Subnautica 2 Portable Oxygen Generator Location Guide
Where to find the Portable Oxygen Generator in Subnautica 2: scan its blueprint at the Great Jaw, avoid the central tentacles, and use battery-powered oxygen safely.
Last updated: 2026-08-04
Quick answer: Find the Portable Oxygen Generator blueprint by scanning the devices in the central chamber of the Great Jaw. The tool uses battery power to generate breathable oxygen, giving you a sustained alternative to a one-use air refill.
Portable Oxygen Generator location: inside the Great Jaw
Enter the Great Jaw's central chamber and look for two scannable Portable Oxygen Generator devices. Early Access updates can move or change markers, so search the interactive map for the device name or Great Jaw before leaving base.
Before you enter
- Do not touch the central flesh and tentacles. If the Great Jaw closes, you can become trapped.
- Plan your path in and out. Do not keep mining or scanning inside when your oxygen margin is already low.
- Scan both devices first, then decide whether it is safe to stay for other resources.
What does the Portable Oxygen Generator do?
The Portable Oxygen Generator uses a battery to produce oxygen, making it a sustained option alongside air tanks. It does not replace depth preparation, a return route, or spare power on a deep run.
FAQ
Q: Where is the Portable Oxygen Generator in Subnautica 2?
A: Scan it in the Great Jaw's central chamber. Check the interactive map for the current marker before entering.
Q: How many Portable Oxygen Generator fragments do I need?
A: There are two scannable devices inside the Great Jaw. Scan both, then confirm the blueprint has unlocked.
Q: Why do I get trapped while scanning it?
A: You probably touched the central flesh or tentacles. Scan first and leave promptly rather than mining in the center.
Based on the current interactive-map and Early Access data. Recheck the in-game scan points after patches.
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