As a replacement for the GHP-20 autopilot Garmin brings an advanced marine technology once only available to commercial boats to the boating public in a complete package designed for powerboats and sailboats. The GHP Reactor 40 autopilot series is simply the most responsive autopilot system Garmin have ever offered. Experience the ultimate hydraulic autopilot performance when paired with the high reliability brushless SmartPumpV2. With its advanced  solid-state 9-axis Attitude Heading Reference System (AHRS), this new system greatly minimizes heading error, course deviation, rudder movement and power consumption.