Compact Reactor™ 40 Hydraulic Autopilot Starter Pack

Designed for boats under 25 feet, the Garmin Reactor™ 40 Compact Hydraulic Autopilot is the ideal assistant for hands-free steering and smooth navigation, so you can focus on the journey instead of constantly adjusting your wheel. Whether cruising at speed, fishing, or navigating coastal waters, this autopilot reacts automatically to waves, wind, and motion to maintain your desired heading—even when your boat is pitching or rolling.

Built with Garmin’s solid-state 9-axis AHRS technology, the Compact Reactor adapts to sea conditions, reduces heading error, and can be installed almost anywhere on board thanks to its flexible mounting options. Featuring quick calibration, the system is easy to set up, even on smaller vessels, and integrates seamlessly with compatible Garmin chartplotters for full autopilot control at the helm, on your MFD screen, or through the optional GHC™ 50 autopilot display.

Shadow Drive™ technology, available when installed with the appropriate setup, automatically disengages the autopilot when you turn the wheel, giving you control instantly and re-engaging when you’re ready—ideal for navigating busy marinas or making quick maneuvers. You can also expand your system for remote control using Garmin marine smartwatches, Reactor autopilot remotes, or wireless connectivity when used with select chartplotters.

Perfect for powerboats and compatible with select sailing features, the Reactor 40 can provide heading hold, step turns, wind hold, and tack/jibe features when paired with a wind sensor (sold separately). When connected through Garmin Navionics+™ mapping, it can also support advanced features like Auto Guidance+™ route planning, helping you calculate recommended paths around shallow areas and hazards for safer cruising.

For a full helm integration, pair it with the optional GHC™ 50 touchscreen autopilot instrument, giving you dedicated autopilot controls, data sharing, and seamless network communication with other Garmin installed devices.

From coastal cruising around Vancouver Island to sport fishing, day trips, and weekend adventures, the Garmin Reactor™ 40 Compact Hydraulic Autopilot offers confidence, convenience, and smooth steering—so every captain can enjoy their time on the water, hands-free.