Video walkthrough
Watch the route, then match the frames
Video chapters
4 stepsVideo references
Watch or inspect the route before you dive
Click YouTube cards to load the player. Open frame cards to compare local screenshot notes. Use the evidence to confirm landmarks, movement, and encounter pacing, then follow the written checklist below.
High Capacity Oxygen Tank route reference
Watch for: Oxygen upgrade timing, early route blockers, turn-back discipline, and when to retest a known route.
Oxygen blocker frame review
Watch for: Start with High Capacity Oxygen Tank route / Oxygen upgrade at 00:18. Compare the screenshot cue, route note, and player action before following the guide in-game.
Safe return frame review
Watch for: Start with High Capacity Oxygen Tank route / Oxygen upgrade at 01:56. Compare the screenshot cue, route note, and player action before following the guide in-game.
Video watch notes
What to pause, compare, and write down
Do not watch the video like entertainment only. Use these notes as a second-screen checklist: pause on landmarks, confirm the player action, then return to the written route.
Watchlist
Pause on Tank route and identify the landmark, depth band, or objective state before following the next step.
Use Oxygen blocker to confirm what changed; if the video only shows a close-up, rebuild the route from the previous landmark.
Treat Safe return as the exit rule: finish the objective, return, and update storage or crafting before adding side goals.
Tank route
The tank route matters when oxygen is the blocker, not after panic already starts.
Action: Confirm oxygen is the blocker before chasing deeper signals.
Oxygen blocker
Name the route that needs more oxygen before chasing the upgrade.
Action: Follow the tank route and check blueprint or unlock progress.
Safe return
Retest one familiar route so the new turn-back timing becomes predictable.
Action: Craft the tank before starting another objective chain.
Video route timeline
Turn the video into playable checkpoints
Use this section like a second-screen route sheet. Open each checkpoint, compare the frame, do the action, then stop if your route no longer matches the video evidence. It keeps the guide useful even when Early Access shifts small placements or creature behavior.
00:58Checkpoint 1: Confirm oxygen is the blocker before chasing deeper signals.The tank route matters when oxygen is the blocker, not after panic already starts.Expand
Tank route
The tank route matters when oxygen is the blocker, not after panic already starts.
Player action
Confirm oxygen is the blocker before chasing deeper signals.
Proof before moving on
The tank route matters when oxygen is the blocker, not after panic already starts.
Watch this timestampIf this fails
Reset to the last confirmed landmark or objective state, then repeat only the route-critical step.
00:18Checkpoint 2: Follow the tank route and check blueprint or unlock progress.Name the route that needs more oxygen before chasing the upgrade.Expand
Oxygen blocker
Name the route that needs more oxygen before chasing the upgrade.
Player action
Follow the tank route and check blueprint or unlock progress.
Proof before moving on
Name the route that needs more oxygen before chasing the upgrade.
Watch this timestampIf this fails
Use the video frame as evidence, but record entry, proof, and exit as separate notes.
01:56Checkpoint 3: Craft the tank before starting another objective chain.Retest one familiar route so the new turn-back timing becomes predictable.Expand
Safe return
Retest one familiar route so the new turn-back timing becomes predictable.
Player action
Craft the tank before starting another objective chain.
Proof before moving on
Retest one familiar route so the new turn-back timing becomes predictable.
Watch this timestampIf this fails
Return, craft, sort storage, or retest the route before turning this page into a longer objective chain.
00:58Checkpoint 4: Retest a familiar material route to learn the new turn-back timing.The tank route matters when oxygen is the blocker, not after panic already starts.Expand
Tank route
The tank route matters when oxygen is the blocker, not after panic already starts.
Player action
Retest a familiar material route to learn the new turn-back timing.
Proof before moving on
The tank route matters when oxygen is the blocker, not after panic already starts.
Watch this timestampIf this fails
Reset to the last confirmed landmark or objective state, then repeat only the route-critical step.
Gameplay evidence
Screenshots to match before you keep swimming
Use these frames as visual checkpoints. If the terrain, lighting, or landmark does not match, slow down and re-check the route instead of forcing the next step.
Tank route
The tank route matters when oxygen is the blocker, not after panic already starts.
Oxygen blocker
Name the route that needs more oxygen before chasing the upgrade.
Safe return
Retest one familiar route so the new turn-back timing becomes predictable.
Route decision lab
Decide if this route is worth running now
This section turns the video into a practical in-game decision. Use it before leaving base, after the first landmark, and again before entering a deeper or darker area.
Route purpose
Prioritize the High Capacity Oxygen Tank when oxygen is the route blocker. Scan or unlock the tank, craft it immediately, then retest one known route before pushing into deeper objectives.
Visual checkpoint
The tank route matters when oxygen is the blocker, not after panic already starts.
Map anchor
High Capacity Oxygen Tank Anchor in Starter upgrade route. Use it for use this when oxygen is blocking material, scan, or old habitat route attempts.
Abort rule
Using the extra oxygen to wander without a route goal.
Field manual translation
Prioritize the High Capacity Oxygen Tank when oxygen is the route blocker. Scan or unlock the tank, craft it immediately, then retest one known route before pushing into deeper objectives. Use this completion route manual as a second-screen checklist: identify the entry condition, confirm the objective with a visual proof point, then stop when the return rule is met. This keeps the article practical for Early Access patches without pretending every coordinate or state is final.
Primary job
Oxygen tank - Confirm oxygen is the blocker before chasing deeper signals.
Best entry habit
Scanner route - Follow the tank route and check blueprint or unlock progress.
Stop condition
Using the extra oxygen to wander without a route goal. - Craft the tank before starting another objective chain.
Patch-safe reading
Exact item positions can shift during Early Access. The useful part of this page is the route logic: what to prepare, what visual cue to confirm, what objective to finish, and when to turn back.
Updated
2026-06-12 / field-tested / Early Access
What this guide covers
Requirements
- Scanner route
- Recipe materials
- Known test dive
Use this if
You want a route you can follow from video evidence without needing exact official coordinates. The screenshots and steps are written to help you recognize areas, landmarks, and decisions while playing.
Early Access can move details. Treat this as a video-based walkthrough and verify landmarks in your own build.
Step-by-step walkthrough
Follow the video route without guessing
Confirm oxygen is the blocker before chasing deeper signals.
Use this step as a route checkpoint, not as a promise that every object spawns in one exact coordinate. Match the landmark, compare the screenshot, then continue only if the return path is still clear.
If your game build looks different, stay with the same decision: keep oxygen safe, scan or collect the current blocker, and return before pushing into the next unknown area.
The tank route matters when oxygen is the blocker, not after panic already starts.
Follow the tank route and check blueprint or unlock progress.
Use this step as a route checkpoint, not as a promise that every object spawns in one exact coordinate. Match the landmark, compare the screenshot, then continue only if the return path is still clear.
If your game build looks different, stay with the same decision: keep oxygen safe, scan or collect the current blocker, and return before pushing into the next unknown area.
Name the route that needs more oxygen before chasing the upgrade.
Craft the tank before starting another objective chain.
Use this step as a route checkpoint, not as a promise that every object spawns in one exact coordinate. Match the landmark, compare the screenshot, then continue only if the return path is still clear.
If your game build looks different, stay with the same decision: keep oxygen safe, scan or collect the current blocker, and return before pushing into the next unknown area.
Retest one familiar route so the new turn-back timing becomes predictable.
Retest a familiar material route to learn the new turn-back timing.
Use this step as a route checkpoint, not as a promise that every object spawns in one exact coordinate. Match the landmark, compare the screenshot, then continue only if the return path is still clear.
If your game build looks different, stay with the same decision: keep oxygen safe, scan or collect the current blocker, and return before pushing into the next unknown area.
The tank route matters when oxygen is the blocker, not after panic already starts.
After-action plan
What to do after the guide works
Bank the result
Retest a familiar material route to learn the new turn-back timing.
Clean the inventory
Move route-critical materials into labeled storage so the next dive starts with empty space and a clear job.
Pick the next guide
Survival habits for oxygen timers, inventory pressure, food, water, and route discipline in Subnautica 2.
Next route queue
Use these as the next blockers to solve after this route. Each queue card keeps the same evidence style: source video, gameplay frames, and a written checklist.
Best immediate follow-upOxygen and Survival Tips
Survival habits for oxygen timers, inventory pressure, food, water, and route discipline in Subnautica 2.
Use if the route branchesRebreather Fragment Guide
A Rebreather route guide for scan checkpoints, oxygen pressure, depth planning, and safe return timing before deeper objectives.
Save for the next diveSubnautica 2 Beginner Guide
A practical first-session route for oxygen, tools, scanning, shelter, and safe exploration in Subnautica 2 Early Access.
Detailed notes
oxygen upgrade route plan
High Capacity Oxygen Tank Guide is useful when the route is treated as a focused job instead of a full-map sweep. Start by naming the blocker, checking the loadout, and matching the first landmark before copying the video. The player goal is not to memorize every second of movement; it is to understand why the route begins there, what proves progress, and when the route should stop.
Route type: oxygen upgrade
Proof to confirm: tank unlock or crafted oxygen upgrade
Primary blocker: Scanner route
Best follow-up: Retest a familiar material route to learn the new turn-back timing.
How to use this in-game
Turn this note into one action before leaving base: decide the objective, keep only the materials or tools that support it, then stop the route once the scan, pickup, or landmark is confirmed. This keeps the guide useful even when Early Access patches move small details.
How to use the video evidence
Watch for the entry frame, the proof frame, and the exit frame. The entry frame tells you whether you are in the right terrain band. The proof frame tells you whether the scan, pickup, blueprint, puzzle state, or build decision actually happened. The exit frame protects the run from turning into a panic search after the objective is already solved.
Entry frame: match terrain before diving deeper
Proof frame: confirm tank unlock or crafted oxygen upgrade
Exit frame: return before adding side goals
How to use this in-game
Turn this note into one action before leaving base: decide the objective, keep only the materials or tools that support it, then stop the route once the scan, pickup, or landmark is confirmed. This keeps the guide useful even when Early Access patches move small details.
Stop rule
Stop after the tank is crafted and tested on one familiar route; do not spend the new oxygen margin on blind exploration immediately. If the route fails, change one variable before trying again: bring the missing tool, empty inventory, approach from a clearer landmark, or wait until oxygen, vehicle depth, or defensive options match the route. That makes the next attempt safer and gives the page useful field notes instead of repeated guesswork.
How to use this in-game
Turn this note into one action before leaving base: decide the objective, keep only the materials or tools that support it, then stop the route once the scan, pickup, or landmark is confirmed. This keeps the guide useful even when Early Access patches move small details.
Video route notes
High Capacity Oxygen Tank Guide should be followed as a completion route, not as a memory test. Start by watching the first route movement and naming the entry condition before copying the path in-game. Confirm oxygen is the blocker before chasing deeper signals. Then pause again when the video reaches the first visible proof point, because that is where the guide changes from general advice into an action you can repeat. Follow the tank route and check blueprint or unlock progress. If the route starts to feel different in your build, keep the same player goal: finish the unlock cleanly and know whether a return trip is needed.
Entry check: Scanner route
Route action: Confirm oxygen is the blocker before chasing deeper signals.
Proof to look for: scan or pickup proof
Version note: Early Access / field-tested
How to use this in-game
Turn this note into one action before leaving base: decide the objective, keep only the materials or tools that support it, then stop the route once the scan, pickup, or landmark is confirmed. This keeps the guide useful even when Early Access patches move small details.
Screenshot checkpoints
Use screenshots as checkpoints instead of decoration. The first image should answer where the route begins, the second should show what confirms progress, and the third should explain what to do after the scan, pickup, puzzle state, or threat read is visible. Craft the tank before starting another objective chain. This is especially important in Early Access because exact positions can drift while landmarks, depth bands, room states, and player decisions stay useful. A good screenshot lets you say, "I am at the right kind of place," before you risk oxygen, storage space, or vehicle safety.
Entry frame: match the landmark before moving deeper
Proof frame: confirm scan or pickup proof
Exit frame: know the return direction before adding side goals
Loadout frame: check Recipe materials
How to use this in-game
Turn this note into one action before leaving base: decide the objective, keep only the materials or tools that support it, then stop the route once the scan, pickup, or landmark is confirmed. This keeps the guide useful even when Early Access patches move small details.
Stop rule and next dive
The most useful part of this page is the stop rule. Using the extra oxygen to wander without a route goal. Skipping the craft after unlocking the blueprint. When the objective is confirmed, return and convert it into progress: craft the upgrade, sort the material, save the route note, or mark the blocker as solved. If the route fails, do not repeat the same swim blindly. Change one variable at a time: enter from a clearer landmark, reduce inventory clutter, bring the missing tool, or wait until oxygen and vehicle support match the route. That turns a failed completion route into better field knowledge instead of another untracked cleanup sweep.
How to use this in-game
Turn this note into one action before leaving base: decide the objective, keep only the materials or tools that support it, then stop the route once the scan, pickup, or landmark is confirmed. This keeps the guide useful even when Early Access patches move small details.
Common mistakes
Using the extra oxygen to wander without a route goal.
Skipping the craft after unlocking the blueprint.
Pushing deeper before learning the new return margin.
FAQ
Is this guide for the current Subnautica 2 build?
This page is written for Early Access and includes a visible update date. Treat exact values as tracking notes until the current build is field-tested.
Does this page use official screenshots?
Pages combine attributed official Steam / Unknown Worlds media, local gameplay frame captures, and source-video evidence cards. New player-submitted captures should keep the route, timestamp, and build context attached.
Community notes
Add a field report
Player reports enter a moderation queue. Approved notes can load from Supabase; pending drafts stay visible in this browser for follow-up.
Near starter shallows
Approx. 70-120m from pod
Confirm oxygen before leaving the first landmark. The route is much safer when you mark the return path before collecting side materials.
Guide-wide
N/A
Creature patrol ranges and fragment placement can shift between builds, so treat exact distances as field estimates until multiple players confirm them.