| 摘要 |
Water skiers towed behind a boat can be towed by varying lengths of rope automatically adjusted by letting out or reeling in the rope to provide different lengths. The rope, trailable aft of the boat having a first boat-connecting end and a second terminal handle end has at least one length indicator placed on the rope between the first boat connecting end and the second terminal handle end. The rope is connected to a winching means mounted on said boat attached to the first boat-connecting end. A switching means allows an occupant of the boat to actuate the winching means as the boat moves through the water. A sensing means senses the passage of the length indicator on the rope, and provides a signal to the winching means upon sensing the length indicator. This signal stops the winching means, disposing the sensing means within ten centimeters of the length indicator, thereby providing at least two precisely predetermined lengths of rope trailable aft of the boat.
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