fathom distance

A fathom is a nautical unit of length equal to 6 feet or 1.8288 metres.

It’s used mainly for water depth and anchor rode—because “three fathoms” sounds saltier than “about 5.5 metres”.

Sounders and charts may show fathoms or metres depending on settings, so confirm before you go full Captain Guesswork.

Key figures: 1 fathom = 2 yards = 6 feet = 72 inches = 1.8288 m. Consult official documentation for exact figures.