How to Save Game Anywhere on the Map
You can only fast travel to the Unreliable (ship) on the Supernova difficulty, and auto-saves are extremely limited. You can only save (or auto-save) in your ship. There is a way around this system. When you fast travel to your ship, an auto-save will be generated at the spot where you just traveled from. Load your new auto-save file after traveling. Since you cannot fast travel anywhere else, this is a great way to generate saves anywhere on the map.