Floating marker designed to mark fishing spots on the seabed. It is white or yellow for easy identification from the surface. The long white line guides the diver to the seabed to the place where he left the lead anchor. The central floating bouy, once free, goes up to the surface. It also has some useful cuts on the sides to lock the line, preventing it from continuing to unfold. Once the line is locked under the surface, it stays vertically on the point at the bottom.