Thanks to the Course-Keeper from Sprenger, the steering effectiveness of your boat improves significantly at low speeds. It's a well-known problem that boats with outboard or sterndrives have poor steering characteristics at low speed. There is too little motive power to keep the boat on course, and you have to make constant course corrections. With the Course-Keeper, you have a dual rudder available to keep the boat on course, making it almost as easy to steer and "park" as a car. The Course-Keeper eliminates the need for constant course correction, and significantly improves steering ability and course stability at low speeds. As speed increases, the Course-Keeper lifts out of the water stream and oversteering is prevented. Installation is simple. No holes need to be drilled. The brackets are bolted to the cavitation plate and clamped in place. When reversing, the Course-Keeper protects the propeller. Safety against injury for swimmers is greatly increased. The rudder blades and brackets are made of non-corrosive aluminum. All connecting materials such as threaded rods, bolts and nuts are made of stainless steel and the simple and solid construction of the rudder makes the Course-Keeper maintenance-free.