Coast Guard One is the call sign of any United States Coast Guard aircraft carrying the president of the United States. Similarly, any Coast Guard aircraft carrying the vice president is designated Coast Guard Two.[1]
As of 2024[update], there has never been a Coast Guard One flight. Coast Guard Two was activated on September 25, 2009, when then-Vice President Joe Biden took a flight on CG 6019, an HH-60 Jayhawk helicopter, over the recently flooded Atlanta area.[2][3]
faa-atc0204
was invoked but never defined (see the help page).