How to get the high capacity air tank upgrade blueprint in Subnautica 2

After spending the opening 10 hours of Subnautica 2 Constantly looking for ways to replenish my oxygen supply, I was really happy to learn that there was one High capacity air tank upgrade not far from Lifepod. I know that the constant search for air is one of the most important elements of survival Subnautica 2, especially early in the match. Still, I have to say that the game is a lot more fun when you get some literal breathing space. For this purpose, this guide will show you how to find and craft the High Capacity Air Tank upgrade blueprint i Subnautica 2.

SUb2-Strong-Acid-Featured

Subnautica 2: How to get strong acid

Unlock the processor and collect Necrolei cysts to craft this advanced crafting material in Subnautica 2.

High Capacity Air Tank Manufacturing Overview – Subnautica 2

The High Capacity Air Tank (HCAT) is an upgrade to the standard air tank and a necessary item for venturing into the deeper waters of the mid to late game areas. It almost doubles the amount of available oxygen, taking the tanks up to 120 seconds.

  • Place: The data card is in wrecage about 290 meters southwest of Lifepod, very close to Great Jaw Clam Leviathan.
  • Depth: The entrance to the wreck is 87 meters down.
  • Recipe: Once you have collected the blueprint, you will need a standard manufactured air tank and a plastic ingot to create the high capacity air tank at a fully functional manufacturer.

Checklist for High Capacity Air Tank Needs:

Items needed

Item usage

Standard air tank

The standard air tank is used in the crafting recipe.

Lithium x1

You need a piece of lithium. Below I will show you an easy way to get a close HCAT blueprint.

Manufacturer

You must create your own Fabricator in a powered base to create HCAT.

Processor

A processor is required to create Plasteel Ingot.

Tadpole

Although not required, the Tadpole vehicle will help you navigate deeper water much more easily.

Location of high capacity air tank data card in Subnautica 2

Sub2-HCAT-Start Point Image via GameRant; Courtesy of Unknown Worlds Entertainment

Where can I find Blueprint for High Capacity Air Tanks in Subnautica 2?

The High capacity air tank stored on a data card, which means that you do not need to scan any objects in the wild. After collecting the data card, the blueprint will be added to your inventory to be created at your convenience.

To reach the data card, you can start from the Lifepod and face southwest. Although having a tadpole is always preferable, it is not necessary. Once you're prepared, you can basically go southwest in a straight line. If you have visited the Great Jaw Clam Leviathan, the directions will be exactly the same, as your objective is right before it.

Sub2-HCAT-Wreckage-Path-1 Image via GameRant; Courtesy of Unknown Worlds Entertainment

Quite quickly you reach the edge of the shallow area and the seabed becomes a sheer rock. From here, make sure you have a full tank of oxygen before making the final push to the wreck.

Subnautica-2-High-Capacity-Air-Tank-Oxygen-Tunic-Great-Jaw Image via GameRant; Courtesy of Unknown Worlds Entertainment

There is an oxygen tunic just past the wreckage, at the edge of the pit where the big jaw is. If you need air, go there and come back to the wreck.

HCAT Datacard Location:

Sub2-High-Capacity-Air-Tank-Location-1 Image via GameRant; Courtesy of Unknown Worlds Entertainment

You will notice that the wreck is on a slope and is resting on the edge of a cliff. The entrance is at the lower end. Enter the wreckage, then immediately turn left.

Sub2-HCAT-Data-Card-Location Image via GameRant; Courtesy of Unknown Worlds Entertainment

Inside, you'll see the High Capacity Air Tank Data Card box on a table, right next to the “Gemini” log.

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The Repair Tool is beneficial for maintaining your base and exploring destroyed bases, but it requires some advanced materials, which we have here.

Where can I get lithium for the plastic ingot?

Sub2-HCAT-Lithium-Location-1 Image via GameRant; Courtesy of Unknown Worlds Entertainment

To make the plastic ingot that you need when making the high capacity air tank, you need a piece of lithium. This is one of the rarest materials in the game, but you don't have to go far to get it.

Sub2-HCAT-Lithium-Location-2 Image via GameRant; Courtesy of Unknown Worlds Entertainment

Just outside the wreckage, look for a strange metal structure with a table in the middle. If you approach the table you will find a single lithium in a small coral shell.

Sub2-HCAT-Plasteel-Ingot-Recipe Image via GameRant; Courtesy of Unknown Worlds Entertainment

Go back to a processor and craft a plastic steel ingot with one lithium and two titanium. With that, go to your Fabricator and create a high capacity air tank.

Sub2-HCAT-Manufacturer-Recipe Image via GameRant; Courtesy of Unknown Worlds Entertainment

Want to create the best base in all of Proteus? Check out these guides to help you get started:

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