"Submarine Porpoise Took Petrol To Malta. 20 January 1943, Portsmouth, Hm Submarine Porpoise Returned To a British Base Recently, After 14 Months in the Mediterranean. She Played a Big Part in Keeping Malta Supplied With Cargoes of Vital Importance. She Was the First Submarine To Embark a Cargo of Petrol and Mines, and To Carry Out a Mine-laying Operation during Her Passage. She Made Several Trips, (represented by White Stripes on Her " P C S - Porpoise Carrier Service Flag")." The Coxswain , Chief Petty Officer C Ridley (centre), showing the Commanding Officer (left), Lt J M Steadman, RNVR (right), and Sub Lt C T M Thurlow, RNVR (standing behind), a model of the PORPOISE he made himself.