Ian Edward Fraser, was an English diving pioneer, sailor and recipient of the Victoria Cross, the highest award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces. Fraser was born in Ealing in Middlesex and went to school in High Wycombe. After initially working on merchant ships and serving in the Royal Naval Reserve, he joined the Royal Navy at the start of the Second World War. After being awarded the Distinguished Service Cross for actions while serving on submarines, he was placed in command of a midget submarine during an attack in Singapore codenamed Operation Struggle. For his bravery in navigating the mined waters, and successfully placing mines on a Japanese cruiser, Fraser was awarded the Victoria Cross.

HMS Sahib was a third-batch S-class submarine built for the Royal Navy during the Second World War. She was launched on 19 January 1942 and commissioned on 13 May 1942. She was the only British naval vessel to bear the name Sahib.