These SecUnits must have come from the second Barish-Estranza shuttle, the armed one. It might be still on the ground where Ratthi and ART-drone had seen it last, it might be hunting for our shuttle, but at some point it had dropped its SecUnits outside the installation, to watch for escape attempts by colonists. I knew their SecUnits had the same 100-meter limit ... No, I didn’t know that. They had the same kind of kill switch if they were too far from their human supervisors, but I had no idea what the limit was, or if this proprietary brand allowed a human supervisor to waive the limit for emergencies.