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THE BATTLE OF ATLANTIC, 1939-1945 (A 19718) A batman uses signal bats to guide the landing of a rocket-firing Fairey Swordfish of No. 816 Squadron Fleet Air Arm on board HMS TRACKER in the North Atlantic, September-October 1943. Note the rocket projectiles under the wings. Copyright: © IWM. Original Source: http://www.iwm.org.uk/collections/item/object/205186701