A Portable Antigrav was a piece of technology in use by the Federation, Klingon Empire and Romulan Star Empire.

These small, handheld devices attach to objects with magnetic clamps or sticky pads and allow the easy movement of heavy equipment from place to place by cancelling the object's weight. Once attached to the antigrav, objects have no effective weight and can hang unsupported in mid-air. One antigrav can cancel up to 100 kilograms of weight. Several may be used to move heavier items. Antigravs cannot produce a negative gravity effect, however. (FASA RPG module: Star Fleet Intelligence Manual: Agent's Orientation Sourcebook)

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