During the Second World War, due to the difficulty of passing convoys to Malta, submarines were used to run essential supplies to the island. Among those which contributed towards this hazardous task was HMS Olympus (N35), which unfortunately, in the early hours of 8th May 1942, few kilometers off the coast of Malta, is said that hit a mine and sunk.
HMS Olympus, an O- or Odin-Class submarine, was commissioned in 1930. This class submarine measured 86.5 meters length, 6.1 meters width and had a draft of 4.9 meters. Her displacement was 1,781 tons surfaced and 2,038 tons when submerged.
From 1931-1939 HMS Olympus formed part of the 4th Flotilla operating out of Hong Kong. After that she was with the 8th Flotilla, in Colombo, Ceylon (modern day Sri Lanka). In 1940 she was redeployed to the Mediterranean.