Convair Submersible Seaplane

Between 1962[1] and 1964,[2] the Navy granted a contract to Convair, a military aircraft arm of General Dynamics, to design and develop the vehicle, intended for anti-submarine warfare.

The craft's operational deployment would be to scout for enemy submarines from the air and, if any were detected, land on the water, submerge, and engage them underwater.

The craft was to have used ballast tanks to dive and surface, much as a conventional submarine does,[1] located in the wings and fuselage.

[2] For undersea operations, the turbojets would be sealed water-tight, and underwater propulsion would be provided by a battery-powered electric motor driving a propeller.

[2] Convair made detailed designs and built scale models which were tested, and averred that the craft would work, but the project did not get beyond that stage and was cancelled by Congress in 1965[2] or 1966.