The player must cure themselves of the Kharaa Bacterium before being able to disable the Quarantine Enforcement Platform and leave the planet. Another purple tablet can be found above the entrance of the Quarantine Enforcement Platform. The player must locate a Purple Tablet to gain entrance to the Quarantine Enforcement Platform without using the moonpool several of them are located on the island, one of them located inside the facility itself on the balcony near the barrier to the control room, and one is located in an underwater cave near the base. The main section of the structure stretches from 20 meters above the surface to 130 meters below it, with the cannon adding an additional 110 meters to its height even in its resting state.

There is only one Quarantine Enforcement Platform on the entirety of Planet 4546B as its beam can bend around the planet to strike ships on the other side. Near one of the entrances, an Alien Arch connecting to the Primary Containment Facility can be found. The Quarantine Enforcement Platform was built by the Precursor Race around one thousand years ago, in order to contain the Kharaa Bacterium.

It is the source of the energy beam responsible for causing both the Degasi and Aurora to crash on Planet 4546B, as well as destroying the Sunbeam during its rescue attempt. The Quarantine Enforcement Platform is a massive Alien weapon system that is located on the Mountain Island.

Subnautica moonpool station