Garmin's Most Responsive Autopilot System on the Water Solid-state 9-axis Attitude Heading Reference System (AHRS)Minimizes heading error, course deviation, rudder movement and power consumption while providing a comfortable ride. Minimal commissioning and calibrationPatented Shadow Drive technology keeps you in control, even when autopilot is engaged. With a complete package designed for powerboats and sailboats, Garmin brings an advanced marine technology to the boating public that was once only available for commercial boats. The Reactor 40 autopilot series is simply the most responsive autopilot system we have ever offered. Reactor 40 autopilots are very versatile. Both powerboat and sailing features are available in all corepacks, including heading hold, wind hold, tack/jibe, step turns and more; simply pick the autopilot thats compatible with your existing steering system. Solid-state 9-axis AHRSWith its advanced solid-state 9-axis solid-state 9-axis AHRS, you can mount Reactor 40 nearly anywhere, in any orientation. In addition, this new system greatly minimizes heading error, course deviation, rudder movement and power consumption while providing a comfortable ride for all on board. Reacts to ConditionsThis amazing autopilot actually reacts to the sea to hold your course. Even when the boat is pitching and rolling, you can remain confident that the Reactor 40 autopilot will keep you on your desired course. Minimal Commissioning and CalibrationAll autopilots require commissioning and calibration — all of them. We know you just want to get on the water, so we made this process as fast and easy as possible. Thats the power of simple. Full Integration with Garmin ChartplottersCombined with a compatible Garmin networked chartplotter, you can have full control of Reactor 40 from wherever you are on the boat. In addition to holding its course in virtually all weather and wind conditions, the system can smoothly perform a variety of preprogrammed trolling and search procedures. Plus, with a compatible Garmin networked chartplotter and BlueChart g2 Vision charts (sold separately), you gain optional features such as Auto Guidance¹, which automatically steers GPS paths. Stay in Control with Shadow Drive