Seabases (Subnautica)

Seabases are installations created by the player through the use of the Builder Tool. Many different modules are available to allow the creation of unique Seabases. One of their primary applications is to provide an area where the player can return for Oxygen and serve as an alternative to the Escape Pod as a base of operations. Seabases can be customized in the same way as the Cyclops through the installation of Lockers, Small Lockers, Fabricators, Fragment Analyzers, Specimen Analyzers, Benches, and Aquariums.

Hull Integrity

Hull Integrity refers the ability of your Seabase to withstand the pressure of the surrounding water. The majority of the Seabase modules will lower the integrity once added but the amount will vary by module. As Seabases are built at a greater depth the integrity reduction caused by each module will increase. Hull integrity can be increased by constructing Reinforcement panels, placing your Seabase on a Foundation, or installing Bulkheads.

When the hull integrity of a Seabase reaches zero, it will begin to form hull breaches. Any corridor or room that is connected to the breach will fill but Bulkheads allow the player to compartmentalize the base and prevent floodwaters from moving between compartments. However, if the integrity remains below zero then eventually every compartment will develop a leak and the base will fill completely with water. To avoid this, quickly increase the integrity and fix all hull breaches in the base using a Welder.

Energy Usage

Energy can be provided to a Seabase by building Solar Panels in the base immediate surroundings. Placeable Items such as the Fabricator will drain energy from the Solar Panels. The energy levels replenished during the daytime.

Seabases do not require energy to operate devices in Freedom Mode.

How to Build a Seabase

Find a suitable flat piece of land, or terraform the environment with the Terraformer.
Equip the builder, click the RMB to bring up a crafting menu.
Select the desired module.
Look at the desired building place (the outline of the module will become green if the location is valid).
Adjust the rotation by pressing Q or E or by scrolling the mouse wheel.
Place the module by clicking the LMB.
Once placed, hold the LMB to finish the building process.
Go to Step 2 and repeat.

If you want to deconstruct a Seabase module, equip the builder and hold "E" while facing the module. The materials used to create the module will be returned to your Inventory.