Subnautica Wiki
This article is about Seamoth Sonar. If this is not what you are looking for, see Upgrade Module (Disambiguation).

The Seamoth Sonar is a Seamoth Upgrade Module that can assist in the player's efforts to navigate underwater. It can help the player 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 Seamoth Sonar will also scan fauna. This can be useful in avoiding hostile fauna in dark or foggy biomes.

While in the Seamoth, the sonar can be turned on or off, by using the appropriate key assigned to the upgrade slot it sits in. In 'off mode', the sonar icon is greyed out, and it cannot be activated.

The sonar can be activated with LMB. Each sonar ping drains 2 Power or 1% of a normal Power Cell's energy from the Seamoth.

It is crafted with the mini-fabricator on the Vehicle Upgrade Console, which may be built in the Moonpool. The module must be placed in the Seamoth's upgrade panel to function.


Copper Wire.pngMagnetite.pngMagnetite.pngArrow-right (1).pngVehicle Upgrade Console.pngArrow-right (1).pngSeamoth Sonar.png



  • 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 is what this module for the Seamoth uses.