"It is really buried," Markus observed. He didn’t have to explain that "it" was the command module—the part of Ymir that had life support systems. It ought to be reachable through a docking port. But they weren’t seeing anything. They had known—because it was part of the plan—that Sean and his crew would have buried it in the ice, to protect them from radiation and from rocks. They looked to have buried it deep.