The Tadpole is your best friend for deep-sea exploration in Subnautica 2, and we can improve it with some extremely useful upgrades. The upgrades come in different shapes and sizes, but they all improve your submarine in one way or another.
You’ll have to find all the upgrade modules manually, and this guide will show you the way.
Table of contents
How to find all Tadpode upgrades in Subnautica 2
Before I dive deep, know that you can find these upgrade modules in any order you like. I’ve put them in order for maximum efficiency, though.
Scout Ray Chassis location
This is the only upgrade module that’s not located around the Alien Ruins Research Outpost. Instead, you’ll need to head to the Tadpole Pens in the warm area of the ocean. Head inside, and continue straight on the path. You’ll find the Scout Ray in the Moonpool; scan it, and we’re done here.
I highly recommend upgrading to the Scout Ray if you have the resources. This chassis offers a huge speed bump to your Tadpole, and it will help save a lot of time during the next steps.
Engine Efficiency upgrade location
Head east from your Lifepod and you’ll find the Alien Ruins Research Outpost at approximately 1300m. Head inside, and turn right. You’ll find the Engine Efficiency upgrade module.
Strike Armor upgrade location
From the Research Outpost, travel between 195 and 210 degrees on your compass. You should aim for a depth of approximately 190m (go gradually instead of taking a sharp dive).
You’ll find the platform with the Strike Armor upgrade at around 60m from the outpost.
Cavitation Muffler upgrade location
This is the furthest upgrade module to find. Return to the front of the outpost. Head to deeper depths while aiming at around 75 degrees east on the compass. You’ll come across the above structure in the image (this is the Power Center). Go past the arc shown in the picture, and then past the pillar.
The screen will become greener, and you’ll find a set of colorful alien plants to your right. Keep to your left, and keep going deeper, targeting around 350m. At around 370m, you’ll find a platform on the edge of the cliff on the left (it’s extremely close to the early access area boundary).
Here, you’ll find the Cavitation Muffler upgrade. You should return to the Outpost after obtaining this module.
Photovoltaic Charger upgrade location
Head towards 120 degrees on the compass from the outpost. You’ll find the Blackbox – Iso marker to use as your guide. Keep a steady depth of 120m and head straight. You’ll come across an Alterra starship wreck. Park your Tadpole and head inside using the door on the left.
Head straight, turn right, and you’ll find a broken door. Repair the door, and head inside. Then turn left and go to the next room. Take the door to the left corner, and you’ll come across the room with the ISO. The module is diagonally opposite to the dining table that has the ISO on it.
Depth Module Mk. I upgrade location
Return to the front of the Research Outpost. Aim at 165 degrees on the compass, and you’ll find the Blackbox – Ruby 2 pop up on your screen. Head to the spot and reach the bottom layer. You can enter through the broken rocks; I entered through a narrow spot on the left (leave your Tadpole), and you’ll find Ruby 2’s black box.
You’ll also find a broken-down Tadpole, with the Depth Module Mk. 1 beside it.
Haul Chassis upgrade locations
To get the Haul Chassis, you’ll need to scan three fragments. The first one is located just by the Depth Module Mk. 1 upgrade. Once done, return to the Research Outpost and head straight targeting between East and 105 degrees on the compass.
Go past the dome of the Power Center (stick strictly to 105 degrees now), and head straight. Keep heading straight, and you’ll reach another Alterra shipwreck at about 200m.
The second Haul Chassis part is on a platform to the left.
To find the final one, refer to this guide, which states the location of the final Angel Comb. You’ll want to go past the Angel Comb and head straight, following the root until you reach an acidic pool.
Look to your left past the alien structures after entering the pool room, and you’ll find your final chassis part.
Complete the scan, and your Tadpole will now be able to equip the Haul Chassis.
