Oxygen

Oxygen (O2) is a gas that is needed by the player to survive. When diving, the player uses a reserve of oxygen that diminishes over time. If the player runs out of oxygen, the player will start to take drowning damage.

The player's oxygen reserve automatically replenishes whenever they:

• Come out of the water
• Enter a powered vehicle

Oxygen is automatically produced within vehicles naturally, as long as they have energy. If they run out of power, no oxygen will be produced. Oxygen production itself costs no energy, only a powered state is required.

The HUD indicator for the player's oxygen supply is located on the bottom left of the screen. The player has a base reserve of 45 units of oxygen, which can be increased by equipping O2 tanks.

The depth at which the player dives affects the rate of oxygen consumption. When diving, the player consumes one unit per second plus one additional unit for every 32m under the water surface. This can be counteracted completely by equipping a Rebreather, which will cancel out all depth debuffs.