Carrier onboard delivery

Carrier onboard delivery (COD) is the use of aircraft to ferry personnel, mail, supplies, and high-priority cargo, such as replacement parts, from shore bases to an aircraft carrier at sea. Several types of aircraft, including helicopters, have been used by navies in the COD role. The Grumman C-2 Greyhound has been the United States Navy's primary COD aircraft since the mid-1960s.

Early United States Navy (USN) recognition of need for a cargo plane capable of carrier landings resulted in airframe conversion of Grumman TBM-3 Avenger torpedo bombers to unarmed seven-passenger COD aircraft designated TBM-3R. Replacement of TBM-3Rs began in the late 1950s. Grumman built a cargo variant of its twin-piston-engined Grumman S-2 Tracker anti-submarine warfare bomber as the C-1A Trader. The Navy in 1963 briefly experimented with the C-130 Hercules for COD. In the late 1960s Grumman began production of a cargo variant of its twin-turboprop E-2 Hawkeye Airborne Early Warning aircraft known as the C-2A Greyhound. Five Lockheed US-3A Viking aircraft were also used from the early 1980s to the mid-1990s. The C-2 has remained the U.S. Navy's primary COD vehicle since that time.

Several U.S. Navy "Fleet Logistics Support Squadrons" provided COD services aboard carriers since the World War II, including VR-5, VR-21, VR-22, VR-23, VR-24, VRC-30, VRC-40, and VRC-50.

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