NOVELTY - The system has a float-turbine with a central passage serving as a water-turbine (14) slidably mounted on a post (13) while a float remains placed partially above a surface of water. Top of the float-turbine drives a set of wind power generators (17) to produce electricity through a gearbox or gearing system. The float-turbine has a set of hinged blades (15) extending below the surface of the water and circumferentially spaced on an outside circumference of the float-turbine, and has hinged foldable blades that minimize water resistance to the blade while rotating in an upstream direction.    USE - System for converting hydrokinetic energy (HKE) in waves, water currents and in tidal flows to electricity in a HKE conversion (HKEC) industry. Can also be used for electric energy generation in structures in water e.g. offshore oil/gas drilling platform, seawall, transportation vessel on water and piers.    ADVANTAGE - The HKE turns the float-turbine, which turns an electric generator at a much higher RPM through the gearbox or gearing system such that power is produced that is used locally, stored in batteries for later use, or fed to a grid. The system prevents overloading of bridge columns beyond designed strength of the columns by mounting of the system on bridge-supporting columns already in use or designed in a future as part of upcoming bridge structures over water. The system adapts highly efficient wind power generators for energy production by appropriate mounting on bridge columns, marine structures such as offshore drilling platforms, seawalls, and vessels for transport by water including boats, tugboats, ships, fishing boats and lifeboats.    DETAILED DESCRIPTION - The hinged blades are water-turbine blades.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a system where a bridge column supports a post that takes a equal to a vertically-sliding float serving as a rotary turbine with blades dipping in water.    Water flow deflector (11)    Post (13)    Water-turbine (14)    Hinged blades (15)    Wind power generators (17)