B-17H search and rescue variant of the Flying Fortress showing additional radar and rescue boat. This B-17H of the 6th Emergency Rescue Squadron was photographed at Floridablanca Airfield, Luzon, Philippine Islands in June 1945. (U.S. Air Force Photo)
IIRC, those stayed in service for a considerable number of years after the war.
The droppable boat could be radio-controlled from the aircraft to steer it over to downed airmen in the water.
Dear Dad, Harold, served on those craft with the 6th ERS out of Luzon… I must thank you for sharing this info with us.