NOVELTY - The system (300) has a framework i.e. a container (70) where a shaft of turbine device extending from a wall side of the framework is enclosed by a housing of power transmission unit. An aerodynamic/streamlined uppermost portion (40A) of a ballast/floatation device (40) mounts an upper side of the framework and/or a lowermost portion (40B) a lower side of framework. A movable rudder device (50) which is provided on one of the sides of ballast device in a direction with/against the water flows is aerodynamic/ streamlined and arranged so as to provide for stabilization of the system.    USE - Turbine system for generating electrical energy from mechanical movement caused by water flow such as for e.g. tidal, ocean or river currents.    ADVANTAGE - A more compact and reliable turbine and system for recovering mechanical kinetic energy found in water flows having a velocity of about 0,5 meter per second (m/s) or more is obtained. The lateral stabilizers or wings that are provided on each sidewall of container are utilized for minimizing the friction associated with the system structure and/or for stabilizing system structure. The formations of vortices behind the turbine are eliminated. A locally generated and self sustained energy which are compact and/or mobile, as well as easy to construct, transport, handle and maintain/service or repair are provided to customers. The turbine assembly and system are mobile and movable by a truck, boat and/or helicopter where the weights and sizes are also based on the requirement of ease of transportation. Any adverse environmental impact is not involved in the system neither during installation, maintenance nor removal.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a turbine system.    Ballast or floatation device (40)    Uppermost portion of ballast or floatation device (40A)    Lowermost portion of ballast or floatation device (40B)    Movable rudder device (50)    Container (70)    Turbine system (300)