Submerged Log 11: Copper, Caves, and Structural Regret
Platform: Steam Deck
Video: Base upgrades, lifepod dive to 250m, cave panic, and Seamoth improvements (no commentary)
The plan had been simple: head back to the Aurora, find the black box data, and pretend I wasn’t about to get shot out of the sky by an alien cannon.
Reality check: I’m not leaving this planet anytime soon.
If I’m here for the long haul, the base needs to stop feeling like a damp hallway with ambition.
Bulkheads, Flooding, and The Game Laughing Directly at Me
I started by looking at a bulkhead, because in my head that means “less flooding” and “more responsible adult survival.”
In practice, the game basically laughed and told me to enjoy living in a fish tank.
So I pivoted to the upgrades that actually move the needle:
more power and medical supplies.
Solar Power and the Medkit Fabricator: A Short Story About Suffering
Goal one: another solar panel.
Goal two: a medkit fabricator, because I’m tired of treating “hope” as a healing item.
Then I checked what I needed and immediately had a new enemy: creepvine samples.
Not because they were hard to get.
Because I already had them.
And then I ate them.
So off I went to replace the snacks I shouldn’t have treated as snacks.
Radio Interruptions: Lifepod 4 Joins the To-Do List
Mid-upgrade, I got a distress signal from Lifepod 4, with the helpful advice to wear a radiation suit.
Which is fair.
But I’ve already handled that situation.
So Lifepod 4 gets added to the list of places I will absolutely go to…
once I’m done putting out the current fires I set myself.
Copper: The Myth, The Legend, The Personal Insult
Copper remains elusive.
I’m finding diamonds more often than copper, which feels like the planet is doing comedy at my expense.
All of this because I need copper wire for a computer chip.
Which means the moment I want to build something “basic,” the universe decides I need to earn it.
At this point I’m seriously considering a scanner room, purely so I can stop living my life like a metal detector with legs.
Medkit Fabricator Online (Finally)
Once the medkit fabricator was up and running, I moved on to a quality-of-life upgrade I should have made ages ago:
a beacon.
I named it “base”, because:
1) it is a base
2) I would like to find it again
3) I don’t need to overthink this
Valentino Goes Deep: The 250m Lifepod Run
With “base” now marked like a sensible person would do, I took Valentino for a drive to a lifepod sitting around 250m down.
Naturally: no survivors.
The ocean doesn’t do happy endings.
But I did come away with something useful: a blueprint for a Repulsion Cannon.
I still need a Modification Station before I can get too excited, but I’ll take a win when it shows up.
The Beautiful Cave That Immediately Became A Problem
Next up: a cave near another lifepod location.
The cave itself is gorgeous.
It’s also the kind of place where you realise, mid-swim, that you have no idea where the exit is.
And that’s when I moved “make a beacon” from “good idea” to “non-negotiable survival requirement.”
I eventually found my way back out, and I didn’t drown in a glowing underwater postcard, so that counts as success.
Valentino’s New Problem: He Can’t Go Anywhere Without Taking Damage
Back at base, I had a new priority: hull reinforcement for Valentino.
He couldn’t so much as breathe underwater without scraping something and taking damage.
So I did what any reasonable person would do:
I went hunting for diamonds.
For armour.
On a submarine scooter.
Completely normal.
Eventually I got lucky and upgraded Valentino with:
- Hull Reinforcement
- Storage Module
Now he’s tougher, roomier, and slightly less likely to come home looking like he lost a fight with a rock.
Next Time (If Copper Stops Playing Hard To Get)
- Hit Lifepod 4 (radiation warning acknowledged, thanks)
- Seriously consider a Scanner Room to end the copper scavenger hunt
- Start working toward the Modification Station so that Repulsion Cannon isn’t just a tease
- Revisit the Aurora plan… after accepting I’m probably getting shot down anyway
More from Subnautica
-
Submerged: A Subnautica Survival Diary Hub
— all logs, guides, and survival progress. -
Subnautica Crafting Reference Guide
— the “what do I need to build this?” page I wish I had earlier.

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