This is a Raymarine E70099 Rudder Reference Unit designed to be used on a boat with an autopilot to provide rudder reference position. This top-of-the-line electronics and navigation device is perfect for those looking to replace an rudder reference that may have been damaged, broke, or corroded away (often the case), or adding a rudder reference unit to an existing autopilot.

Unit comes with attaching parts and stainless steel threaded rod and variety of ends for attaching to rudder.