British Escort Carriers 1941-45 : Osprey Publishing : 9781472836250 : 1472836251 : 19 Sep 2019 : This is the fully-illustrated story of the Royal Navy's escort carriers which battled against deadly U-Boats during the Battle of the Atlantic, giving vital air cover to the convoys that kept Britain alive in World War II. In 1941, as the Battle of the Atlantic raged and ship losses mounted, the British Admiralty desperately tried to find ways to defeat the U-Boat threat to Britain's maritime lifeline. Facing a shortage of traditional aircraft carriers and shore-based aircraft, the Royal Navy, as a stopgap measure, converted merchant ships into small ?escort carriers.? These were later joined by a growing number of American-built escort carriers, sent as part of the Lend-Lease agreement. The typical Escort Carrier was small, slow and vulnerable, but it could carry about 18 aircraft, which gave the convoys a real chance to detect and sink dangerous U-Boats. Collectively, their contribution