Start
After Basic Fins, Scanner, Portable Storage, and Basic Battery.
Route guide
Colonist Bunker 1 Silver Route
This route starts from the Angel Comb landmark, turns into the two-light cave, follows the black cable to early Silver, then continues to the red hatch for Colonist Bunker 1. The payoff is strong: Silver for Standard Air Tank, Repair Tool progress, S Shelf, Trashcan, and the BioBed quick-slot upgrade.
Quick answer: bring Scanner and a clean inventory, collect at least two Silver, scan the bunker objects, use the BioBed panel for the sixth quick slot, then craft Standard Air Tank from 2 Titanium, 2 Silver, and 1 Rubber for 75 oxygen.
Reviewed .
Heading
Angel Comb route, southwest 220 degrees, then west 270 degrees along the black cable.
Bunker entry
From the Silver cave oxygen point, face northwest around 330 degrees toward the red hatch.
Reward
Two Silver, Repair Tool progress, S Shelf, Trashcan, BioBed sixth quick slot, and 75 oxygen after crafting the tank.
Stop 01
Start from the Angel Comb landmark
Begin after Basic Fins, Scanner, Portable Storage, and a Basic Battery are handled. Face north-northeast around 30 degrees toward the Angel Comb route, surface first, and treat this as a focused Silver and bunker trip rather than a general exploration swim.
Stop 02
Turn southwest to the two-light cave
The two lights are the cleanest visual check for the first cave. Inside and near this cave, scan the Wakemaker and Beacon objects if you have oxygen margin, then pick up the Portable Storage and Copper Wire before following the next landmark.
Stop 03
Follow the black cable west
From the Portable Storage area, face west around 270 degrees. The black cable leads to the next cave opening, so use it instead of trying to memorize every rock shape. If oxygen is already uncomfortable, reset before entering the Silver section.
Stop 04
Confirm the green-lit Silver cave
After the black-cable entrance, look upward for the bright green plant glow. That landmark is your cue that the Silver route is correct. Descend carefully, pick up the Basic First Aid Kit, and keep your exit plan simple.
Stop 05
Collect two Silver and reset oxygen
The Standard Air Tank needs two Silver, so do not leave after only one piece. The cave also has Copper, but prioritize Silver first. If oxygen is tight, move to the nearby oxygen point, recover, then make a second pass.
Stop 06
Take the northwest passage to the red hatch
From the Silver cave after an oxygen reset, face northwest around 330 degrees. Stay compact and look for the red hatch in the mid-80 m depth range. If the tunnel stops matching this description, return to the oxygen point and line up the passage again.
Stop 07
Scan Colonist Bunker 1
Inside Colonist Bunker 1, scan the Repair Tool on the desk, the S Shelf on the wall, and the nearby Trashcan. The Repair Tool scan is progress, not the full unlock, so treat this bunker as the first repair-tool step and a base-decoration stop.
Stop 08
Use the BioBed, then craft the tank
Use the BioBed panel before leaving: the quick-slot bar expands from five slots to six. After that, exit the red hatch, take the route back carefully, and craft the Standard Air Tank from 2 Titanium, 2 Silver, and 1 Rubber. It auto-equips and raises oxygen to 75.
Pickups worth taking
Silver
Collect at least two pieces for Standard Air Tank. Extra Silver is useful, but only if oxygen and inventory stay comfortable.
Copper
Gather nearby Copper after the two Silver pieces if the return route is still safe.
Portable Storage
Pick it up near the first cave and use it to reduce inventory pressure on the route.
Copper Wire
Grab the table pickup while you are already inside the cave cluster.
Basic First Aid Kit
Pick it up while descending through the green-lit Silver cave.
Scans inside the route
Wakemaker progress
Near the first cave cluster before the black-cable route.
Beacon progress
Near the same cave cluster, useful before longer navigation loops.
Repair Tool 1 / 3
On the desk inside Colonist Bunker 1. This is progress, not the complete unlock.
S Shelf
Scan the wall fixture inside Colonist Bunker 1.
Trashcan
Scan it before leaving the bunker interior.
Scan highlights
Repair Tool progress
Scan the desk object for Repair Tool 1 / 3 progress.
S Shelf unlock
Scan the wall fixture to unlock S Shelf.
Trashcan scan
Scan the Trashcan before leaving the bunker.
75 oxygen result
After crafting the Standard Air Tank, oxygen rises to 75.
Finish with Standard Air Tank
After returning home, craft the Standard Air Tank at the Fabricator. The tank auto-equips after crafting, and oxygen rises to 75. That extra margin makes the next scan and material trips much more forgiving.
- Recipe: 2 Titanium, 2 Silver, 1 Rubber.
- Result: Standard Air Tank equipped automatically.
- Oxygen value after this route: 75.
Questions people ask
When should I run the Colonist Bunker 1 Silver route?
Run it after Basic Fins, Scanner, Portable Storage, and a Basic Battery are stable. The route is much safer when it is a focused trip instead of your first open-water wander.
How much Silver do I need before returning home?
Bring back at least two Silver for Standard Air Tank. The recipe also needs 2 Titanium and 1 Rubber at the Fabricator.
Does Colonist Bunker 1 fully unlock Repair Tool?
No. The desk scan gives Repair Tool progress, shown here as 1 / 3. Scan it anyway because you are already inside the bunker.
Why is the BioBed important?
The BioBed panel expands the quick-slot bar from five slots to six. That matters immediately once Scanner, Air Bladder, tools, food, and utility items compete for hotbar space.