Coast Guard One - C-20 Gulfstream III

Coast Guard One is the air traffic control callsign of any United States Coast Guard aircraft carrying the President of the United States. As of 2007, there has never been a Coast Guard One flight.
The Gulfstream II is a large twin engine business jet built by Gulfstream Aerospace, and its US military designation is C-11 Gulfstream II. It has been succeeded by the C-20 Gulfstream III.
The Gulfstream III, a business jet produced by Gulfstream Aerospace, is an all-weather, long-range, high speed aircraft powered by two Rolls-Royce Spey turbofan engines with thrust reversers.
The Commandant of the Coast Guard and the U.S. Secretary of Homeland Security often travel aboard a Grumman VC-11A[1] aircraft commonly referred to as “Coast Guard One.”The aircraft is stationed at USCG Air Station, Arlington, Va.