Coast Guard One is the air traffic control call sign

Call sign

In broadcasting and radio communications, a call sign is a unique designation for a transmitting station. In North America they are used as names for broadcasting stations...

 of any United States Coast Guard

United States Coast Guard

The United States Coast Guard is a branch of the United States Armed Forces and one of the seven U.S. uniformed services. The Coast Guard is a maritime, military, multi-mission service unique among the military branches for having a maritime law enforcement mission and a federal regulatory agency...

 aircraft carrying the President of the United States

President of the United States

The President of the United States of America is the head of state and head of government of the United States. The president leads the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces....

. Similarly, any Coast Guard aircraft carrying the Vice President

Vice President of the United States

The Vice President of the United States is the holder of a public office created by the United States Constitution. The Vice President, together with the President of the United States, is indirectly elected by the people, through the Electoral College, to a four-year term...

 is designated Coast Guard Two.

, there has never been a Coast Guard One flight. Coast Guard Two was activated on September 25, 2009, when Vice President Joe Biden took a flight on CG 6019, an HH-60 Jayhawk

HH-60 Jayhawk

The Sikorsky HH-60J Jayhawk is a multi-mission, twin-engine, medium-range helicopter operated by the United States Coast Guard for search and rescue, law enforcement, military readiness and marine environmental protection missions...

 helicopter, over the recently flooded Atlanta area.

Other Executive travel

The Commandant of the Coast Guard

Commandant of the Coast Guard

The Commandant of the United States Coast Guard is the highest ranking member of the United States Coast Guard. The Commandant is normally the only four-star Admiral in the Coast Guard and is appointed for a four-year term by the President of the United States upon confirmation by the United...

 often travels aboard a Gulfstream C-37A

Gulfstream V

The Gulfstream V is a business jet aircraft produced by Gulfstream Aerospace. It is also used by the US military under the designation C-37A. The G500 and G550 are improved versions which are currently in production...

aircraft whose standard callsign is "Coast Guard Zero One." The aircraft is stationed at USCG Air Station Washington, D.C.