An extremely portable water ski slalom course that let you enjoy the thrill of slalom skiing at the best spot on the lake, any lake.

It is a boat-mounted device that builds an instant temporary slalom course on the fly. Instead of using buoys, it shows the skier where to turn with a splash on the water surface. The OffCourse™ fires small balls that make a splash on the water surface upon impact, where the buoy normally would be.

The OffCourse™ is first and foremost designed to make your free skiing sessions even more entertaining. However, it can be used as a training tool to improve your timing.

No, since the OffCourse™ originates from the boat there is no need to drive through tight boat guides. It incessantly measures the boat speed and calibrates the distance to the next splash all by itself. The driver needs to communicate with the skier and adjust course width using the calibration program. Watch the instruction video here.

No, the splash often become more visible when the water surface is a little rugged.

Up to 45 consecutive turns depending on which magazines you use. The default mode is 6 turns. However, if you choose the INFINITY program it gives you a total of 24 consecutive turns using the included standard magazines. If you choose to add the optional, longer magazines you can ski up to 45 consecutive turns!

Yes, you need to calibrate course width. Once your OffCourse™ is calibrated you can narrow your course for beginners or warmup sessions, and then get it back to standard width. For more info on width calibration watch the instructions video here.

In the boats traveling direction, the theoretical off-range is roughly 5 inches. Course width accuracy depends on how thoroughly it is calibrated and how weight distribution is handled.

No, not since both sides are individually adjustable. However, it is sensitive to boat weight displacement. Once calibrated you do not want your crew to change seats during a set.

Yes, sort of. Each program starts with a zero ball on the left side that is shot 177 feet before the first “real” ball on the right. That means rounding the zero ball before pulling right makes you pass the wakes where the center of the gates normally would be.


By the boat’s 12-volt outlet and by standard 12-gram CO2 cartridges.

We recommend using the OffCourse™ Projectile which is a paintball with a clear shell and clear fill. The shell is made from 100% virgin gelatine and the fill is 100% PEG. They are fully biodegradable.

The OffCourse™ Projectile Package retails at $47 and is good for 500 turns. One pass through a slalom course with 6 turns is roughly 60 cents.

You can buy projectiles and CO2 cartridges from The Nelson Paint Company in Michigan, they have put together a package with 500 projectiles and 24 CO2 cartridges. They have the OffCourse™ Projectile on the shelf and provide quick shipping. You'll find the OffCourse™ Projectile Package here.

Yes, we have spent a great deal of time and resources to make the OffCourse™ safe to use. For example, it can only be pressurized with CO2 once the markers are in a locked position pointing away from the driver and crew. It does only work within the speed range of 22-38mp/h and if you for some reason miss pushing the STOP button it automatically turns itself off once the boat speed declines. We strongly recommend that you always read the User’s Manual before use.

Yes, in most cases you can. In operation mode, the OffCourse™ is tilted slightly forward which will give your mirror the space it needs. However, some older mid-mounted mirrors need to be moved a little bit to the side.

It is designed to fit modern ski-boats but does fit on a lot of cross-over boats as well. We recommend that you send us a picture of the boat that you intend to use so we can make sure that the OffCourse™ will fit before ordering.