rules to play water skiing

You must have an observer when skiing. The law says that the boat driver must be at least 15 years old, or be sitting beside and under the direct supervision of a person 15 years old, and the observer must be at least 7 years old. Now, you could argue that a 7 year old is not necessarily mature enough to maintain a constant watch on the skier, and a driver in this situation would need to maintain a watch also in their rear view mirror, for example. But ideally, the boat driver should concentrate on driving and the observer on observing.
Safety tip #1 The observer must maintain constant vigilance on the skier and immediately transmit any hand signals from the skier to the driver.
Safety tip #2 When the skier is ready to start and yells Hit it! the observer should repeat this to the driver. When the skier falls off the observer should yell He shes off! to the driver.

The only verbal signal a skier usually makes the boat is to yell Hit it! when they are ready to start. This phrase is recommended because it is not easily confused with anything else. A lot of people like to yell Go! but this could be confused with No! resulting in a start when the skier is not ready. The driver should not pull the skier out of the water until they are sure that Hit it! has been called, either directly or via their (trusted) observer.The common hand signals are shown below. But note that the driver is technically in command of the boat so ultimately it is the drivers decision whether or not to follow the signal. Drivers should treat any signal from the skier, other than requests for immediate stop or to change speed, as a request rather than as a command. The driver must determine at all times the best course of action in order to preserve the safety of boat, crew and skier.

It is good practice for the observer or driver to acknowledge hand signals by repeating the signal back to the skier. But if the skier has not signaled, then it is essential that the driver give the skier the appropriate signal before changing speed, direction, etc. This gives the skier warning and allows the skier to adjust their ski until the maneuver is completed.Theres one more signal Ive seen used occasionally, which I think skiers may use to express disapproval of the drivers abilities or perhaps behaviour of others in the boat.

The keyhole turn is made at the end of a slalom course to bring the boat and skier back down through the course. It can also be used for more experienced skiers to give them a ski with minimal wake crossings.In the diagram the boats track and direction is shown by the thicker line. The boat veers to the left (or right) until there is enough room to complete the turn. The turn to the right can be as gentle or as tight as boat, skier and driver will allow, but note that the boat will lose speed in a tight turn, possibly causing the skier to sink awkwardly. As the boat hits the apex of the turn the driver should look back down the boats track to locate its wake and therefore the point to aim for when the boat straightens up going in the opposite direction. In a keyhole turn the skier makes only one crossing of the wake at the end of each keyhole, having otherwise calm water.

Freestyle jumping is often related to show skiing. The goal is to go off the jump, perform one of many stunts, and successfully land back on the water. The most common freestyle stunts in order of usual progression would be a heli (360