USAS American Mariner

(USAS American Mariner, originally commissioned as the SS George Calvert (build number 2007/MC Hull 20) should not be confused with the SS George Calvert (build number 2016/MC Hull 29) which was constructed shortly thereafter.) She appears to have been the only ship to have served in the U.S. Coast Guard, the U.S. Army, the U.S. Air Force, and the U.S. Navy after being built for service with the United States Merchant Marine.

USAS American Mariner

(USAS American Mariner, originally commissioned as the SS George Calvert (build number 2007/MC Hull 20) should not be confused with the SS George Calvert (build number 2016/MC Hull 29) which was constructed shortly thereafter.) She appears to have been the only ship to have served in the U.S. Coast Guard, the U.S. Army, the U.S. Air Force, and the U.S. Navy after being built for service with the United States Merchant Marine.