Despite ripping currents and crowded ascent lines, you can hang on the line at a desired depth with Dive Rite's jon line. The jon line allows multiple divers to stay at the same depth on one line, and keeps you from being pulled up and down by a pitching and rolling boat in rough seas. This allows you to maintain a specific depth for decompression or safety stops, without losing contact with the line. It easily clips onto an anchor or down line, and just as easily unlocks from the line making depth changes effortless. The Jon Line with Carabiner contains { 5 ft | 1.5 m } of { 1 in | 2.5 cm } nylon webbing with a stainless steel carabiner and is stored in a handy dispenser that fits on any { 2 in | 5.1 cm } harness webbing.