Seabases (Below Zero)

This article is about Seabases in Below Zero. Click here for information on this subject in Subnautica.

Seabases are installations created by the player through the use of the Habitat Builder.

A Seabase provides an area where the Player can return for oxygen, and serves as an alternative to the Drop Pod as a base of operations. Within a seabase, the player can construct additional storage space, grow food, access appliances not available in the Drop Pod, and add aesthetic options. Thus Seabases provide safe havens away from the Shallow Twisty Bridges the player starts in.

In all Game Modes except Creative Mode, entering a Seabase secures the player's inventory, so if the player dies, they will return to the last Seabase' they visited and keep all the items in their inventory that they had when they were there (unless they later enter the Drop Pod).

The player will start out with most of the blueprints they need for a basic Seabase; at bare minimum one needs an I Compartment, a Hatch, and a power generator (the Solar Panel is unlocked by default). The initial compartment must be built on or near the ground (or on a Foundation, which is not necessary but provides greater hull integrity and a flat surface to work with), but any additional compartments can overhang without any issue, allowing bases to be built over cliff sides. The player can expand once they've gathered more Blueprints. Despite their name, Seabases can be built on land. When on land, Hull Integrity is not a factor, and can be built without the need of additional Reinforcements, Foundations, or Bulkheads. Power is still needed for them to operate, however.

Hull Integrity

Hull Integrity refers to the ability of the player's Seabase to withstand the pressure of the surrounding water. The majority of the modules will lower the integrity once added but the amount will vary by module. As Seabases are built at a greater depth the integrity reduction caused by each module will increase. Hull integrity can be increased by constructing Reinforcement panels, placing a Seabase on or near a Foundation (foundations built on top of rooms will still provide their benefit), or installing Bulkheads on the ends of Compartment modules.

When the hull integrity of a Seabase is less than or equal to zero, it will begin to form hull breaches. Any corridor or room that is connected to the breach will begin flooding with water. Bulkheads can compartmentalize the base and prevent floodwaters from moving between compartments, but if the integrity remains below zero then eventually every compartment will develop a leak and the base will fill completely with water. To avoid this, quickly increase the base's integrity (by either adding strengthening components or removing weak components) and fix all hull breaches in the base using a Repair Tool.

A Seabase that receives damage to its exterior (or even a knife hit from inside) will also spring leaks, but the hull integrity will be unaffected. Therefore, bulkheads are more effective at sealing off flooding if the base comes under attack.

Energy Usage

Energy can be provided to a Seabase by building various types of generators near or inside the Seabase. Any number or combination can be used. Appliances such as the Fabricator will drain energy from the Seabase.

There are currently four generators available to power Seabases:

• Solar Panels, which work best near the surface
• Bioreactors, which consume any organic matter for power
• Thermal Plants, which collect heat energy (use near Lava Geysers and Black Smokers)
• Nuclear Reactors, which consume Reactor Rods made from Uraninite Crystals

Bioreactors and Nuclear Reactors are built inside a Multipurpose Room or Large Room. Solar Panels and Thermal Plants are built outside, and can be directly attached to the base or connected via Power Transmitters if the distance is too great.

Seabases do not require energy to operate in Creative Mode.

The following appliances and rooms draw power from the Seabase:

• Fabricator
• Battery Charger
• Power Cell Charger
• Modification Station
• Water Filtration Machine
• Spotlight
• Floodlight
• Scanner Room (passively, along with fabricator and with recharging the Camera Drones)
• Control Room

Oxygen

Seabases automatically produce Oxygen as long as there is power supplied. If the power is depleted, the Seabase will slowly lose oxygen, until it is completely gone.

How to Build a Seabase

1. Find a suitable piece of land.
2. Equip the Habitat Builder and press RMB to bring up a crafting menu.
3. In the Habitat Compartments tab, select the desired module.
4. Aim at the desired building place (the outline of the module will become green if the location is valid).
5. Adjust the rotation with Mousewheel Up and Mousewheel Down or [ and ].
6. Place the module with LMB.
7. Once placed, hold LMB to add the required materials to finish the building process.
8. Go to Step 2 and repeat for each room you want to build.

To deconstruct a Seabase module, equip the Habitat Builder and hold Q while facing the module. If enough inventory space is available, the module will be deconstructed and all materials used to create the module will be returned to the player's inventory, one item at a time. Note that everything inside the module and attached to the outside of the module must be deconstructed before the module itself can be deconstructed.

Base Parts

Base Pieces

Item	Description	Item ID
Foundation	Reinforced habitat foundation.	basefoundation
I Compartment	Basic tubular compartment.	basecorridori
L Compartment	L-shaped compartment.	basecorridorl
T Compartment	T-shaped compartment.	basecorridort
X Compartment	X-shaped compartment.	basecorridorx
I Glass Compartment	Basic glass-walled compartment.	basecorridorglassi
L Glass Compartment	L-shaped glass compartment.	basecorridorglassl
Vertical Connector	Vertical base connector.	baseconnector
Multipurpose Room	A basic room in which to install a range of different components.	baseroom
Scanner Room	Locates resources and wrecks within range.	basemaproom
Moonpool	Vehicle docking bay.	basemoonpool
Observatory	Compartment with 360 degree views and low structural integrity.	baseobservatory
Control Room	A control room.	basecontrolroom
Large Room	A large room.	baselargeroom
Multipurpose Room Glass Dome	A glass dome.	baseglassdome
Large Room Glass Dome	A large glass dome.	baselargeglassdome
Hatch	Provides an access point to the habitat.	basehatch
Window	A port hole for your habitat, installed on an existing wall.	basewindow
Reinforcement	Increases hull integrity.	basereinforcement
Seatruck Dock	Docking bay for Seatruck plus any attached modules. High power and structure requirements.	basemoonpoolexpansion

Exterior Modules

Item	Description	Item ID
Solar Panel	Powers habitat oxygen generation and other habitat modules. Converts available sunlight into low power electrical energy.	solarpanel
Thermal Plant	Converts heat to energy (> 15 °C) (50 power/min).	thermalplant
Power Transmitter	Extends range of power source.	powertransmitter
Snowfox Hoverpad	Deployable pad which recharges and repairs the Snowfox hoverbike.	hoverpad
Floodlight	Industrial, battery-powered lighting, designed for all environments.	techlight
Spotlight	Fixed lighting solution.	spotlight
Exterior Growbed	Artificial plant bed, suitable for use on land or underwater.	farmingtray
Base-attached Air Pump	Base-attached device that pumps air into pipes. Acts as a starting point for a pipe chain.	basepipeconnector
Snowman	A man made of snow.	snowman

Interior Pieces

Item	Description	Item ID
Ladder	Connects two floors.	baseladder
Water Filtration Machine	Separates water and salt.	basefiltrationmachine
Bulkhead	Structural support and can stop water flow (+2HP).	basebulkhead
Bioreactor	Composts organic matter into electrical energy.	basebioreactor
Nuclear Reactor	Processes nuclear reactor rods.	basenuclearreactor
Alien Containment	Provides optimal conditions for flora and fauna. Add a hatch to enter.	basewaterpark
Large Room Partition	A room partition.	basepartition
Large Room Partition Door	A room partition door.	basepartitiondoor

Interior Modules

Item	Description	Item ID
Fabricator	Basic survival fabricator. Atomically rearranges raw resources into useful objects.	fabricator
Radio	Receive short-range communications.	radio
Wall Locker	Wall-mounted storage locker.	smalllocker
Locker	Locks away things you need to store.	locker
Battery Charger	Can charge up to 4 batteries simultaneously.	batterycharger
Power Cell Charger	Can charge up to 2 power cells simultaneously.	powercellcharger
Aquarium	Self-sustaining aquatic habitat.	aquarium
Modification Station	Advanced fabricator for modification of survival equipment.	workbench
Jukebox	Listen to soothing tunes by Alterra's best musical artists while you work.	jukebox
Jukebox Speaker	A device that generates sound waves.	speaker
Basic Plant Pot	Titanium pot containing synthetic soil.	planterpot
Composite Plant Pot	Designed titanium pot containing synthetic soil.	planterpot2
Chic Plant Pot	Upmarket titanium pot containing synthetic soil.	planterpot3
Indoor Growbed	Artificial plant bed, suitable for interior use only.	planterbox
Plant Shelf	Wall-mounted plant pot.	plantershelf
Recyclotron	Recycles items into their constituent parts.	recyclotron
Coffee Vending Machine	Synthesizes hydrating, caffeine-free coffee.	coffeevendingmachine

Miscellaneous Items

Item	Description	Item ID
Bench	Simple metal relaxation appliance. Conserves energy when resting.	bench
Basic Double Bed	A double bed.	bed1
Quilted Double Bed	A double bed with a beautiful gray linen spread.	bed2
Single Bed	A single bed.	narrowbed
Desk	Common starship work desk.	starshipdesk
Executive Desk	Executive work desk.	executivedesk
Swivel Chair	Turns 360 degrees.	starshipchair
Office Chair	Relaxing and confidence building.	starshipchair2
Command Chair	Commandeering.	starshipchair3
Sign	Sign post with configurable text.	sign
Picture Frame	Wall-mounted frame, upload desired image from compatible PDA photo galleries.	pictureframe
Bar Table	Round glass table.	bartable
Trash Can	Trash cans.	trashcans
Nuclear Waste Disposal	Used to dispose of nuclear waste.	labtrashcan
Vending Machine	Vending machine.	vendingmachine
Counter	Counter.	labcounter
Fridge	Keeps food cold and prevents it from spoiling.	fridge
Shower	Emits high-intensity water streams. Soap not included.	shower
Sink	A place to do the dishes.	sink
Small Stove	Low-power conduction unit. Useless.	smallstove
Toilet	Alternatively, you could just go to the ocean.	toilet
Wall Planter	Wall-mounted foliage. Purely decorational.	baseplanter
Single Wall Shelf	Single wall shelf.	singlewallshelf
Wall Shelves	Wall shelves.	wallshelves
Aromatherapy Lamp	A lamp to calm your nerves.	aromatherapylamp
Executive Toy	A concentration aid.	emmanuelpendulum