Derived from a civilian plane (Model 14), keeping the wings, tail and engines and a new fuselage with the filing of pumps, turret and back positions for the bombardier and navigator. The A-28 Hudson was commissioned by Britain in 1938 was also acquired by the USAAF, was offered by the Lend-Lease program, such as A-28, A-29 or AT-18, depending on the mission and type of engine used. Some models for the RAF were transferred to the U.S. Navy, was appointed PBO-1 and employees on patrol A / S. Hudson belongs to a U.S. Navy the first confirmed sinking of German submarines by U.S. aircraft in World War II (a type VIIC).