The twin-engine F5L was one of the Felixstowe F series of flying boats developed by John Cyril Porte at the Seaplane Experimental Station, Felixstowe, England, during the First World War for production in America.
The first Naval Aircraft Factory F5L, 24 July 1918.
Aeromarine 75 Columbus flying over Bimini in the Bahamas, 1921.