A grav-tank was an armored vehicle propelled by an anti-gravity engine.

In 2328, on day zero of the Occupation of Bajor, Gar Osen observed three Cardassian grav-tanks approaching the Naghai Keep in the city of Korto. They resembled legless beetles with pintle-mounted disruptors. (TLE - Terok Nor novel: Day of the Vipers)

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