HMS Fortitude

Two ships and a shore establishment of the Royal Navy have borne the name HMS Fortitude:

Ships
 * HMS Fortitude (1780) was a 74-gun third rate launched in 1780. She became a prison ship in 1795, a powder hulk in 1802, and was broken up in 1820.
 * HMS Fortitude was launched in 1807 as the 74-gun third-rate HMS Cumberland (1807). She became a prison ship in 1830, was renamed Fortitude in 1833, and was sold in 1870.

Shore establishments
 * HMS Fortitude (shore establishment) was the naval base at Ardrossan, commissioned in 1940 and paid off in 1945.
 * HMS Fortitude II was the Coastal Forces base at Ardrossan, commissioned in 1941. The base was on the navy list in 1944, but not in 1942.