|Coastal Defense Ship||Destroyer|
|Light Cruiser||Torpedo Cruiser|
|Heavy Cruiser||Training Cruiser|
|Aviation Cruiser||Fast Battleship|
|Light Carrier||Standard Carrier|
|Armored Carrier||Seaplane Tender|
|Submarine||Aircraft Carrying Submarine|
|Submarine Tender||Fleet Oiler|
|Repair Ship||Amphibious Assault Ship|
A progression in development of the F4U as a high-performance naval fighter, it was initially a land-based model that was thought to be difficult to be used on aircraft carriers. This improved fighter-bomber type later series was used in Task Forces, demonstrating it's multipurpose role, and long service as a fighter-bomber.
- In contrast to the F6F Hellcat, which quickly became the standard US Navy carrier-based fighter, the F4U Corsair primarily saw service with the United States Marine Corps from land bases, due to intially being deemed unfit for carrier landings. It wasn't until January 1945 that both Marine and Navy Corsair squadrons began being based on the decks of carriers.
- Built in parallel with the F4U-1C, but was introduced in April 1944. It had the new -8W water-injection engine. This change gave the aircraft up to 250 hp (190 kW) more power, which, in turn, increased performance. Speed was increased from 417 mph (671 km/h) to 425 mph (684 km/h). Due to the U.S. Navy's need for fighter-bombers, it had a payload of rockets double the -1A's, as well as twin-rack plumbing for an additional belly drop tank. These modifications necessitated the need for rocket tabs (attached to fully metal-plated underwing surfaces) and bomb pylons to be bolted onto the fighter, causing extra drag. The extra fuel carried by the two drop tanks would still allow the aircraft to fly relatively long missions despite the heavy, un-aerodynamic loads. A single piece "blown" clear-view canopy was adopted as standard equipment for the -1D model, and all later F4U production aircraft.