Olex is a Norwegian system for navigation, fishery plotting and ocean mapping. Olex makes everyone able to create their own high resolution seabed maps. The system collects data from the ships echosounder and GPS to a depth database on the Olex computer. The result is immediately visualized on the screen as a realistic 3D seabed view. The self-produced seabed maps can be shared between Olex users, and provides valuable information which may contribute in achieving a more efficient and profitable fishery.