During WWII, the US Navy had no purpose-built anti-submarine warfare aircraft, with pre-existing aircraft such as the Consolidated PBY Catalina flying boat and the Grumman TBF Avenger torpedo ...
In WWII, this role was carried out in the US Navy by the Consolidated PBY Catalina and the Grumman TBF Avenger ... by two Wright R-1820 Cyclone radial engines, and a crew of four.