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This article is about the Repair Tool in Subnautica. Click here for information on this subject in Below Zero.

The Repair Tool is a tool used to repair damage on vehicles, Seabases (Subnautica), Lifepod 5's Radio and the secondary systems, damaged doors in the Aurora and its drive core. It is powered with a Battery (Subnautica).


The Repair Tool is first used to repair the damaged panel to the left of the Fabricator (Subnautica) in Lifepod 5 and the Lifepod's Radio, which allows messages to be received (though not sent, as the protagonist is silent).

Afterwards, early on in the game while exploring Wrecks, there can sometimes be a damaged control panel usually identical to the one in Lifepod 5 for doors, which then allows for access or easier access to an interior. Later on, its main role is to replenish the health of the Seamoth, Prawn Suit (Subnautica), and Cyclops, and to fix holes in the hull of the Cyclops and most Seabase modules. It can also repair breaches that appear in the Aurora's generator room, thus causing the radiation to begin to dissipate.

As it comes with its own battery when fabricated, this can be an alternate way to make new batteries if Acid Mushrooms and Copper Ore (Subnautica) are not readily available.

If a Bleeder latches onto the player's arm, the player can use the Repair Tool to hit the Bleeder.


Silicone Rubber.pngCave Sulfur.pngTitanium.pngArrow-right (1).pngFabricator.pngArrow-right (1).pngRepair Tool.png

Uses in Crafting

Cyclops Upgrade Fabricator

Repair Tool.pngCopper Wire.pngArrow-right (1).pngCyclops Upgrade Console.pngArrow-right (1).pngCyclops Docking Bay Repair Module.png

Data Bank Entry


The repair tool can be targeted at any common device - control panels, habitat modules, radios etc. - to stitch wires and seams back together at the atomic level. All good technicians keep one of these under their pillow.

Most people don't care why it works, just that it saved their life that one time - but in case you're curious, it combines scanner and fabricator technologies to determine the proper specifications for the targeted object, and then rearranges the available physical material to match the original specs.

'The Alterra Repair Tool: Get your fix.'


Main article: Achievements
Spoiler alert: The following section contains story related material.
AuroraAchievement.jpg Extinction Event Avoided

Repair the Aurora's Drive Core

How to obtain: The player has to fix the breaches in the Aurora's drive core.



  • The idea for the Repair Tool may be taken from Natural Selection 2, where the Welder is used to repair various machinery, much like this one.
  • The original name for the Repair Tool was the Welder.
  • The Repair Tool doesn't require a battery in its recipe, yet spawns with one inside of it, creating batteries without any copper.
  • Unused animations from Trello suggests that the Repair Tool would have operated using consumable canisters of welding material, rather than batteries.[1]
  • In former versions of the game, a Repair Tool and a Diamond was used to create the Laser Cutter.