"[3] In 1944, at age 24, he became a lieutenant in the Royal Naval Reserve, and volunteered to serve on the 'X' craft midget submarine depot ship HMS Bonaventure from 7 November 1944 to July 1945.

On 31 July 1945 in the Straits of Johor between Singapore and Malaya, Lieutenant Fraser, in command of an improved X-boat, HMS XE-3, attacked the Japanese heavy cruiser Takao, after making a long and hazardous journey through mined waters.

Fraser slid the submarine under the Takao, which lay over a depression in the sea bed, and his diver Acting Leading Seaman James Joseph Magennis went out to fix the limpet mines to the bottom of the ship.

Lieutenant Fraser commanded His Majesty's Midget Submarine XE-3 in a successful attack on a Japanese heavy cruiser of the Atago class at her moorings in Johore Strait, Singapore, on 31st July, 1945.

During the long approach up the Singapore Straits XE-3 deliberately left the believed safe channel and entered mined waters to avoid suspected hydrophone posts.

Any man not possessed of his relentless determination to achieve his object in full, regardless of all consequences, would have dropped his side charge alongside the target instead of persisting until he had forced his submarine right under the cruiser.

The approach and withdrawal entailed a passage of 80 miles through water which had been mined by both the enemy and ourselves, past hydrophone positions, over loops and controlled minefields, and through an anti-submarine boom.His VC is on display in the Lord Ashcroft Gallery at the Imperial War Museum, London.

Using the show's takings, and with his younger brother Brian Fraser, he set up a commercial diving organisation called Universal Divers Ltd,[1] of which he was managing director from 1947 to 1965 and, since 1983 (as former chairman).