Technical and recreational divers use a Jon-Line to maintain a certain depth when ascent lines are crowded with other divers or when the current is ripping. The 78" (2 meter) of type IV high strength para-cord line easily clips onto an anchor line or down line and is also easy-to-remove. Stored inside a durable 1680D ballistic nylon pouch with a modified closure flap that allows Garvin hook to be stowed in the pouch.