Frederick Clowrey was born in Manchester, Lancashire in the 3rd Quarter of 1919 and is believed to have been the son of Frederick Peter and Annie Clowrey (née Meechin). It is not known when he joined the Royal Navy or when he joined HMS STOIC.

On 25 October 1944, he was onboard STOIC when a torpedo attack was made on a Japanese merchant vessel off the North coast of Java. The attack was unsuccessful, and the Commanding Officer (Lt. Peter Barnsley Marriott, DSO, RN) then surfaced for a gun action. Although several hits were made and the gun jammed at least once, the enemy counter attacked with gunfire and then attempted to ram. STOIC dived to safety but, unfortunately, the gun trainer, Frederick Clowrey, was then found to be missing. It was assumed that he had either drowned or had been taken prisoner.

Frederick Clowrey is commemorated on the Plymouth Naval Memorial on Panel 86, Column 1.