Found and Explained Official on MSN

This Aircraft Carrier Could Go Underwater... Impossible Submarine Aircraft Carrier - An 1 + An 2

The concept of a submarine aircraft carrier promised the stealth of a sub with the striking power of an aircraft carrier.
Found and Explained Official on MSN

This Plane Could Fly Underwater...

"INCREDIBLE Submarine Plane - Convair Submerging Seaplane In 1962... the US navy had a submarine problem. Unknown threats ...