Tech Specs
In The Box
Reactor 40 CCU (Course Computer Unit)
1.0 L Pump
ECU (Electronic Control Unit)
ECU power cable
Interconnect cable
Buzzer
NMEA 2000® drop cables (2 meters)
NMEA 2000 power cable
NMEA 2000 T-connectors
Male and female terminators
Documentation
Manual & Warranty
Do you have an old GPS unit lying around? The GPS Nation Trade In and Up program is a great way to trade in your old and used GPS for credit towards a new GPS. The choice is entirely yours! We’ve made the process simple and streamlined. Follow these simple steps, and you will be on your way to receiving credit towards your brand new GPS!
1. Get a quote
To get your free quote, provide your GPS type, manufacturer, model, and condition. Within 24 hours, you will receive a quote for the trade-in value of your current product. The GPS trade-in/trade-up form is at the bottom of this page.
2. Ship your product(s) for trade
After accepting our offer, pack your product(s) safely and ship them to us using the pre-paid shipping label provided to you. We will provide a confirmation email when your trade-in arrives at our warehouse. You have 30 days from the date you complete your on-line trade to ship the product to GPS Nation.
3. Make your purchase
Once we receive your product at our warehouse and we validate the stated condition, we will send you a confirmation email. If you elect to receive credit towards a new GPS at gpsnation.com, your store credit will be issued, and you are free to make your purchase.
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Tech Specs
In The Box
Reactor 40 CCU (Course Computer Unit)
1.0 L Pump
ECU (Electronic Control Unit)
ECU power cable
Interconnect cable
Buzzer
NMEA 2000® drop cables (2 meters)
NMEA 2000 power cable
NMEA 2000 T-connectors
Male and female terminators
Documentation
Manual & Warranty
Trade-In
Do you have an old GPS unit lying around? The GPS Nation Trade In and Up program is a great way to trade in your old and used GPS for credit towards a new GPS. The choice is entirely yours! We’ve made the process simple and streamlined. Follow these simple steps, and you will be on your way to receiving credit towards your brand new GPS!
1. Get a quote
To get your free quote, provide your GPS type, manufacturer, model, and condition. Within 24 hours, you will receive a quote for the trade-in value of your current product. The GPS trade-in/trade-up form is at the bottom of this page.
2. Ship your product(s) for trade
After accepting our offer, pack your product(s) safely and ship them to us using the pre-paid shipping label provided to you. We will provide a confirmation email when your trade-in arrives at our warehouse. You have 30 days from the date you complete your on-line trade to ship the product to GPS Nation.
3. Make your purchase
Once we receive your product at our warehouse and we validate the stated condition, we will send you a confirmation email. If you elect to receive credit towards a new GPS at gpsnation.com, your store credit will be issued, and you are free to make your purchase.
Overview
Garmin Compact Reactor 40 Hydraulic Autopilot with GHC 50 Instrument Pack
Introduction
The Garmin Compact Reactor 40 Hydraulic Autopilot with GHC 50 Instrument Pack (model 010-02794-07) delivers precision steering control for single-engine outboard boats under 25 feet. Unlike traditional wheel-steering systems, this autopilot maintains your heading automatically while adapting to changing water conditions, eliminating manual correction adjustments during cruising and allowing you to focus on navigation and enjoying the water. The system pairs with a 5-inch GHC 50 touchscreen display that integrates seamlessly with Garmin chartplotters and wireless navigation devices.
Key Features
- Solid-State 9-Axis AHRS (Attitude and Heading Reference System) with flexible mounting in any orientation
- Automatic Water Condition Response that adapts steering pressure to sea state and wave activity
- 30% increase in steering accuracy compared to conventional autopilot systems
- Heading Hold and Wind Hold modes for adaptive course tracking in variable conditions
- Wireless remote control integration with compatible Garmin chartplotters and handheld devices
- Optional Shadow Drive™ Technology that disengages the autopilot when manual steering is applied
- GHC 50 touchscreen instrument pack with integrated navigation display and route planning visualization
- Simplified installation and calibration process with minimal setup time required
Data Insights
Performance testing confirms the Reactor 40 maintains heading accuracy 30% better than legacy autopilot technology, significantly reducing drift in cross-currents and beam seas. The solid-state AHRS architecture consumes less power than traditional mechanical systems while delivering real-time adaptive corrections based on vessel speed and water conditions. Integration with Garmin's ecosystem enables live data sharing between autopilot, chartplotter, and navigation systems, creating a cohesive command center for your vessel.
Usage Instructions
Before operating, complete the system calibration procedure through the GHC 50 touchscreen—a process that takes approximately 10-15 minutes. Mount the control unit and hydraulic pump securely on your transom, ensuring cable runs remain clear of moving engine parts and heat sources. Connect the helm pump to your boat's hydraulic steering system, then link the GHC 50 display to your Garmin chartplotter via network cable or wireless connection. Once connected, activate autopilot mode through the display interface and verify heading hold engages smoothly before operating at cruising speed.
Design & Material
The Compact Reactor 40 system uses a modular architecture that fits tight engine compartments and console spaces without sacrificing steering response. All components employ marine-grade stainless steel and UV-resistant polymers designed to withstand salt spray, high humidity, and prolonged sun exposure. The GHC 50 display features a bonded touchscreen that remains responsive in wet conditions and direct sunlight.
- Compact control module dimensions minimize installation footprint in engine compartments under 25 feet
- Marine-grade stainless steel fasteners and hardware resist corrosion in saltwater environments
- Sealed cable connectors rated for IP67 water ingress protection standards
- Lightweight aluminum and reinforced polymer construction reduces overall system weight
- GHC 50 display housing is weather-sealed with an anti-glare bonded touchscreen
- Tool-free mounting brackets accommodate various console configurations and transom angles
Final Verdict
The Garmin Compact Reactor 40 with GHC 50 is the most practical autopilot solution for outboard boat owners who demand both automated steering reliability and integration with modern navigation technology. The 30% accuracy improvement over conventional systems, combined with adaptive water-condition response and wireless control, transforms your boating experience from constant manual steering to confident, hands-free cruising. For boats under 25 feet running single outboards, this system eliminates fatigue on long runs while maintaining precise heading control in variable sea states. Install the Reactor 40 today and reclaim hours of comfort on the water.

Garmin Warranty