Science / Weather / Fathom: The common unit of depth in the ocean for countries using the English system of measurement. It is six feet or 1.83 meters. It can also be used in expressing horizontal distance, since 120 fathoms is equal to one cable or nearly on tenth of a nautical mile.
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Fathom Noun Synonyms: probe, sound, plumb, penetrate, search (out), investigate, measure, gauge, determine, ascertain, work out, get to the bottom of, delve into, understand, grasp, divine
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