Moonpool (Subnautica)

The Moonpool is a Seabase module which is constructed with the Habitat Builder. It functions as a dock and charging station for a Seamoth or Prawn Suit and is the only room where the Vehicle Upgrade Console can be placed. It must be placed below water to be useful.

The Moonpool can dock one vehicle at a time, and is used by approaching the underside of the structure. Upon entering the access area, robotic arms will reach down and grab the vehicle out of the water, securing it for charging while a short animation plays of Ryley getting out of the vehicle. From here the player can access the vehicle's upgrade slots and any cargo storage, repair the vehicle, or re-enter the vehicle upon which it is automatically released back into the water. They can also access a Prawn Suit's shoulder-mounted Power Cells, though they will have to jump into the water to access the Power Cell of a Seamoth.

To unlock the Moonpool Blueprint, the player must scan two of its Fragments. These can be found in Wrecks or the Mushroom Forest.

The Seabase that the Moonpool is attached to must have power (except in Creative Mode) in order to dock vehicles. It can, however, release vehicles without power. Docked vehicles will be charged from the base's Energy, restoring an equivalent amount of Energy to the vehicle's Power Cells. The rate of charging at a Moonpool is much faster than if one were to use a Power Cell Charger: this means that docking a Prawn Suit and swapping out its two Power Cells (which the player still has full access to) is superior to building a Power Cell Charger. To reliably charge a vehicle, one Moonpool requires at least 150 Energy, equal to two Solar Panels.

It is recommended to have an appropriate amount of space between the bottom entrance of the Moonpool and the sea floor. It should ideally be built far enough off the seafloor that a Seamoth will not hit the ground when it is deployed, but close enough that a Prawn Suit can easily reach the entrance with its thrusters. As one cannot rotate the Moonpool with the builder, the player will have to physically position themself so that the building 'faces' the direction they want it to. The 'rear' of the building is where the rotating antenna is located on the roof: the 'front' of the building dictates the direction a vehicle will face when undocking.

The Moonpool also allows the player to access their base from the water via two ladders on either end of the bottom entrance. This allows the player to freely exit and enter the Seabase outside their vehicle without needing to use a hatch. If a moonpool is located next to another moonpool, a double connection is possible.

With full acceleration, a Seaglide can jump into the moonpool without using the ladders.

If the roof is not being used for anything else (particularly Solar Panels in shallower water), there is enough flat space to place Exterior Growbeds on it.

Expansion

 * Hatches can be placed on all 6 side-panels.
 * Windows can be placed on all 6 side-panels.
 * Reinforcements can be placed on all 6 side-panels.
 * Wall Planters can be placed on all 6 side-panels.
 * I Compartments can be placed on all 6 side-panels.
 * The Moonpool can be expanded with other modules from its six side-panels.
 * The Vehicle Upgrade Console can only be constructed in the Moonpool on one of the side-panels.
 * The Moonpool cannot be expanded vertically in any way.

Gallery
Exterior=

Bugs

 * Entering a flooded base and exiting through a Moonpool with a Seaglide equipped will cause the player to swim at incredible speeds.
 * While a powered base is flooded there is an area at the top of the moonpool that contains oxygen. In addition, by parking a seamoth in the flooded base and swimming to a certain spot near the top-right it is possible to stand on the seamoth and get oxygen.


 * ​ Deconstructing a moonpool with a vehicle docked inside will cause the vehicle to teleport away.


 * When exiting a seabase through the ladders on the sides of a moonpool, the habitat will occasionally say "Welcome aboard captain".


 * Deconstructing a Moonpool while inside will cause the game to think the player is on land, even though the player is no longer in their seabase. This causes the player to have land physics (Fall damage, unlimited O2, falling , etc).

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