RF25N Rotary Rudder Feedback by Simrad®. The RF25 is a medium duty rudder feedback unit with Micro-C interface. The RF25 will attach directly to industry standard Micro-C systems for straight-forward installation. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at an affordable cost.