Abstract: The present invention provides a virtual slalom course and display which allows a water skier to develop the skill and timing to maneuver through a slalom course without the need for an official course. The apparatus is operable to display to the skier where the virtual slalom buoys are (or where they would be), where the skier is in relation to the buoy, and/or where the skier should be at any moment in time if the skier is to optimally traverse the virtual slalom course. The apparatus includes inputs for the speed of the boat, the dimensions of the desired virtual slalom course (preferably the dimensions of an official slalom course) and the length of the rope in order to calculate the skier's ideal position. Feedback through a rope angle sensor preferably facilitates the display of the skier's actual position.