How do shuttles work? Mine just sits there (within 15 tiles of home base) "Waiting for crew" and won't go on a mission. It has full fuel. I'm trying to move it to be a mobile construction office to build the radio tower far away.
edit: okay, it finally left on the mission. it landed next to the intended radio tower location. the entrance to the shuttle and the entrance to the tower were not blocked. the game complained that there is no route. i have no idea what i'm supposed to do.