Patented by Stinger

The invention involves one or more radio markers being located on or buried in the seabed at a location where a geographical point requires to be retrieved. A typical area of application for such device may be seismic nodes placed on the seabed, picked up and replaced in exact the same position. Other application may be locations of buried objects in the seabed like cables or if one need to mark a “snail trail” for autonomous underwater vehicles. >>> link to patent espacenet database