Fathom Fathom A fathom is a unit of length in the imperial and the U.S. customary systems equal to , used especially for measuring the depth of water. There are two yards (6 feet) in an imperial fathom. Originally the span of a man's outstretched arms, the size of a fathom has varied slightly depending on whether it was defined as a thousandth of an (Admiralty) nautical mile or as a multiple of the imperial yard. Formerly, the term was used for any of several units of length varying around . The name derives from the Old English word "fæðm", cognate
Fathom (film) good fun" and said, "Somewhere between her unfortunate arrival in the revival of 'One Million Years B.C.' and the new film...Miss Welch has learned to act." Fathom (film) Fathom Harvill (Welch) is a skydiver touring Europe with a U.S. parachute team. She is approached by a Scottish agent to recover an atomic triggering mechanism. The film was based on Larry Forrester's second "Fathom" novel "Fathom Heavensent", then in the draft stage but never published. His first was 1967's "A Girl Called Fathom". This was one of three 1967 20th Century Fox films about female spies, the others being Doris Day's