USS Dorado, a 1525-ton Gato class submarine, was built at Groton, Connecticut. Commissioned in late August 1943, she left nearby New London on 6 October of that year, en route to the Pacific by way of the Panama Canal. No further communications were received from Dorado, which was probably sunk on 12 October 1943 by a U.S. Navy patrol plane flying out of Guantanamo Bay, Cuba. If so, she was a victim of the kind of tragic mistaken identity that always menaced friendly submarines passing through waters that were also frequented by enemy undersea raiders.