Tech Specs

In The Box
ECU (Electronic Control Unit)
ECU power cable
Interconnect cable
Shadow Drive
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.
Reviews
Ask a Question
Tech Specs

In The Box
ECU (Electronic Control Unit)
ECU power cable
Interconnect cable
Shadow Drive
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 Reactor 40 Hydraulic Autopilot Without GHC Autopilot Instrument (010-00705-21)
Your Perfect Co-Pilot on the Water
Designed for powerboats, the Reactor 40 Hydraulic Autopilot is your trusted co-pilot, giving you an extra hand to navigate and enjoy the water with ease and confidence.
Key Features
-
Perfect Companion for Hydraulically Steered Systems
This Reactor 40 corepack is ideal for all types of hydraulically steered powerboats — including inboards, outboards, stern drives, and diesels — as well as hydraulically steered sailboats. It ensures smooth, reliable steering without the effort of constantly holding the wheel. -
Solid-State 9-Axis AHRS
Featuring an advanced 9-axis Attitude Heading Reference System (AHRS), the Reactor 40 can be mounted in any orientation and nearly anywhere on your boat. This system reduces power consumption, minimizes heading errors, and provides enhanced reliability while adjusting seamlessly to your conditions on the water. -
Reacts to Sea Conditions
Even in challenging sea conditions, whether your boat is pitching or rolling, the Reactor 40 ensures you stay on course, providing a smooth and stable ride. -
Quick and Simple Calibration
We understand you want to get on the water fast, so we made the calibration process as easy and quick as possible, ensuring you spend less time setting up and more time enjoying your journey. -
Wireless Remote Capabilities
You can control your Reactor 40 autopilot from anywhere on your boat using your compatible Garmin devices. This includes the Reactor autopilot remote, quatix® marine smartwatches, and more. It requires a compatible Garmin chartplotter or the GHC 50 autopilot instrument for full functionality. -
Shadow Drive™ Technology
Shadow Drive technology provides more freedom while maneuvering. It automatically disengages the autopilot when you turn the wheel, giving you more control when needed.
Optional GHC 50 Bundle
- Pair the Reactor 40 with the GHC 50 autopilot instrument for a dedicated touchscreen display that enhances the autopilot experience. This also allows you to share data and settings with your Garmin MFDs and other compatible devices.
Powerboat and Sailing Features
When combined with a compatible Garmin chartplotter, the Reactor 40 offers a range of powerboat and sailing features, including:
- Heading Hold
- Step Turns
- Wind Hold and Tack/Jibe (when paired with a wind sensor, sold separately)
- Follow Route and Auto Guidance+™ features for added convenience and precision navigation.
The Garmin Reactor 40 Hydraulic Autopilot is the perfect solution for any hydraulically steered boat. It simplifies navigation, helps conserve energy, and provides a more comfortable, stable ride, whether you're cruising at high speeds or sailing. If you're looking for a high-performance autopilot system that integrates easily with your Garmin devices, the Reactor 40 is the ideal choice.