Upgrade your boat’s autopilot with the Garmin Reactor 40 Mechanical Retrofit Corepack with GHC50 — a compact, solid-state solution for powerboats and sailboats that delivers precise course control in challenging conditions.
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Solid-state 9‑axis AHRS core: Reliable attitude data for accurate autopilot responses, even in pitching or rolling seas.
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Broad steering compatibility: Works with direct or cable-actuated steering systems and supports class A, class B compact, or class B drives (drives sold separately).
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Built-in rudder feedback: Improves control accuracy with rudder feedback sensing; optional GRF 10 rudder feedback sensor available (requires GHC50 or compatible chartplotter).
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Control options: Remote and onboard control from anywhere on the boat using Garmin devices, including the Reactor autopilot remote and select quatix marine smartwatches (requires compatible chartplotter or GHC50 instrument).
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GHC50 integration: Pair with the GHC50 autopilot instrument for a dedicated touchscreen helm display and centralized data sharing with Garmin MFDs and other devices.
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Wind, route, and Auto Guidance+ support: When paired with a wind sensor, enables wind hold, tack/jibe modes, route following, and Auto Guidance+ planning assistance (planning use; does not replace safe navigation).
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Shadow Drive readiness: Ready for hydraulic installations; Shadow Drive automatically disengages the autopilot when you turn the wheel for full manual control.
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Remote and onboard control ecosystem: Seamless data sharing and helm management across Garmin chartplotters, MFDs, and compatible devices.
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Power and environmental specs: 10 V to 30 V supply; operating temperature −15°C to 60°C.
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Current handling: Maximum sustained motor current 15 A; maximum instantaneous motor current 40 A; maximum clutch current 2.5 A (higher-current clutches require a relay in the clutch circuit).
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Physical dimensions and weight: CCU 4.3" x 4.4" x 1.9"; ECU 6.6" x 4.6" x 2.1"; weight 2.4 oz (68 g); cable length 10 ft (3.0 m).
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Drives sold separately: System is designed to work with a broad range of steering setups; drives are sold separately.
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Quick commissioning: Engineered for fast setup and reliable performance with flexible mounting options to minimize heading error and power consumption.
The Reactor 40 retrofit corepack delivers steady course keeping in rough seas while offering flexible mounting and broad compatibility. When paired with the GHC50, enjoy a cohesive, touchscreen helm experience and streamlined data sharing across Garmin devices. Wind-aware routing, manual override via Shadow Drive, and remote/onboard control expand how you navigate, plan, and manage helm duties—making it a thoughtful, future-ready upgrade for serious sailors and power voyagers alike.
| CCU dimensions: 4.3" x 4.4" x 1.9" (10.9 x 11.2 x 4.8 cm)CCU dimensions |
4.3" x 4.4" x 1.9" (10.9 x 11.2 x 4.8 cm) |
| ECU dimensions |
6.6" x 4.6" x 2.1" (16.8 x 11.7 x 5.3 cm) |
| Supply voltage |
10 V to 30 V |
| Operating temperature |
-15° C to 60 C° (5° F to 140° F) |
| Maximum sustained motor current |
15A |
| Maximum instantaneous motor current |
40A |
| Maximum clutch current |
2.5A (for drives requiring higher current than 2.5A, a relay needs to be added to the clutch circuit) |
| Buzzer/Alarm Specifications |
| Dimensions (L Diameter) |
29/32" 1" (23 mm 25 mm) |
| Weight |
2.4 oz (68 g) |
| Temperature range |
from 5°F to 131°F (from -15°C to 55°C) |
| Cable length |
10 ft (3.0 m) |
