Subnautica Wiki
This article is about Hull Reinforcement. If this is not what you are looking for, see Upgrade Module (Disambiguation).

The Hull Reinforcement is an upgrade module that can be crafted in the Vehicle Upgrade Console. It is available in Subnautica only, not in Below Zero.

This upgrade provides the Seamoth and the Prawn Suit with a system that preemptively hardens the vehicle chassis prior to collisions with terrain, eliminating damage under normal conditions.

The Prawn Suit does not take collision damage, rendering this upgrade useless for it.

Defense Value

The formula used for the collision damage is the following: , where s represents self damage, d represents possible outgoing damage, and n represents the number of equipped Hull Reinforcement modules.

  • 1 Hull Reinforcement -50% collision damage taken
  • 2 Hull Reinforcements -75% collision damage taken
  • 3 Hull Reinforcements -87.5% collision damage taken
  • 4 Hull Reinforcements: -93.75% collision damage taken

Damage is only reduced from collision with terrain. Other sources of damage such as aggressive fauna do full damage.


Titanium.pngTitanium.pngTitanium.pngLithium.pngDiamond.png×4Arrow-right (1).pngVehicle Upgrade Console.pngArrow-right (1).pngSeamoth Hull Reinforcement.png