NOVELTY - The method involves creating an apparatus module comprising a floating housing (2) equipped with the hard and soft compartments enduring higher and lower pressure. The module is transported to its production site. The module is descended onto a bottom of a water basin. The water is allowed to run into hard compartments starting at first end of module after essentially filling all soft compartments with water so that a housing descends onto the bottom of basin ahead the first end of module and draws the recovery units into the site at the same time.    USE - Method for installing and servicing apparatus recovering kinetic energy such as wave energy or tidal energy of water of sea in wave energy power plant.    ADVANTAGE - Since the water is allowed to run into hard compartments starting at first end of apparatus module after essentially filling all soft compartments with water, the housing descends onto the bottom of basin ahead the first end of module and draws the recovery units into the site at the same time so that the installation and servicing or repairing is faster and easier. Thus, the apparatus for recovering wave energy of seawater can be installed and serviced more easily, faster and with reduced costs. Since the hard compartment stands the water pressure, the hard component does not collapse in the water though it still has air inside it so that the second end of the housing does not crash into the sea bottom but descends slowly and controlled onto the sea bottom. Thus, the rest of the hard compartments at the second end of the housing are allowed to be filled with water to achieve a sufficient gravitation to keep the apparatus module at the sea bottom.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an apparatus for recovering kinetic energy of water.    DESCRIPTION OF DRAWING(S) - The drawing shows a side view of the apparatus module after lifting and ready for towing.    Floating housing (2)    Wing element (3a)    Anchor chains (10)    Sea bottom (12)    Compressor (13)