The twin-engined Ventura was used during the second World War II for long-range maritime and anti-submarine patrols. It was originally developed to satisfy the requirements of the Royal Air Force. Extensive modifications led to the Ventura II which, designated PV-1 found great interest within the U.S. Navy. It was also the first U.S. bomber to have all metal-sheet covered control surfaces. The two R 2800-31 Double Wasp engines each delivered an output of 2023 bhp.