PWC's also have a problem with turning. When a PWC is at full speed there is a great amount of force produced by the jet and the vehicle is therefor very difficult to turn. The main way to turn sharply during high speeds is to let of the throttle temporarily. This slows the amount of water flowing through the jet so the jet can be turned. Once the jet is turned the driver can depress the throttle again. Although being very effective this tecneque can also be quite dangerous. When the PWC turns it resists it's change in motion, however the driver does not recieve the same change in motion. The driver's body still wants to continue in the previous path of the PWC. Unless the Driver holds on very hard the driver is likely to fall of the PWC at a very high speed.
As stated earlier when the PWC turns the jet(method of propulsion) changes direction. A diagram can be seen of how this works.