An antigravity plate, or grav plate, is a small form of anti-gravity technology developed by the United Nations Space Command. As of 2531, they were considered old technology and they never were widespread. Grav plates were designed to be attached to other objects, thereby enabling them to float off the ground. Notably, an antigravity plate was used in one instance by insurrectionists to incapacitate a group of Spartan-IIs by simulating the force of 10 g's of gravity, which caused their Mjolnir armor's compensatory mechanisms to drastically increase the internal pressure of the suits.
List of appearances
- Halo: Ghosts of Onyx (First appearance)
- Halo: Fractures
- Tales from Slipspace
- Halo: Retribution (Mentioned only)