How to get more oxygen
Improve oxygen by crafting better tanks, carrying Air Bladders, planning shorter loops, using safe vertical routes, and marking oxygen fallback points. The first oxygen upgrade is usually more valuable than another random resource run because it makes every future trip safer.
| Method | Use it when | Risk |
|---|---|---|
| Standard and high-capacity tanks | You are ready to extend normal dive time. | Requires material planning. |
| Air Bladder | You need emergency ascent or extra breath margin. | Consumes hotbar/inventory space. |
| Oxygen route markers | You are exploring caves or deeper corridors. | Needs discipline to turn back early. |
| Vehicle support | You are chaining deeper biomes. | Requires repair and power planning. |
Route rule
Turn back before half your oxygen is gone unless you already know the return path. New areas should be scouted, marked, and repeated before they become farming routes.