Learn how to unlock the Portable Oxygen Generator in Subnautica 2, where to find the fragments, how to craft it, and how to use it underwater.
Table of Contents
How to Unlock the Portable Oxygen Generator
The blueprint requires scanning two Portable Oxygen Generator fragments found inside the Great Jaw's core. One fragment sits just outside the central pod, and the other is inside the pod beneath a piece of Metal Salvage.
| Tip! | When entering the Great Jaw, avoid the purple rope-like tendrils inside the pod. Touching them causes the shell to snap shut and trap you. Scan both fragments carefully and exit before tripping the tendons. |
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How to Craft the Portable Oxygen Generator
| Station | Ingredients |
|---|---|
| Habitat Builder | Titanium x3 Lithium x2 |
The Portable Oxygen Generator also requires 1x Basic Battery to function. Keep a spare in your inventory so you can swap it out when it runs dry.
How to Use the Portable Oxygen Generator
You can carry the Portable Oxygen Generator just like a Portable Locker or leave it floating in place. The device recharges itself over time through electrolysis. When activated, it restores oxygen based on how much it has stored:
| Charge Level | Oxygen Restored |
|---|---|
| Fully charged | +15 oxygen |
| Partially charged | +5 oxygen |
| Tip! | The Portable Oxygen Generator is a supplement, not a replacement for Air Tanks. Pair it with a High Capacity Air Tank for longer dives. |
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Related Articles
Recommended Guides
 Walkthrough (Early to Late-Game) |  Plant Farming Guide |  Cooking and Recipes Guide |
 Best Biomods |  Best Tadpole Upgrades |  Metal Farm Guide |
| Progression & Priorities | ||
|---|---|---|
 Early Game |  Mid-Game |  Endgame |
Lists
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 Blackbox List |  Recipe Data Cards (Blueprints) |  Vehicle List |
 Buildings & Facilities List |  Best Base Locations |
Salt
Silver
Copper
Lead
Lucifer Rotsac
Conduit Crystals
Creature Enamel
Enameled Glass
Troilite
Celestine
Multiplayer Guide
How to Eat Food (Digestion)
How to Craft Items
Drinking Water Guide
How to Craft Air Tank?
How to Get Basic Fins
Scanner Station Guide
How to Manage Your Oxygen?
Base Guide
Alien Ruins
How to Use Coordinates
Tadpole Guide
How to Get More Storage
How to Get a Rebreather
Bioscanner Guide
Night Survival Guide
How to Heal
Angel Comb Guide
How to Power Your Base
How to Recharge Batteries and Tools
How to Get the Repair Tool
World Tree Guide
Flashlight Guide
Strong Acid Guide
How to Get Heat Tolerance
Scanner Guide
How to Get Tadpole Depth Module Mk. 2
How to Get a Wakemaker
How to Get Fibrous Pulp
Specs Requirements
New Game Features
Is There Crossplay?
Supported Devices
Update & Roadmap
How Long to Beat?
Can You Play Subnautica 2 on PS5 and PS4?
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