The aim is to manufacture a “black box” for divers. There is a need to communicate with and position divers in underwater environments. The project involves designing, manufacturing and selling a device that makes it possible to locate and attracting attention between divers. It is difficult for divers to communicate and locate each other, among other things, when Visibility is Reduced – Night Diving – Drift Diving – Needing Attention (e.g., low air supply) – Emergencies – Orientation. This leads to incidents, injuries and sometimes fatalities. The aim is to increase the safety and comfort of diving.