The Seamoth Sonar is an Seamoth Upgrade Module that assists in the player's efforts to navigate underwater. This is a dedicated system for detecting and displaying geographical data on the HUD. This allows the player to navigate easier at night, find their way out of complex cave systems and detect land masses before crashing into them. It can also reveal caves below the surface of the seabed and assist in finding entrances into them. The Sonar is activated with LMB. Each sonar ping drains 1% of the Seamoth's power each time it is used.