Check out this How to Manage Oxygen guide for Subnautica 2. This guide includes how to manage and upgrade your oxygen, details on the standard air tank, using natural air sources, vehicles, and how to upgrade your air tank!
Table of Contents
How to Manage Your Oxygen
Utilize Natural Oxygen Sources

When you first start the game, using natural air sources is the most efficient way to stay underwater. If you notice your oxygen meter is running low while diving, head back to the surface immediately to catch your breath and refill your oxygen.
Craft a Standard Air Tank at the Lifepod

Once you have used a natural air source to stay underwater, you can focus on gathering the materials needed to build a Standard Air Tank. This essential upgrade allows you to dive much deeper and explore the ocean for longer periods.
| Materials | Amount |
|---|---|
| Titanium | x2 |
| Rubber | x1 |
| Silver | x2 |
Create a Vehicle

Building a vehicle is also highly recommended, as it automatically refills your oxygen the moment you step inside. Having your own transport also allows you to travel faster and explore the deepest parts of the ocean with ease.
How to Unlock & Upgrade the Oxygen
No Need for a Blueprint for the Standard Air Tank
You don't need a blueprint to craft the Standard Air Tank. Since the recipe is already available in your Lifepod's Fabricator, you can focus on using natural air sources until you gather the materials needed to craft it.
Upgrade Your Oxygen by Crafting
Locate Blueprints in Data Boxes
To upgrade your air supply, you must first find the blueprint for the High Capacity Tank. These blueprints are usually hidden inside Data Boxes found within shipwrecks or abandoned bases. After you secure the blueprint, you can build the upgrade at a Modification Station.