The Precursor GUN, formarly known as the Quarantine Enforcement Platform, was designed by Precursors on planet 4546B thousands of years ago. Planet 4546B (Subnautica) is infected with a disease called the Carar. In Subnautica, you need to find a cure for the carar to get off the planet, and get back home. One ship, the Sunbeam comes to rescue you, but... If you want to see more things from Subnautica, upvote or comment! And also don't forget to check out my profile page to a link to a simpleplanes website made on google sites. Hope you enjoy!