Take the helm with confidence. The Garmin Compact Reactor 40 Autopilot with GHC 50 is a compact hydraulic autopilot designed for small craft, delivering precise course hold and reliable performance on boats under 25 feet with a single outboard engine. It integrates seamlessly into the Garmin ecosystem for easy setup and control.
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Compact footprint: Unit 4.3" W x 4.4" H x 1.9" D; Pump 6.6" L x 3.9" W x 3.3" H — designed to fit tight helm spaces.
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Hydraulic autopilot for small boats: Corepack built for boats less than 25 feet with a single‑engine outboard setup.
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Solid-state 9-axis AHRS: Mountable in any orientation, reduces heading error, and conserves power.
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GHC 50 helm control display included: Central control for engaging and tuning the autopilot (with compatible Garmin devices).
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Remote control and Garmin ecosystem integration: Operate from the Reactor autopilot remote, the GHC 50, or select quatix marine smartwatches (requires compatible chartplotter or GHC 50).
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Sea-state awareness: Autopilot adjusts for pitching or rolling to help keep you on course at speed.
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Shadow Drive compatibility: Optional feature to automatically disengage autopilot when you turn the wheel for manual maneuvering.
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Navigation and performance with Garmin chartplotter: Heading hold, step turns, wind hold, tack/jibe with a wind sensor, follow route, and Auto Guidance+ for planning (Auto Guidance is for planning purposes and does not replace safe navigation).
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Designed for simple, reliable installation: Flexible mounting options and quick commissioning for easy setup.
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Electrical and environmental specs: Supplies 10–20 V DC; operating temperature from -15°C to 70°C (5°F to 158°F).
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Included components: GHC 50 helm control display; Reactor 40 CCU; 1.0 L Pump ECU; ECU power cable; interconnect cable; buzzer; NMEA 2000 drop cables (2 m); NMEA 2000 power cable; NMEA 2000 T-connectors; male and female terminators; documentation.
The Garmin Compact Reactor 40 corepack delivers dependable autopilot performance, seamless Garmin ecosystem integration, and the freedom to enjoy more time on the water with precise steering support, flexible control options, and robust connectivity across your Garmin devices.
| Unit dimensions, WxHxD |
4.3 " x 4.4 " x 1.9 " (10.9 x 11.2 x 4.8 cm) |
| Pump dimensions, LxWxH |
6.6 " x 3.9 " x 3.3 " (16.8 x 10.0 x 8.5 cm) |
| NMEA output |
NMEA 2000 |
| Supply voltage |
10V to 20V |
| Operating temperature |
-15° C to 70 C° (5° F to 158° F) |