You need a real time space-time equivalent of a map to tell you how much of anti gravitons to emit in what direction to keep still. It could also be: 1. Devic

You need a real time space-time equivalent of a map to tell you how much of anti gravitons to emit in what direction to keep still. It could also be: 1. Device starts. 2. Map data not yet available. 3. Oops. Erratic movements. 4. Map data now available, device stable. Kinda sequence of steps.