gravity conveyor

"What gravity conveyor?"

"Well, I was right behind you on the gravity conveyor, or whatever you'd call it, from that crazy place that we all walked out into from the plane, and then..." She broke off as she caught the perplexed expression creeping across Hunt's face.

I heard a hoarse excitement of shouts, went quickly to the rail, and stared down and saw Ans Terry coming down the gravity conveyor, sitting up, riding backward, clubbing with his fist at the burly deck hand who had hold of one ankle.