Abstract: An offshore floating rocket launch platform (12) is disclosed. The platform (12) floats on the surface of a body of water (14). A rocket (16) and a rocket launch support tower (18) are shown on the top surface (19) of the platform (12) in preparation for launch. The platform (12) includes a statically buoyant chamber 20) and more than one variable buoyancy-generating variable buoyancy-generating chambers (22). A number of variable buoying-generating variable buoyancy-generating chambers (22) are capable of being pressurized with a fluid to provide counter-acting forces that compensate for position changes of the platform incurred by natural forces. Other embodiment of the invention may be used for floating offshore structures like buildings (26), bridges (46) and wind turbines (50).