Device that does not obstruct the transit of vessels and does not come into contact with propellers because it does not remain on the surface. Connected at the end of moorings, it sinks with them upon release and rises to the surface upon command. Holds an automatic rope belt, which connects via a carabiner to the mooring line. Resurfaces thanks to the special magnetic device placed. Once hoisted aboard by retrieving its belt, we'll have the rope ready for mooring. No chargers needed as it relies on solar power thanks to its 4 high-efficiency solar cells. Equipped with a twilight sensor: activates its LED illuminators for night-time use.