U.S. Navy and Marine Aircraft of World War II, Part 1: Dive and Torpedo Bombers [Repost]

When the Japanese attacked Pearl Harbor, two Navy squadrons and one Marine squadron were still equipped with the Curtiss SBC Helldiver. This would be the last American biplane to be assigned to front line combat units. (NMNA)
In 1922, the U. S. Navy converted the collier USS JUPITER to its first aircraft carrier and renamed the ship USS LANGLEY. Designated CV-1, LANGLEY became a test bed for the development of equipment, operating proce­dures, and aircraft that would be used on the subsequent air­craft carriers. Landing an aircraft on a moving ship was no easy task to start with, but once it touched down on the flight deck, the best way to bring it to a safe stop was even more difficult to determine. Not only did the Navy have to develop arresting gear, catapults, and aircraft elevators, among many other details and concepts, it had to decide what types of air­craft would be assigned to its air groups. At that time, the Navy believed that the aircraft would be used as scouts to search for threats beyond the visual range of the fleet. If a threat was located, it would certainly be in the form of enemy ships, so other aircraft had to be included in the carrier's air group to attack those ships. Finally, assuming that other navies would develop aircraft carriers, the Navy realized that fighter aircraft would be needed to protect the fleet from both shipboard and land-based aircraft.