Fathom was upset and rose to the surface. A "shot", one of the forged lengths of chain joined by shackles to form an anchor cable, was usually 15 fathoms long (). A "shackle", a length of cable or chain equal to 12.5 fathoms or 75 feet. In 1949, the British navy redefined the shackle to be 15 fathoms. In Finland, fathom ("syli") is sometimes, albeit seldom, used as a maritime unit, of a nautical mile and of cable length. It is customary, when burying the dead, to bury the coffin at least to a depth of a fathom, or "six feet
Deep Fathom Deep Fathom Deep Fathom is a novel by James Rollins. Ex-Navy SEAL Jack Kirkland surfaces from an aborted underwater salvage mission to find the earth burning. Solar flares have triggered a series of gargantuan natural disasters. Earthquakes and hellfire rock the globe. Air Force One has vanished from the skies with America's president on board. Now, with the U.S. on the narrow brink of nuclear apocalypse, Kirkland must pilot his oceangoing exploration ship, "Deep Fathom", on a desperate mission miles below the ocean's surface. There devastating secrets await him - and a power an ancient civilization could not contain has