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Both, prior to 1962, the individual US services had their own designations
systems. This led to confusion, so they developed a unified system. Prior to the change, this aircraft the AD-4NA and after it was the A-1D. If you're interested in other changes, check out http://www.designation-systems.net/u...ignations.html Rob -- Support www.HonorFlight.org Show a Vet that you remember. |
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