Standard O₂ Tank (Subnautica)

The O2 Tank is a crafted piece of Equipment which boosts the player's Oxygen supply by 60 seconds.

The player can carry multiple O2 Tanks at a time in their inventory however only the O2 Tank currently equipped in the Paperdoll UI will affect your oxygen level. The O2 Tanktakes 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.

When an O2 Tank is depleted it can be switched out for a new one.