ScoutDrone1 had already reached it and started a search pattern, and I sent ScoutDrone2 in after it. A shaft of dim daylight and a sand drift on the floor had led it immediately up to a big seam in the ceiling that should be part of the hatch system that allowed the ships in and out. A small section had been cut open at some point, large enough to allow in the aircraft that was parked on the landing platform. The shuttle, following our progress from the air, had already gotten there and found the opening. ART-drone was building a map using ScoutDrone1’s movements.