"Ones"

We've all heard of Air Force One. Many of us have heard of Marine One (the Marine helicopter that frequently transports the President via air instead of via an expensive motorcade). However, what about the other three branches of service?

Army One

Prior to 1976, responsibility for helicopter transportation of the President was split between the Army and the Marines, so "Army One" was a common occurrence. The most famous picture of Army One was when Nixon was leaving the White House after he resigned (his resignation was not yet submitted so he was still in fact the President).

Navy One

Navy One has only been used once, for my man Dubya. It was an S-3 Viking used to transport him from San Diego to an aircraft carrier off shore. No aircraft has ever been designated Navy Two, which would be used if the Vice President was on board.

Coast Guard One

Coast Guard One (as well as Two) has never been used. However, it would likely be a C-37A (the military version of the Gulfstream G550), as that is what the Commandant of the Coast Guard uses to travel.

And a bonus, Executive One
Executive One is the call sign designated to any civilian aircraft when the President is on board. It has only been used in that way once, when Nixon flew from Washington to LA on United to promote the safety and health of the domestic airlines. Hillary Clinton used commercial aircraft during Bubba's term, but she was not the President, so the flights were designated Executive One Foxtrot (for "family"). The Foxtrot designation is given for all of the Ones if the Presidential family is on board. Executive One was also given to Dubya's flight out of Washington after Obama was inaugurated, which appears below:



And if you don't know, now you know.