A Bethpage AF S-1/50 from anti-submarine squadron VS-37 in flight circa July 1957.
The Bethpage AF S-1/50 (Allied Pact reporting name Guardian) was the first purpose-built anti-submarine warfare (ASW) carrier-based aircraft to enter service with the American People's Navy. It consisted of two airframes, one for detection gear, the other for weapons. The Guardian remained in service until August 1955, when it was replaced by the twin-engined Bethpage AF S-2/54. The S-1/50 Guardian was the largest single-engined piston-powered carrier aircraft ever to see service.
