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Oxygen upgrades: tanks, Air Bladders and the Rebreather

Quick answer

Craft a Standard Air Tank with 2 Titanium, 1 Rubber and 2 Silver. Carry an Air Bladder for emergency oxygen or ascent, and learn its controls before a deep trip. For deeper dives, scan one Rebreather fragment and craft it with 2 Fiber Mesh and 1 System Chip; it reduces oxygen use at depth.

How this guide was checked

Coverage: Early Access 1.2 · Buddy System Hotfix 2 (October 6) · official sources checked October 23, 2026 UTC · older routes retain their source/build limits. Research checked 8 Oct 2026. Updated 20 Sep 2026

This guide uses the linked sources and any attributed demonstrations. Platform differences and limitations are noted with the advice they affect.

See the 6 sources
6 sources
6 steps

Before you start

  • Two Lucifer Rotsacs make one Rubber.
  • Oxygen support does not remove vehicle crush-depth limits.
1

Check your oxygen return before collecting the next resource

Hotfix 1 corrects oxygen replenishment while attached to a Tadpole or Haul and adds an Air Bladder inhale hint. It also removes breath markers from Water Slugs held in inventory. A carried slug is not a demonstrated oxygen refuge; use the oxygen indication in the world.

The starter-kit calculator covers the Standard Air Tank and Air Bladder only. Rebreather components, vehicle power, food and water are additional preparation.

  1. Identify the oxygen point you intend to return to before moving into a cave or wreck. The route back matters as much as the distance shown by a signal.
  2. Refill, then practise the Air Bladder action in open water close to that return point. Read the current input hint; inhale and ascent are different uses.
  3. Watch the available oxygen during the outward trip. Turn back earlier when the return includes a detour, obstruction or unfamiliar passage; there is no single safe countdown for every dive.
  4. If relying on vehicle attachment for oxygen, check that your oxygen actually replenishes before leaving other cover. Keep a way back if it does not.
Sources for this section
2

Choose the immediate upgrade

ItemIngredientsPurpose
Standard Air Tank2 Titanium · 1 Rubber · 2 SilverIncreases the available oxygen supply.
Air Bladder2 Titanium · 1 RubberEmergency inhale or rapid ascent; refills when oxygen refills.
Sources for this section
3

Use oxygen points deliberately

Oxygen Tunics release bubbles. Bloom Sap can block oxygen funnels; cut the blockage with the Multitool. At the Welcome Center, a Basic Battery powers access to the Biolab, where Oxygen Control reduces consumption while still.

For the High Capacity Air Tank, find its recipe card in the deeper southwest colony ruin, scan the Processor there and collect Lithium. The upgrade combines a Standard Air Tank with a Plasteel Ingot; make that ingot from 2 Titanium and 1 Lithium. Build the required base facilities first.

Sources for this section
4

Scan one Rebreather fragment

The Rebreather reduces oxygen consumption in deeper water without increasing tank capacity. Keep your tank and plan a return to oxygen; no fixed extra dive time is assumed here.

Bring a charged Scanner. GameSpot places one fragment roughly 320 metres south-southeast of the Lifepod: pass the Welcome Center, look for the stone pillars near the Chap blackbox objective, then search the nearby debris and crates. Scan the fragment to unlock the blueprint; one scan is enough.

This is a published landmark route, not a Kingy gameplay recording. Treat the distance as approximate and turn back if your oxygen reserve is running low.

Sources for this section
5

Craft it at your base

GameSpot and GamesRadar agree on the finished recipe below. Prepare a full Fabricator and a powered Processor for the component chain. The Fabricator and Processor guide linked below covers station construction and Strong Acid production.

ItemFinished componentsPreparation
Rebreather2 Fiber Mesh · 1 System ChipUnlock with one fragment scan; craft at the full Fabricator.
Fiber Mesh2 Fiber · 1 Strong AcidPC Gamer lists this per mesh; make Strong Acid in the Processor.
Sources for this section
6

Check the ingredient totals in your recipe panel

Published raw shopping lists conflict. GamesRadar’s Rebreather guide lists 2 Cysts for the whole item, while its Strong Acid guide calls for 4 Necrolei Cysts to produce the two bottles used for the Rebreather. The finished requirement of 2 Fiber Mesh and 1 System Chip agrees across the Rebreather guides.

Follow the component quantities shown in your current Fabricator and Processor before gathering a full shopping list. Kingy retains the two-Cyst Strong Acid recipe in the crafting guide but does not present a settled raw-material total for the Rebreather. These recipes were checked against published guides and released update notes; Kingy has not independently tested this craft in the current build.

Sources for this section

You’re ready when…

Your checklist

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Sources · 6Official · Walkthrough · checked 8 Oct 2026 · Research checked 8 Oct 2026
Buddy System Hotfix 1 ↗Save compatibility, oxygen and inventory-sharing fixes.Official ·
Oxygen upgrades ↗Standard tank, Air Bladder and Oxygen Control.Walkthrough ·
Processor construction and Strong Acid ↗Processor recipe and interior scan directions; Necrolei harvesting and Strong Acid inputs. No storage-pull radius adopted.Walkthrough ·
Strong Acid from Necrolei Cysts ↗Corroborates a powered Processor and two Necrolei Cysts per Strong Acid. Excludes unrelated Rebreather shopping totals.Walkthrough ·
Rebreather fragment locations and finished recipe ↗One-fragment unlock, attributed south-southeast landmark route and two-Mesh/one-Chip recipe. No exact oxygen multiplier adopted.Walkthrough ·
Rebreather recipe and station requirements ↗Corroborates finished components and full Fabricator/Processor requirement. Its two-Cyst shopping list conflicts with the Strong Acid article; no flattened raw total adopted.Walkthrough ·

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