Garmin Reactor 40 Steer-by-wire Corepack f/Yamaha Helm Master
Garmin Reactor 40 Steer-by-wire Corepack f/Yamaha Helm Master — Product description
Experience Effortless Steering with Advanced Autopilot Precision
Imagine gliding across choppy waters without constantly fighting the helm. The Garmin Reactor 40 steer-by-wire corepack tailored for Yamaha Helm Master systems delivers exactly that—seamless, responsive control that adapts to every wave and gust. Designed for both powerboats and sailboats, this system brings commercial-grade autopilot performance to recreational boating, letting you focus on the journey rather than the corrections.
What sets it apart? Its solid-state 9-axis Attitude Heading Reference System (AHRS) senses motion in all directions, mounting almost anywhere on your vessel. This means tighter heading holds, smoother rides, and less wear on your steering gear, all while sipping power efficiently.
Versatile Features for Every Boating Adventure
Whether you're cruising open water, trolling for fish, or tacking through a regatta, this autopilot handles it all. Powerboat modes include heading hold and step turns for precise maneuvers. Sailors benefit from wind hold, automated tacks, and jibes that feel intuitive and natural.
- Sea-State Intelligent (SSI) Technology: Automatically adjusts to boat pitch and roll, minimizing course deviation even in rough conditions.
- Low Power Draw: Optimized for long days on the water without draining batteries.
- Shadow Drive Handling (with compatible setups): Hands-on override that seamlessly transitions back to autopilot mode.
Boaters rave about how it transforms fatiguing passages into relaxing outings, especially on longer trips where steady course-keeping prevents skipper burnout.
Seamless Integration into Your Yamaha Setup
Engineered specifically for Yamaha Helm Master systems—excluding Helm Master EX—this corepack slots right into your existing digital switching world. Connect via NMEA 2000 for shared data with Garmin chartplotters, enabling radar overlays, chart autopilot paths, and group tracking.
Control from multiple stations with up to three GHC 20 displays, or go hands-free with compatible Garmin smartwatches. Add a wireless remote for ultimate flexibility, and watch your boat respond instantly to commands from anywhere onboard.
Quick Setup for More Time on the Water
No marathon calibration sessions here. Basic commissioning takes minutes, thanks to the intuitive interface and smart sensors. Mount the compact Course Computer Unit (CCU) in tight spaces—it's fully sealed against saltwater and impacts. Pair it with the buzzer for audible alerts, and you're ready to test in calm conditions before heading out.
Real-world tip: Position the AHRS away from magnetic interference for pinpoint accuracy from the start.
Built Tough for Marine Demands
Rated IPX7 waterproof, this system thrives from freezing temps to scorching heat. High-impact plastics shrug off knocks, while the gasketed design keeps moisture out. Voltage flexibility (9-16V) ensures reliable operation across battery setups.
What's Included in Your Corepack
- Reactor 40 Course Computer Unit (CCU)
- GHC 20 helm control display
- Yamaha Gateway for seamless integration
- CCU cable and buzzer
- NMEA 2000 essentials: drop cables, power cable, T-connectors, terminators
- Full documentation
Technical Specifications at a Glance
| Component | Key Specs |
|---|---|
| CCU | 3 19/32" diameter; -15°C to 55°C; IPX7; 9.5 ft cable; NMEA 2000 LEN 3 |
| Buzzer/Alarm | 29/32" x 1"; 10 ft cable; same temp range |
| GHC 20 Display | 4.3" x 4.4" x 1.9"; 320x240 QVGA LCD; 170° viewing; IPX7; LEN 7 |
| Gateway | 5 1/8" x 2 3/8" x 1" |
Frequently Asked Questions
Is the Garmin Reactor 40 compatible with all Yamaha Helm Master systems?
It's designed for Yamaha Helm Master systems but not compatible with Helm Master EX. Confirm your setup for seamless integration.
How does the 9-axis AHRS improve autopilot performance?
The solid-state 9-axis AHRS tracks heading, pitch, roll, and yaw in real-time, allowing flexible mounting and superior course holding in rough seas compared to traditional gyros.
What's the setup process like for this corepack?
Minimal commissioning and calibration—often completed in under 30 minutes. Connect via NMEA 2000, run sea trials, and fine-tune as needed.
Can it handle both powerboats and sailboats?
Yes, versatile corepack includes modes for heading hold, wind hold, tacks, jibes, and step turns, suiting diverse vessels.
Does it integrate with Garmin chartplotters?
Fully integrates via NMEA 2000 for autopilot control, MARPA radar overlays, and optional Auto Guidance paths (with compatible charts).
How many control units can I use?
Up to three GHC 20 displays, plus wireless remotes or smartwatches for multi-station control.
Is it suitable for rough water conditions?
Absolutely—SSI technology reacts to waves, reducing rudder movement and maintaining course even when pitching or rolling.
Why Boaters Choose Reactor 40 for Yamaha
Upgrade to a system that anticipates your needs, enhances safety with consistent steering, and unlocks new levels of onboard comfort. From weekend warriors to serious offshore adventurers, it's the autopilot that keeps you on course—literally.
Reactor 40 for steer-by-wire provides robust autopilot capabilities for Yamaha Helm Master systems. With a complete package designed for powerboats and sailboats, Garmin brings an advanced marine technology to the boating public that was once only available for commercial boats. The Reactor 40 autopilot series is simply the most responsive autopilot system we have ever offered. Reactor 40 autopilots are very versatile. Both powerboat and sailing features are available in all corepacks, including heading hold, wind hold, tack and jibe, step turns and more. This amazing autopilot actually reacts to the sea to hold your course. Even when the boat is pitching and rolling, you can remain confident that the Reactor 40 autopilot will keep you on your desired course.
Garmin 100070587 Attributes
- Compatibility: Yamaha Helm Master Systems With Complete Package Designed For Powerboats And Sailboats
- Dimension: CCU 3-19/32 Inch Diameter, Buzzer/Alarm 29/32 Inch Length x 1 Inch Diameter
- Voltage Rating: 9 To 16 Volt
Garmin 100070587 Features & Benefits
- Solid-State 9-Axis Attitude Heading Reference System
- Minimal Commissioning And Calibration
- Minimizes Heading Error, Course Deviation, Rudder Movement And Power Consumption While Providing A Comfortable Ride
- Fully Gasketed, High-Impact Plastic, Waterproof To IEC 529 IPX7 Standards
- Limited 1 Year Warranty
Garmin 100070587 Installation Instructions
- GHP_Reactor_SBW_Yamaha_Addendum_ML.pdf
- Technical_Reference_for_Garmin_NMEA_2000_Products_EN-US (2).pdf
- GHC_20_OM_EN-US.pdf
- GHC_GMI20_Flush_Mount_Template.pdf
- Reactor_40_Steer-by-Wire_Configuration_Guide_EN (1).pdf
Garmin 100070587 Warranties
Garmin 100070587 Technical Bulletins
Reactor 40 Steer-by-wire Corepack for Yamaha Helm Master
** Not compatible with Helm Master EX **
Garmin's Most Responsive Autopilot System on the Water
- Solid-state 9-axis Attitude Heading Reference System (AHRS)
- Minimizes heading error, course deviation, rudder movement and power consumption while providing a comfortable ride
- Minimal commissioning and calibration
The Reactor 40 for steer-by-wire provides robust autopilot capabilities for Yamaha Helm Master systems. With a complete package designed for powerboats and sailboats, Garmin brings an advanced marine technology to the boating public that was once only available for commercial boats. The Reactor 40 autopilot series is simply the most responsive autopilot system we have ever offered.
Reactor 40 autopilots are very versatile. Both powerboat and sailing features are available in all corepacks, including heading hold, wind hold, tack/jibe, step turns and more.
Solid-state 9-axis AHRS
With its advanced solid-state 9-axis AHRS, you can mount Reactor 40 nearly anywhere, in any orientation. In addition, this system greatly minimizes heading error, course deviation, rudder movement and power consumption while providing a comfortable ride for all on board.
Reacts to Conditions
This amazing autopilot actually reacts to the sea to hold your course. Even when the boat is pitching and rolling, you can remain confident that the Reactor 40 autopilot will keep you on your desired course.
Minimal Commissioning and Calibration
All autopilots require commissioning and calibration all of them. We know you just want to get on the water, so we made this process as fast and easy as possible. That's the power of simple.
Full Integration with Garmin Chartplotters
Combined with a compatible Garmin networked chartplotter, you can have full control of Reactor 40 from wherever you are on the boat. In addition to holding its course in virtually all weather and wind conditions, the system can smoothly perform a variety of preprogrammed trolling and search procedures. Plus, with a compatible Garmin networked chartplotter and BlueChart g2 Vision charts (sold separately), you gain optional features such as Auto Guidance, which automatically steers GPS paths.
Connect to Networked Devices
The Reactor 40 autopilot is operated using up to 3 GHC helm control units. GHC communicates with the autopilot system via your NMEA 2000 network, so autopilot heading data can be shared easily with other devices. This enables MARPA and chart overlay when connected to a Garmin chartplotter. An optional handheld wireless remote control is also available; however, for the highest level of convenience, control the using a compatible quatix 3 or quatix 5 marine multisport smartwatch.
In The Box:
- Reactor 40 CCU (Course Computer Unit)
- GHC 20 helm control display
- Yamaha Gateway
- CCU cable
- Buzzer
- NMEA 2000 drop cables (2 meters)
- NMEA 2000 power cable
- NMEA 2000 T-connectors
- Male and female terminators
- Documentation
1Auto Guidance is for planning purposes only and does not replace safe navigation operations.
Garmin Reactor 40 Steer-by-wire Corepack for Yamaha Helm Master
Model: 010-00705-87- Solid-state 9-axis Attitude Heading Reference System (AHRS)
- Minimizes heading error, course deviation, rudder movement and power consumption while providing a comfortable ride
- Minimal commissioning and calibration
Reactor 40 for steer-by-wire provides robust autopilot capabilities for Yamaha Helm Master systems. With a complete package designed for powerboats and sailboats, Garmin brings an advanced marine technology to the boating public that was once only available for commercial boats. The Reactor 40 autopilot series is simply the most responsive autopilot system we have ever offered.
Reactor 40 autopilots are very versatile. Both powerboat and sailing features are available in all corepacks, including heading hold, wind hold, tack/jibe, step turns and more.
With its advanced solid-state 9-axis AHRS, you can mount Reactor 40 nearly anywhere, in any orientation. In addition, this new system greatly minimizes heading error, course deviation, rudder movement and power consumption while providing a comfortable ride for all on board.
This amazing autopilot actually reacts to the sea to hold your course. Even when the boat is pitching and rolling, you can remain confident that the Reactor 40 autopilot will keep you on your desired course.
All autopilots require commissioning and calibration — all of them. We know you just want to get on the water, so we made this process as fast and easy as possible. That’s the power of simple.
Combined with a compatible Garmin networked chartplotter, you can have full control of Reactor 40 from wherever you are on the boat. In addition to holding its course in virtually all weather and wind conditions, the system can smoothly perform a variety of preprogrammed trolling and search procedures. Plus, with a compatible Garmin networked chartplotter and BlueChart® g2 Vision® charts (sold separately), you gain optional features such as Auto Guidance , which automatically steers GPS paths.
The Reactor 40 autopilot is operated using up to 3 GHC™ helm control units. GHC communicates with the autopilot system via your NMEA 2000® network, so autopilot heading data can be shared easily with other devices. This enables MARPA and chart overlay when connected to a Garmin chartplotter. An optional handheld wireless remote control is also available; however, for the highest level of convenience, control the using a compatible quatix® 3 or quatix 5 marine multisport smartwatch.
| CCU Specifications | |
| Dimensions | 3 19/32 in. diameter (91.4 mm) |
| Temperature range | From 5°F to 131°F (from -15°C to 55°C) |
| Case material | Fully gasketed, high-impact plastic, waterproof to IEC 529 IPX7 standards |
| CCU cable length | 9.5 ft. (3 m) |
| NMEA 2000 power input | 9-16V |
| NMEA 2000 LEN | 3 (150 mA) |
| Buzzer/Alarm Specifications | |
| Dimensions (L Diameter) | 29/32 in. 1 in. (23 mm 25 mm) |
| Temperature range | from 5°F to 131°F (from -15°C to 55°C) |
| Cable length | 10 ft. (3.0 m) |
| GHC 20 Specifications | |
| Unit dimensions, WxHxD | 4.3 " x 4.4 " x 1.9 " (10.9 x 11.2 x 4.8 cm) |
| Display resolution, WxH | 320 x 240 pixels |
| Display type | QVGA color LCD display |
| NMEA output | NMEA 0183, NMEA 2000® |
| Supply voltage | Powered by NMEA 2000 bus, 9-16 VDC, units operate up to 32 VDC |
| Operating temperature | -15° C to 70 C° (5° F to 158° F) |
| Max power consumption | 3W |
| Viewing angle | 170° |
| Brightness | 1200 cd/m2 (NIT) |
| Water rating | IPX7 |
| NMEA 2000 LEN (Load Equivalency Number) | 7 (350 mA at 9VDC) |
| Autopilot Gateway Specifications | |
| Dimensions (L Diameter) | 5 1/8" 2 3/8" x 1" (130 mm 60 mm x 25 mm) |
What's 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
- Yamaha Gateway
The GHC helmet control unit is used to control the reactor 40. The control unit communicates with the autopilot system through the Nmea 2000 bus, so the autopilot heading data can be easily shared with other devices. When connected to a Garmin plotter, this will enable Marpa and chart overlays. Up to three GHC controllers can be connected to a single reactor 40. There are complete kits designed for motor boats and sailing boats. Reactor 40 is used in conjunction with a compatible networked chartplotter to provide full control no matter where you are on the ship. In addition to keeping the heading out in almost all weather and wind conditions, the system can also smoothly execute various pre-programmed trolling and search procedures. The Reactor 40 autopilot is very versatile. All core components provide motorboat and navigation functions, including heading keeping, wind keeping, tack/jib, turning, etc.
SKU: NVN-69279
MPN: 010-00705-87
UPC: 753759189440
Technical specifications
| Brand | Garmin |
| Model | Garmin Reactor 40 Steer-by-wire Corepack f/Yamaha Helm Master |
| SKU / MFR# | 69279 |
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Frequently asked questions
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