Depth Levels

Depth is one of the main HUD indicators and is central to navigating the Seamoth, Cyclops, and Prawn Suit in Subnautica.

Depth also has an impact on Seabases: Hull Integrity is affected by adding a multiplier to base modules with a negative integrity, and Solar Panels become less effective in deeper waters.

Depth is currently only measured underwater - if the player's position is above sea level, the indicator will still show as 0 meters.

Around 3040 meters the world cuts off and gives way to the Crater Edge.

Player Depth
Currently, the player can go to greater depths than the crush depth of their vehicles without taking damage. However, the player depletes oxygen faster as they go deeper. For example, referring to the graph below, from 0m-99m the player will lose 1 oxygen every second. At the depth of 100m-199m the player loses 2 oxygen every second, and from 200m+ the player loses 3 oxygen every second. This is mitigated by equipping a Rebreather.

Crush Depth Stages
There are currently three stages of depth. The indicator will change color if it passes to another stage. Each stage affects vehicles in different ways.

When the vehicle is in the safe zone, the depth will be displayed in white text and will not normally take damage.

When it goes past the safety depth, the computer system will warn the player that they are leaving the safe zone, and the text will be in yellow. Bumping into solid objects can cause damage to the vehicle.

When the Cyclops goes past the crush depth, the computer system will warn the player that hull damage is imminent. The player then has a few seconds to turn back to avoid damage. In the Seamoth and Prawn Suit, the vehicle will take damage and start cracking. In the Cyclops, the hull will start to breach and the Cyclops' health will begin decreasing. The player then has to turn back to prevent further damage to the Cyclops.

It is possible to increase a vehicle's maximum depth using Upgrades.

Trivia

 * If the player swims past 500m in depth, they will start breathing faster, to reflect the pressure making it harder for them to breathe properly at this depth. This happens even with the Rebreather equipped, but doesn't affect oxygen usage (Assuming the Rebreather is equipped).
 * In older versions, the player's depth hud would display as the color yellow at 100m in depth, and it will turn red at 200m in depth. It would stay red past 200, even with a rebreather equipped.