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 pillar. Kirkland and his team do not inform the Navy about the pillar but start investigating it on their own after they find ancient script on the pillar. Though slow work, they eventually find the plane's black boxes, which are taken away by Spangler who subsequently orders Deep Fathom off the site. The writing is the same as that found by Karen Grace in the pyramid tunnel. She responds to the emails and decides to meet with Kirkland at Okinawa. Before Kirkland leaves, Spangler sets up two bombs to kill everyone but the one with Kirkland goes out of range