I wanted to know, i looked for a while and did not find any info on this, i was using the ship lander and i saved a couple biomes like kerbin mountains to launch from higher up for testing and when i loaded my save up the next day all my saved coords were gone. i checked and i found the coords save file, if i restart my game it deletes it, so i copied the file and put it in the same folder under a different name. It deleted that too. What reason is there to have a save coords button if they get deleted on a per session basis.