Garmin Reactor 40 Steer-by-Wire Autopilot Corepack, For Viking VIPER Steering System, NMEA 2000, 9-Axis AHRS

Overview

The Garmin Reactor 40 Steer-By-Wire Corepack is an autopilot package intended for Viking yachts running the VIPER steer-by-wire steering system, with helm control handled through a compatible Garmin chartplotter and/or a GHC autopilot instrument (depending on the configuration). The core sensor module (CCU) is 91.4 mm in diameter, weighs 5.6 oz (159 g), and is waterproof to IPX7, which suits a below-decks mounting location.

The CCU uses a solid-state 9-axis AHRS and connects on NMEA 2000. NMEA 2000 power input is 9 to 16 V, and the CCU has a NMEA 2000 LEN of 3 (150 mA), which helps when you are planning network power and loads.

Key features

• Built for Viking VIPER steer-by-wire steering systems (not a hydraulic pump kit)
• Solid-state 9-axis AHRS lets the CCU be mounted in almost any orientation and still calibrate properly
• CCU housing is IPX7-rated for wet bilges and washdown-prone compartments
• NMEA 2000 integration for autopilot data sharing and control on the boat network
• NMEA 2000 bus power input of 9 to 16 V; CCU NMEA 2000 LEN 3 (150 mA) for power budgeting
• CCU operating temperature range: -15°C to 55°C (5°F to 131°F)
• Includes an audible buzzer/alarm for autopilot alerts
• Supports onboard control from compatible Garmin devices, including the Reactor autopilot remote and select quatix marine smartwatches when paired with a compatible Garmin chartplotter or GHC 50

Variants

This corepack is offered in multiple configurations so the helm control setup can match what is already installed at your station.

The difference between these part numbers is the included autopilot instrument: GHC 50, GHC 20, or no dedicated autopilot instrument in the box.

• 010-02794-05: Autopilot instrument included: GHC 50. This adds a 5-inch touchscreen autopilot display at the helm for direct control and status without relying on the MFD screen.
• 010-00705-88: Autopilot instrument included: GHC 20. This adds a 4-inch color helm control display that keeps core autopilot functions available on a dedicated screen.
• 010-00705-92: Autopilot instrument not included. Helm control is handled through a compatible Garmin chartplotter on the network, with a dedicated GHC display optional separately.

What’s included

• Reactor 40 CCU (Course Computer Unit)
• CCU cable
• Buzzer
• NMEA 2000 drop cables (2 meters)
• NMEA 2000 power cable
• NMEA 2000 T-connectors
• Male and female terminators
• Documentation

Compatibility and fit

This package is specific to Viking VIPER steer-by-wire steering. If the boat is hydraulic, mechanical cable, or another electronic steering platform, the correct Reactor 40 corepack and steering interface are different.

Plan for helm control up front. If you want a dedicated autopilot screen at the helm, choose a variant that includes a GHC instrument. If you prefer to run autopilot control through an existing compatible Garmin chartplotter, the variant without a GHC instrument keeps the helm hardware simpler.

Installation and setup

The CCU is typically mounted below decks, away from strong magnetic sources and heavy-current wiring. Because the 9-axis AHRS supports flexible orientation, you can usually find a practical location in a dry, accessible space such as under a helm, inside a console, or in a protected machinery-adjacent compartment.

NMEA 2000 cabling and terminators are included for tying into an existing backbone or starting a small segment. After installation, commissioning and calibration are part of bringing any autopilot online, and it is normally done during a sea trial so the unit can learn the boat’s handling.

On-board use

When tied into a compatible Garmin chartplotter, Reactor 40 corepacks support common powerboat and sailing autopilot functions such as heading hold and step turns. Sailing features like wind hold and tack or jibe become available when paired with a wind sensor.

This setup is a good match for Viking owners who do long coastal runs, offshore legs, or trolling days where hands-on steering fatigue adds up, and who want the boat’s VIPER system to be the steering interface rather than adding pumps or extra hydraulics.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

Learn more.

Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

Learn more.

Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

Learn more.