far she has been the only ship of the Royal Navy to bear the name Stubborn.  Stubborn survived the Second World War and was sunk on 30 April 1946 as an ASDIC target off Malta. The wreck is located about 3 nautical miles north-east of St Paul’s Bay and sits upright at a depth of 57 metres.