This guide will provide you with every location you can find Repulsion Cannon Blueprints in Subnautica.
There are four places where you can find the blueprint for the repulsion cannon. No matter what, there is one place where the blueprint will always spawn.
You need to start from the coral tube that sticks up out of the water, as you will use it for your main starting point, and head north or one notch to the left of the north until you reach a wreck in the underwater island biome.
It is recommended to bring a sea moth with an MK1 or MK2 depth module, perimeter defense, a sea glide, and a flashlight, and you will have to have a laser cutter if you want to access the wreck fully.
The main creatures you will run into here are bone sharks, which are very annoying because there are many of them in this biome. They can easily destroy your sea moth if you aren’t careful; you can use perimeter defense against them to ward them off but make sure you leave your sea moth in a safe place, maybe near the surface, as they will attack it even after you get out.
The coordinates are (-102, -179, 860).
The next spot you can reach by using the same starting point and heading just in between south and southwest or two notches to the right of the south until you reach a wreck in the grand reef.
Bringing a sea moth with an MK1 or MK2 depth module, perimeter defense, a sea glide, and a flashlight is recommended. You will need a laser cutter to fully access the wreck and a knife.
The main creature you will run into here are warpers, which can warp you out of your sea moth/prawn suit; they cannot warp you out of a cyclops. If you are fast enough, you can use perimeter defense against them or if they warp you. You can attack one using a knife until it takes enough damage so that it warps away.
The coordinates for this location are (-290, -222, -773).
The next place you need to head to (using the same starting point) is about two notches to the right of the northeast until you reach lifepod 12 in the bulb zone. You may already have the beacon for it if you’ve already spent 14 hours in the game.
Bringing a sea moth with an MK1 or MK2 depth module and perimeter defence is recommended, and a sea glide is all you should need.
The main threats you will run into here are ampeels and bone sharks. Bone sharks are practically the same as they were in the underwater islands but are less dangerous only because there aren’t nearly as many of them in the bulb zone as in the underwater islands.
Ampeels are the other big threat you’ll run into when passing through the biome; they are easy to spot since they are fairly large and always crackling with blue electricity. They can deal big damage to you and your vehicle. On top of that, they are immune to perimeter defense, so your best bet is to either run from them or use the stasis rifle against them.
The coordinates for this location are 112, -266, 566.
The last place you can find the repulsion cannon blueprint, and it spawns at this location in pretty much every save. You need to start from the coral tube one last time and head towards the front of the aurora as you will be going inside the aurora for this spot.
Bringing a sea moth or a sea glide is recommended to reach the biome faster, and you will need a laser cutter, a repair tool, and a few door codes. You also need a propulsion cannon to make getting past the first few crates less difficult.
There aren’t any threat threats in the aurora, the only things that can hurt you are bleeders and cave crawlers, but they do so little damage and can be killed so easily that they don’t even need to be considered an actual threat to you.
When you reach this spot, if it’s your first time on the aurora, then there may be some boxes here blocking the way; you can use the propulsion cannon to move the boxes out of the way; now, if you don’t have a propulsion cannon then it is possible to sprint jump onto one of the boxes and get over that way, but is just easier to use the cannon.
The code for this door is 1454.
When you see the drive room ahead and the sea moth bay to the right, you will head left to the prawn suit bay.
When you reach the prawn suit bay, and you’re in this area, you are going to go into the water and go straight to the wall, then go left (while you’re underwater), and when you go left, there should be a tunnel leading to a new area.
The code for this door is 6483.
And the blueprint will be in a terminal that you can find in the room and interact with.
