It's usually pretty obvious how to build a base in a survival crafting game, but less so than you would've thought in Subnautica 2. In order to construct your underwater habitat and get out of the cramped Life Pod, you'll first need to unlock a specific tool called the Habitat Builder, and you do this by scanning two of them in a variety of locations around the map.
Once you have your Habitat Builder, you can construct your base wherever you want, large aquatic predators willing. Below I'll show you where to find two Habitat Builders and explain the basics of base building.
