The Garmin Reactor™ 40 Steer-by-wire Standard Corepack with GHC™ 20 Autopilot Instrument (PN: 010-00705-86) is an advanced autopilot solution engineered specifically for powerboats and sailboats equipped with electronic steer-by-wire steering systems, including SeaStar Optimus, Yanmar Marine ZT370, and ZF 2800 Pod drives. Driven by a solid-state 9-axis Attitude Heading Reference System (AHRS), this unit provides flexible orientation mounting while actively minimizing heading errors, course deviations, and overall power consumption even in heavy pitching or rolling conditions. This complete corepack includes the dedicated GHC™ 20 helm control instrument, featuring a bright, glass-bonded 4-inch color display with a 170-degree viewing angle for crisp visibility in both direct sunlight and low-light environments. Seamlessly interfacing via an NMEA 2000® network, the system shares precise heading data across onboard Garmin chartplotters to support MARPA radar tracking, chart overlay, step turns, and Auto Guidance+™ route tracking, alongside optional remote control capabilities via quatix® smartwatches.
In the Box
- Reactor 40 CCU (Course Computer Unit)
- GHC™ 20 helm control display
- CCU cable
- Buzzer
- NMEA 2000® drop cables (2 meters)
- NMEA 2000 power cable
- NMEA 2000 T-connectors
- Male and female terminators
- Documentation


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