Every Captain Needs A Co-pilot
Designed for powerboats and sailboats, the Reactor 40 autopilot gives you the extra hand you need, so you can explore paradise worry-free.
 
Features:
The Reactor 40 mechanical/retrofit/solenoid corepack works with a wide variety of steering systems.
Yes, it features a solid-state 9-axis AHRS. And yes, that means you can mount it nearly anywhere.
Even when you’re pitching or rolling, this autopilot reacts to sea conditions to keep you on course.
You just want to get on the water, so we made calibration fast and easy. That’s the power of simple.
Combine with your compatible Garmin chartplotter, and control your autopilot — from anywhere on your boat.
Want more? The optional GHC™ 50 autopilot instrument enhances your autopilot experience.

Corepack Compatibility
This corepack works with direct or cable-actuated steering systems to support heading hold, wind hold, step turns and tack/jibe modes.
 
Solid-State 9-Axis AHRS
With its advanced solid-state 9-axis AHRS, you can mount Reactor 40 nearly anywhere, in any orientation. It even reduces power consumption, minimizes heading error and more.
 
Reacts to Water Conditions
Hold your course on the sea — this autopilot reacts to conditions, so you can remain confident even when you’re pitching or rolling.
 
Simple Calibration
All autopilots require commissioning and calibration. Reactor 40 makes it quick and easy.
 
Shadow Drive™ Technology
Gain more freedom when maneuvering your boat. On hydraulic installations, this corepack allows for optional Shadow Drive technology to automatically disengage the autopilot when you turn the wheel.
 
Three Class Drives
Choose between class A, class B compact or class B drive units for your steering system (sold separately). All Garmin linear drives include built-in rudder feedback sensing.
 
Wireless Remote Capabilities
Control your autopilot from anywhere on your boat by using your compatible Garmin devices, including the Reactor autopilot remote, select quatix® marine smartwatches and more (requires a compatible Garmin chartplotter or GHC 50 autopilot instrument).