permanent ballast

permanent ballast

A weight permanently installed on an aircraft to bring its center of gravity within specified limits. In some aircraft, fuel is used as a ballast. This fuel, however, cannot be consumed for use.
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2 boiler inspection, propulsion shaft removal and inspection, underwater hull preservation, ship s service turbo generator five-year American Bureau of Shipping inspection, structural plenums refurbishment, domestic reefer upgrade, five-year ABS tank inspection, and installation of permanent ballast and stability test.
So it was decided that some sort of permanent ballast would be necessary to make her seaworthy.