In days of seafaring it was necessary to throw a line to shore or another vessel in order to tie a ship off, or send supplies to another ship. Sailors would do so by throwing a heaving line with a tied weight in the end usually consisting of a monkey’s fist.
In competition cadets as part of a four member team are given 4 tosses each, each toss can earn 10, 20, or 30 points. Missed targets score zero. Perfect score for a cadet is 120 points with the team scoring a possible 480 points.