After 10 hours of opening Subnautica 2 Constantly searching for ways to replenish our oxygen supply, Large capacity air tank upgrade It's not far from Lifepod. I know that the constant search for air is one of the main survival factors for living things. subnautica 2, Especially at the beginning of the game. Still, I have to say that the game is a lot more fun if it's literally given a little breathing room. To achieve this, this guide shows: How to Find and Craft High Capacity Air Tank Upgrade Blueprints Subnautica 2.

Subnautica 2: How to get Strong Acid
Unlock processors and collect Necrolei Cyst in Subnautica 2 to craft this advanced crafting material.
Overview of Building a Large Capacity Air Tank – Subnautica 2
The High Capacity Air Tank (HCAT) is an upgraded version of the standard air tank, required for entering deeper waters in mid to late game areas. The amount of available oxygen is almost doubled, taking up to 120 seconds in the tank.
- location: The data card is located at the following location. winThe wreck is located approximately 290 meters southwest of the Lifepod, very close to the Great Jaw Clam Leviathan.
- depth: The entrance to the wreckage is located 87 meters underground.
- recipe: After collecting the blueprints, you will need a crafted standard air tank and one plasteel ingot to create a high capacity air tank in a fully functional Fabricator.
High capacity air tanks require a checklist:
|
Items needed |
Item Purpose |
|---|---|
|
standard air tank |
A standard air tank is used in the recipe. |
|
Lithium x1 |
You will need a piece of lithium. Below we will show you how to easily get near HCAT blueprints. |
|
producer |
To build a HCAT, you will need to build your own Fabricator on a power base. |
|
processor |
A processor is required to create Plasteel Ingots. |
|
tadpole |
Although not required, a tadpole vehicle helps navigate deeper waters much easier. |
Subnautica 2's Large Capacity Air Tank Data Card Location
Where can I find the high capacity air tank blueprints for Subnautica 2?
that Large capacity air tank design There is no need to scan any object in the wild as it is stored on a data card. When you collect data cards, blueprints are added to your inventory for convenient crafting.
To reach the datacard, start from the Lifepod and head southwest. Having tadpoles is always desirable, but not required. When you're ready, you can basically head straight to the southwest. If you've visited Great Jaw Clam Leviathan, the direction will be exactly the same because the goal is right in front of you.
Pretty quickly, you reach the edge of the shallow area and the sea floor becomes a sheer cliff. Make sure your oxygen tank is full before making the final push through the wreckage here.
Past the wreckage, there is an Oxygen Tunic at the edge of the pit where the Great Jaw is. If you need air, go there and get it, then return to the wreckage.
HCAT Datacard Location:
The wreckage can be seen leaning over the edge of the cliff. The entrance is at the bottom. After entering the wreck, immediately turn left.
Inside, there is a large air tank datacard box on the table right next to the “Twins” log.

Subnautica 2: How to get repair tools
Repair tools are useful for maintaining your base and exploring destroyed bases, but they require the advanced materials found here.
Where can I get lithium for plasteel ingots?
You will need 1 Lithium Ingot to craft the Plasteel Ingot needed to craft the High Capacity Air Tank. This is one of the rarest materials in the game, but you don't have to go far to get it.
Just outside the wreckage, look for a strange metal structure with a table in the center. As you approach the table, you will find a small coral shell containing a single lithium.
Return to the Processor and use 1 Lithium and 2 Titanium to craft 1 Plasteel Ingot. Then go to the Fabricator and build a high capacity air tank.
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