The Moonpool is a useful tool in Subnautica for crafting and launching items. It can be used to:
• Craft vehicles such as the Seamoth and Cyclops.
• Launch items such as drop pods, signal buoys, and lifepods.
• Upgrade fabricator modules used in building vehicles.
It is located at the base of the Aurora near the Alien Containment facility and can be accessed by cycling through habitats with the Habitat Builder.