They are PBY's. Possibly being ferried home from the war. Many aircraft carriers steamed for home with empty decks and hangars. The planes were pushed over the side in the open sea. No ceremony, just disposed of. No longer needed for the war effort. Most of the WW2 planes still flying were used stateside for training. Some saw action in Korea before the F-86 Sabre jets took over. A single Corsair was credited with shooting down 2 enemy Mig 15 jets.