HMS Olympus was an Odin-class submarine, a class originally designed for the Royal Australian Navy to cope with long distance patrolling in Pacific waters.

On 9 November 1941 Olympus attacked the Italian merchant ship Mauro Croce (1,049 GRT) with torpedoes and gunfire in the Gulf of Genoa.

She had just left Malta on passage to Gibraltar with personnel including many of the crews of the submarines Pandora, P36 and P39 which had been sunk in air raids.

During the War Olympus was adopted by the Town of Peterborough as part of Warship Week.

The plaque from this adoption is held by the National Museum of the Royal Navy in Portsmouth.