Depth is one of the core progression gates in Subnautica 2. Every vehicle and the player character have a crush depth -- the maximum depth they can safely reach before pressure begins dealing damage. Go past your crush depth and you start taking continuous hull or health damage that will eventually destroy your vehicle or kill you.
The player character starts with a limited safe depth tied to your diving suit. Without upgrades, you can only freedive to relatively shallow depths before oxygen and pressure become lethal. Vehicles extend your range dramatically: the Seamoth lets you reach mid-depths, the Prawn Suit handles extreme pressure, and large submarines can go very deep with the right upgrades.
Here is how crush depth manifests in gameplay:
- Within safe depth: No pressure damage. Explore freely.
- Slightly past crush depth: Slow continuous damage begins. You have a short window to retreat.
- Well past crush depth: Rapid damage that destroys vehicles or kills you in seconds.
- Vehicle warnings: Your vehicle AI announces when you exceed safe depth, giving you a chance to turn back.
Always watch your depth indicator when descending. The ocean floor of Subnautica 2 extends to extreme depths, and the most valuable resources and story content lie in the deepest, most dangerous zones. Progressing deeper is the central challenge of the game.
How Depth Limits and Crush Damage Work
Depth is one of the core progression gates in Subnautica 2. Every vehicle and the player character have a crush depth -- the maximum depth they can safely reach before pressure begins dealing damage. Go past your crush depth and you start taking continuous hull or health damage that will eventually destroy your vehicle or kill you.
The player character starts with a limited safe depth tied to your diving suit. Without upgrades, you can only freedive to relatively shallow depths before oxygen and pressure become lethal. Vehicles extend your range dramatically: the Seamoth lets you reach mid-depths, the Prawn Suit handles extreme pressure, and large submarines can go very deep with the right upgrades.
Here is how crush depth manifests in gameplay:
- Within safe depth: No pressure damage. Explore freely.
- Slightly past crush depth: Slow continuous damage begins. You have a short window to retreat.
- Well past crush depth: Rapid damage that destroys vehicles or kills you in seconds.
- Vehicle warnings: Your vehicle AI announces when you exceed safe depth, giving you a chance to turn back.
Always watch your depth indicator when descending. The ocean floor of Subnautica 2 extends to extreme depths, and the most valuable resources and story content lie in the deepest, most dangerous zones. Progressing deeper is the central challenge of the game.
How to Upgrade Your Depth Limit
To reach deeper biomes you must upgrade your vehicles and equipment. Each vehicle has a depth upgrade path that raises its crush depth, typically in tiers. You craft these upgrades at a Modification Station or a Moonpool using vehicle upgrade consoles.
Here is the upgrade progression for key vehicles:
| Vehicle | Base Depth | Depth Upgrade Tiers |
|---|---|---|
| Seamoth | ~200m | Tier 1, 2, 3 raise limit progressively |
| Prawn Suit | ~400m | Depth modules push it much deeper |
| Cyclops-class Sub | ~500m | Shield and depth upgrades for abyssal zones |
| Reinforced Dive Suit | Raises player safe depth | Crafted at Fabricator |
To craft depth upgrades you need the relevant blueprint, which you unlock by scanning fragments in wrecks and seabase ruins. Materials typically include titanium, lithium, and advanced components like plasteel or polyaniline for higher tiers. Build a Modification Station early so you can craft these critical upgrades.
The Reinforced Dive Suit is essential for solo diving. It increases your personal crush depth and reduces damage from creature attacks. Combine it with a high-capacity oxygen tank and you can safely explore depths that would kill an unprepared diver.
Upgrade incrementally. Do not rush to the deepest zone before your vehicle can handle it. Each depth tier unlocks new biomes, resources, and story content, so progressing one tier at a time ensures you are always equipped for the threats you will face.
Tips for Deep Diving Safely
Reaching extreme depth is only half the challenge; surviving down there requires planning. Deep zones are dark, cold, and populated by the game's most dangerous creatures. Here are the most important tips for safe deep dives:
- Bring extra power cells: Deep dives drain vehicle power. Carry charged spares so you are not stranded at depth.
- Equip sonar: Visibility is near zero in deep water. Sonar reveals terrain and creatures ahead.
- Install perimeter defense: The Seamoth defense pulse can stun attackers long enough to escape.
- Carry medkits: Always have healing items in case of creature attacks.
- Set a beacon at base: Navigate home by beacon, not by guessing, especially when disoriented at depth.
- Watch your oxygen: If diving without a vehicle, know your oxygen limits and plan round-trip time carefully.
- Know leviathan territories: The deepest zones are leviathan territory. Study their locations before descending.
In co-op, designate a vehicle operator who stays at a safe depth while others explore, ready to pick up divers or provide a quick escape. Communication about depth, oxygen, and threats keeps everyone alive during deep expeditions.
Remember that retreating is always an option. If your vehicle starts taking pressure damage or a leviathan appears, ascend immediately. The deep ocean rewards the prepared and punishes the reckless. Upgrade your gear, plan your dives, and you will conquer even the crushing depths of Subnautica 2's alien ocean.