U.S. Centennial of Flight Commission home page
The U.S. Coast Guard and Navy have used the Piasecki "Dogship" (PV-3/HRP-1) as a rescue craft.

The U.S. Coast Guard and Navy have used the Piasecki "Dogship" (PV-3/HRP-1) as a rescue craft. It has ten seats and is powered by a 600 hp Pratt & Whitney R-1340 engine.

Credits - Helicopter History Site http://www.helis.com