

Once you have scanned two, you can return home to make the arm. Inside you'll find randomly spawned fragments, though we found ours most easily on the lower levels of the mine where the ore veins are. You should be able to drive your Seatruck to the entrance, park, and Seaglide in. The Koppa Mining Site is its own biome and also has hidden tunnels behind the metal protective wire that lead to the Purple Vents and Deep Purple Vents. You can also learn more about the biome in general on the Subnautica Biomes page. If you haven't found this area yet, check the Finding the Koppa Mining Site portion of the Walkthrough. Up to four Scanner Room Upgrade Modules can be applied at once.The best place to find Drill Arm Fragments, of which you will need two, is in the Koppa Mining Site. Upgrade Modules to the Scanner Room are placed in a panel inside the Scanner Room. The Prawn Suit has four slots for Upgrade Modules as well as two purple-colored slots specifically for arm upgrades. Upgrade Modules for the Prawn Suit are placed in a panel on its top left. Up to four Upgrade Modules can be applied at once. Upgrade Modules to the Seamoth are placed in a panel on the Seamoth's left side. Six Upgrade Modules can be applied at once.


Upgrade Modules for the Cyclops can be placed in the upgrade console found in the engine room of the Cyclops. In those cases, the base-level module is crafted at the mini-fabricators described above, but then improved individually at the Modification Station (not to be confused with the Vehicle Upgrade Console mentioned above). Note that a few upgrades are compatible with both the Seamoth and the Prawn Suit, and both the Seamoth, Prawn, and Cyclops Depth Modules are themselves upgradeable. Upgrade Modules for the Cyclops are crafted at the mini-fabricator in the Cyclops' engine room, Upgrade Modules for the Seamoth and Prawn Suit are crafted at the mini-fabricator in the Vehicle Upgrade Console (formerly referred to as the Vehicle Modification Station), and Upgrade Modules for the Scanner Room are crafted at the mini-fabricator in the Scanner Room.

Upgrade Modules are software drives that improve the Cyclops, Seamoth, Prawn Suit, and Scanner Room.
