Question: 1 shackle equals how many feet?
Answer: A shot, one of the forged lengths of chain joined by shackles to form an anchor cable, was usually 15 fathoms (90 ft; 27 m). A shackle, a length of cable or chain equal to 12 1⁄2 fathoms (75 ft; 22.9 m). In 1949, the British navy redefined the shackle to be 15 fathoms (90 ft; 27 m).