ADM 179/323 Reconnaissance report on operation "Postage Able", from Naval Commander Force J. HMS VECTIS, Cowes https://drive.google.com/folderview?id=0B8lMCrBUE08wfjA0ZmdQblZMTDZTR0ZZYzIzRUtWZ0VDTFh6NnNMd2xVQjhQVmRucFoxbGc&usp=sharing On January 16, 1944, HMS X20 planned to spend four days off the French coast. Commanded by Lt KR Hudspeth DSC* RANVR and Sub. Lt. B. Enzer RNVR, with the COPP (Combined Ops Pilotage Party) comprising Lt. Cdr. Nigel Willmott DSO DSC RN, and two divers, Major Scott-Bowden and Sergeant Ogden-Smith. During the daytime, periscope-level reconnaissance of the shoreline and echo-soundings were performed. Each night, X20 would approach the beach, and the divers would swim ashore to take soil samples. The divers went ashore on two nights to survey the beaches at Vierville-sur-Mer, Moulins St Laurent and Colleville-sur-Mer in what became the American Omaha Beach. On the third night, they were due to go ashore off the Orne Estuary (Sword Beach), but by this stage fatigue (the crew and divers had been living on little more than benzedrine tablets) and the worsening weather caused Hudspeth to shorten the operation, returning to HMS Dolphin on January 21, 1944.