Subnautica 2 Oxygen Management — How to Get and Upgrade Air

How to Manage Your Oxygen

Utilize Natural Oxygen Sources

Using natural air sources to stay underwater

When you first start, use natural air sources to stay underwater. If your oxygen meter runs low, head back to the surface immediately.

Craft a Standard Air Tank

Crafting the Standard Air Tank at the Fabricator

Materials	Amount
Titanium	x2
Rubber	x1
Silver	x2

No blueprint needed — the recipe is already available in your Lifepod’s Fabricator.

Create a Vehicle

Vehicles automatically refill your oxygen

Building a vehicle automatically refills your oxygen when you step inside. Allows faster travel and deeper exploration.

How to Upgrade Oxygen

• No blueprint needed for Standard Air Tank
• High Capacity Tank blueprint found in Data Boxes at shipwrecks or abandoned bases
• Build upgrade at a Modification Station

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The Bottom Line: This is the kind of mechanic that seems obvious after you know it, but the game sure as hell won’t tell you upfront. I learned most of this the hard way — by drowning, starving, or getting eaten. The systems in Subnautica 2 are deep but fair. Once you understand how they work, survival stops being a struggle and starts being a strategy. And that’s when the real fun begins.