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. Each sonar ping drain 1% of the Seamoth's power each time it is used. To use it, click the left mouse button. There is a reload time before it can be used again. It can also reveal caves below the surface of the seabed, assisting in finding entrances into the aforementioned caves.
- Sonar (originally an acronym for SOund Navigation And Ranging) is a technique that uses sound propagation to navigate under the surface of the water. Two types of technology share the name "sonar": passive sonar is essentially listening for the sound made by vessels; active sonar is emitting pulses of sounds and listening for echoes, which this module for the Seamoth uses.