This article is about Mobile Vehicle Bay in Subnautica. For the related article on the Below Zero Wiki, see Mobile Vehicle Bay.

Congratulations, survivor: you have just exceeded your weekly exercise quotient by 500%. Data indicates that swimming was your favorite activity. Be sure to vary your routine for uniform muscle development.


― PDA, Dialogue


The Mobile Vehicle Bay is a deployable item that allows the player to construct vehicles. It can be crafted by using the Fabricator. It takes up nine inventory slots while in the player's inventory.

The player must scan three Fragments to obtain the Blueprints for the Mobile Vehicle Bay. These can commonly be found in Wrecks.


When released by the player, it will float to the surface and unfold itself. It can then be boarded with LMB (Xbox One:XBOX A, PlayStation 4:Combops4x). Using the interface, the player can construct a Seamoth, Cyclops, or Prawn Suit if they have the required materials and blueprints.

The base of the Mobile Vehicle Bay houses four fabrication drones that will activate themselves and float above the Mobile Vehicle Bay when the player approaches. When the player selects a vehicle to construct, the fabrication drones will swarm out in front of the Mobile Vehicle Bay to build the vehicle in the time it requires, showing its progress in the same fashion as using the Habitat Builder.

The player can pick up the Mobile Vehicle Bay by looking at the metal platform and pressing LMB (Xbox One:XBOX A, PlayStation 4:Combops4x).

It is currently possible to deploy and trap the Mobile Vehicle Bay under a Moonpool, allowing vehicles to be constructed at any depth.

Spoiler alert: The following section contains story related material.

The Mobile Vehicle Bay can also be used to construct the Neptune Launch Platform if the player has the required blueprint.


Titanium IngotLubricantPower CellArrow-right (1)FabricatorArrow-right (1)Mobile Vehicle Bay

Uses in Crafting

Titanium IngotPower CellGlassGlassLubricantLeadArrow-right (1)Mobile Vehicle BayArrow-right (1)Seamoth

Plasteel IngotPlasteel IngotPlasteel IngotEnameled GlassEnameled GlassEnameled GlassLubricantAdvanced Wiring KitLeadLeadLeadArrow-right (1)Mobile Vehicle BayArrow-right (1)Cyclops

Plasteel IngotPlasteel IngotAerogelAerogelEnameled GlassDiamondDiamondLeadLeadArrow-right (1)Mobile Vehicle BayArrow-right (1)Prawn Suit

Spoiler alert: The following section contains story related material.

Lead×4Titanium IngotTitanium IngotComputer ChipArrow-right (1)Mobile Vehicle BayArrow-right (1)Rocket Base

Data Bank Entry


The mobile vehicle bay is a deployable station equipped with fabrication drones, designed to construct small research and exploration vehicles from raw materials. It is a common tool in almost all industrial, scientific and colonization operations.



  • The Mobile Vehicle Bay was originally called the Constructor.
  • If dropped by the player, it will float to the surface and unfold.


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