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An anti-gravity field (AG) is used to generate gravity[1] or hover in another gravity field.[2]

Personal AG units and harnesses allowed for limited flight within a sufficiently strong gravity field. A planet's gravity field was strong enough for flight. Orbitals did not have a strong gravity field at its surface and so could not support AG flight; they used spin to generate centripetal force and not mass to create a true gravity field.[2] Technologically generated gravity fields could support flight.[3]


  1. The Player of Games, chapter 3
  2. 2.0 2.1 Consider Phlebas, chapter 5
  3. Consider Phlebas, chapter 8