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Fathom, unit of measure |
A fathom is the name of a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. The name derives from the Old English word fathm (plural) meaning 'outstretched arms' which was the original definition of the unit's measure. In Middle English it was fathme. Its size can vary from system to system. The most commonly used fathom today is the international fathom. There are 2 yards or 6 feet in a fathom. Once also used for measuring distances on land, the fathom is now restricted to nautical uses, especially expressing the depth of water or the length of nautical rope or cable. Until early in the twentieth century, it was the unit used to measure the depth of mines in Cornwall, England. The verb "to fathom" means to measure the depth of something, especially using a sounding line. |
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