SUBNAUTICA / EQUIPMENT

Ultra High Capacity Tank

An improved oxygen tank that enables longer dives on foot.

QUICK REFERENCEFirst SubnauticaReviewed 2026-10-28Reference / noindex
Original Volpedia schematic category illustration
OVERVIEW

Understanding Ultra High Capacity Tank

An improved oxygen tank that enables longer dives on foot.

This is an original reference for the first Subnautica. Your current depth rating, oxygen, available tools and navigation route determine when an objective is practical. Follow actual in-game PDA and Fabricator information for any values that vary by version.

PRACTICAL APPROACH

How to use this information

Upgrade only after securing materials and then plan return time using actual oxygen, not guesswork.

COMMON MISTAKES

What to avoid

Extra capacity can encourage dangerous cave exploration if orientation remains poor.

CONTINUE ON VOLPEDIA

Related topics and walkthroughs

EQUIPMENTBeacon

A deployable navigation marker that appears on the HUD after placement.

EQUIPMENTFlashlight

A battery-powered light useful when exploring dark wrecks and caves.

EQUIPMENTHabitat Builder

The handheld tool that places seabase structural components and furnishings.

EQUIPMENTLaser Cutter

A tool that opens sealed doors in some wrecks, permitting access to additional fragments and supplies.

EQUIPMENTPathfinder Tool

A device that leaves temporary route markers through confusing spaces.

EQUIPMENTPropulsion Cannon

A tool that manipulates nearby objects and can move obstructing debris.

EQUIPMENTRadiation Suit

Protective clothing needed for certain irradiated areas around the damaged Aurora.

Back to Equipment

Independent Volpedia editorial encyclopedia about the first Subnautica, reviewed 2026-10-28. Unaffiliated with Unknown Worlds Entertainment. Category illustrations are original diagrams, not in-game maps, screenshots or exact creature portraits. No fabricated damage statistics, spawn probabilities or detailed map coordinates. References are documented privately and not shown as outbound research buttons.