This configuration is a virtual feedback ( no rudder reference) rate compass, 30ci pumpset. SI-TEX has expanded its leading autopilot line-up with the addition of the new-for-2010 SP36 Autopilot. The companys most advanced pilot yet, the new SP36 has been designed to provide a wide range of powerboats and Commercial vessels with sophisticated steering functions and reliable performance under the harshest conditions at sea. IST Auto learning Steering Technology New One Piece 3 Axis Rate Compass Advanced No Drift Mode & Advanced Leeway Control GPS Nav Mode provides precise adaptive track steering Rotary steering & course control knob Auto Setup: Auto Drive Detection, Auto Tune, Auto Compass Cal. SI-TEX SP-36 AUTOMATIC PILOT - Specifications Operating Voltage 11 to 30 vdc Power Consumption Avgerage Pwr. Consumption .5 Amp to 3 Amps Peak DC Hydraulic Pump Output 20 Amps Max. Nav Mode 0.1 Deg. Control Head Dimensions 6.1\"W X 4.4\"H X 1\"D Control Head LCD waterproof, High Resolution Sunlight Viewable Color LCD 320 x 240 pixels Rudder Feedback Standard w/ Virtual Feedback, Optional Rudder Feedbacks available « less