(NL1006496-C2)      The installation comprises windmills (1) which are mounted on a frame (5-7) which has floats (15). The installation is capable of turning about a vertical axis in order to turn the windmills towards the wind. The windmills are supported in bearings in gondolas (2) and are mounted in two horizontal rows one above the other.    The gondolas are secured to girders with two platforms (25) on the floats supporting the girders together with a central anchored float (16) which has a bearing (17). A motor driven propeller (20) rotates the floating island about the vertical axis of the bearing. A slevane arm (9) and a crane jib (10) are mounted on a crane (80) for carrying out maintenance.    USE -   Floating island of windmills.    ADVANTAGE -   Simple and stable structure which allows the windmills to be directed at the wind.    (EP995035-A1)      The installation comprises windmills (1) which are mounted on a frame (5-7) which has floats (15). The installation is capable of turning about a vertical axis in order to turn the windmills towards the wind. The windmills are supported in bearings in gondolas (2) and are mounted in two horizontal rows one above the other.    The gondolas are secured to girders with two platforms (25) on the floats supporting the girders together with a central anchored float (16) which has a bearing (17). A motor driven propeller (20) rotates the floating island about the vertical axis of the bearing. A slevane arm (9) and a crane jib (10) are mounted on a crane (80) for carrying out maintenance.    USE -   Floating island of windmills.    ADVANTAGE -   Simple and stable structure which allows the windmills to be directed at the wind.    (JP2001509565-W)      The installation comprises windmills (1) which are mounted on a frame (5-7) which has floats (15). The installation is capable of turning about a vertical axis in order to turn the windmills towards the wind. The windmills are supported in bearings in gondolas (2) and are mounted in two horizontal rows one above the other.    The gondolas are secured to girders with two platforms (25) on the floats supporting the girders together with a central anchored float (16) which has a bearing (17). A motor driven propeller (20) rotates the floating island about the vertical axis of the bearing. A slevane arm (9) and a crane jib (10) are mounted on a crane (80) for carrying out maintenance.    USE -   Floating island of windmills.    ADVANTAGE -   Simple and stable structure which allows the windmills to be directed at the wind.