[w_over_w]

(Keep in mind, that ANY aircraft that contains the President, is Air Force One for that mission)

That's what I thought, but earlier today they were calling it Navy 1. Does it change with the branch providing the transport?

[NYFriend]

I believe XXXX One is the call sign of the aircraft carrying the Presidentm and not the technical name of a particular aircraft (though there are designated aircraft that are intended for transporting the President exclusively). There USAF has or had two planes intended for use as Air Force One, at the same time. Marines have several Helo's. It's the cargo that makes it "One". So it's Army One, Marine Corps One, Air Force One, Navy One. Maybe Coast Gaurd One, maybe only in wartime. Marine Corp and Airforce are generally the ones who transport.



VP is XXX Two.

[Captain Rhino]

I believe it does. When the President is embarked aboard a helicopter from HMX-1, the Marine Corps' presidential support squadron, the aircraft is referred to as "Marine 1."