AFO is Actually a Name
While many people believe that AFO refers to a single plane, it is a name. AFO refers to the plane on which the President is traveling. The President, on the other hand, does not always go by plane. When the President flies aboard an Army plane, it is known as Army One.
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And it’s called Marine One if he’s on a helicopter. Marine One is the radio call sign for the President’s helicopter, a Marine Corps chopper. The Marine One helicopters are equipped with ballistic armor and anti-missile defenses. Their pilots are known as the Nighthawks, and they are from Marine Helicopter Squadron One.