Its blueprint is found in a Data Box and is about 325-350m away from the Drop Pod between South and South West in the Twisty Bridges at a depth of about 120m. While equipped, it boosts the player's maximum Oxygen supply by 90 units for a total of 135 units. The High Capacity O₂ Tank is an upgrade to the Standard O₂ Tank that is crafted at the Fabricator.