Quarantine Enforcement Platform

The Precursor Ground-To-Air Weapon System is a huge weapon that will be located by the Mountain Island. It created the energy pulses responsible for causing both the Degasi and Aurora to crash on Planet 4546B, as well as eventually destroying the Sunbeam.

The weapon was built by the Precursor race around one thousand years ago, in order to prevent the spread of Carar.

The door leading to the control panel of the system is protected by a scanner that prevents life forms infected with Carar from entering. The player must cure himself of Carar before being able to disable the gun and leave the planet.

To view the weapon firing, type 'playsunbeamfx' into the console.

Warpers can be found around the Precursor Ground-To-Air Weapon System.

Interior
There are two entrances to the Precursor Ground-To-Air Weapon System. One is located underwater at the bottom, resembling a hanger, and a smaller entrance on the island surface. The hangar is just large enough to fit the Cyclops. Inside the underwater entrance there is a large room, with a door blocked by a force-field. In the upper section of the weapon there is a strange reactor-like structure with a green core. A similar, larger structure can be found in the lower section, inside the control room.

Future Plans

 * A medium amount of Ion Crystals will be found here.
 * A Precursor Teleporter will be implemented in the lower section.
 * The default position of the weapon has it facing away from the Aurora, it will turn towards the Sunbeam before firing.
 * The water will be drained out of the Precursor Ground-To-Air Weapon System.
 * One of the rooms in the Precursor Ground-To-Air Weapon System may be shrunken down due to developer complaints on Trello.
 * More rooms may be added in the future.
 * Precursor Terminals will be present in various rooms.
 * The "sick scanner" will be moved from the moonpool area up to the control room.
 * An infection reveal animation will play when the player interacts with the control panel in the control room.

Trivia

 * The in-development name for the Precursor Ground-To-Air Weapon System was the Precursor G.U.N, or Precursor Global Defense System. This is a running joke, as "guns are not allowed in Subnautica".