Standard O₂ Tank (Subnautica)

The O2 Tank is a crafted piece of Equipment which boosts the player's Oxygen supply by 30 seconds.

The player can carry multiple O2 Tanks at a time in their inventory. Additional O2 Tanks carried in the player's inventory will extend your oxygen supply. The O2 Tank takes up four slots (2x2) in the player's Inventory.

By using the Modification Station the O2 Tank can be upgraded to High Capacity Tank or the lighter model, Plasteel Tank.