- "This is trading vessel Sunbeam. Aurora, we've received your emergency transmission and we're coming in for a closer look. Plan is to engage a slow burn and slingshot around the moon to conserve fuel. We'll alert you when we drop into low orbit around the planet. Stay safe. Sunbeam out." - Comm. Relay message.
Wouldn't it be cool if a sub-mission of Subnautica would be to destroy the Precursor Gun before the Sunbeam got to the planet? What if that is what the devs are planning?
OTHER IDEA: It is part of the main game in order to escape. Destroy the Precursor Gun before the Sunbeam arrives, if you don't, you either with permadeath, or you're just stuck on the planet forever.