Garmin GHP Reactor 40 Compact Autopilot System

Garmin GHP Reactor 40 Compact Autopilot System

The Garmin GHP Reactor 40 Compact is a highly responsive autopilot system designed for motorboats and compact steering installations where space is limited but performance still matters. Built around Garmin’s advanced solid-state sensor technology, it delivers smooth, accurate steering with minimal setup, even in demanding sea conditions.

Unlike traditional autopilots, the Reactor 40 Compact uses a 9-axis AHRS (Attitude and Heading Reference System) that constantly measures pitch, roll and yaw. This allows the system to anticipate boat movement and apply precise steering corrections, resulting in noticeably steadier course keeping and reduced helm activity.

Its compact CCU (Course Computer Unit) makes installation easier on smaller motorboats or tight helm spaces, without compromising on control or reliability.

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Key Features

• Solid-State 9-Axis AHRS
  Continuously monitors vessel motion for fast, accurate response.

• Compact Design
  Ideal for boats with limited installation space.

• Quick & Simple Setup
  Automatic calibration and easy sea trial process.

• Smooth, Confident Steering
  Reduces course wandering and over-correction.

• Optional Shadow Drive™
  Instantly take manual control by turning the wheel (optional accessory).

• NMEA 2000® Integration
  Seamless connection with Garmin chartplotters and onboard electronics.

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What’s Included

• Reactor™ 40 Compact CCU

• ECU (Electronic Control Unit)

• NMEA 2000® Drop Cable & T-Connectors

• Documentation and installation hardware

⚠️ Control head and drive unit are sold separately, allowing you to tailor the system to your steering setup.

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Compatibility & Installation

The GHP Reactor 40 Compact is suitable for a wide range of mechanical and hydraulic steering systems when paired with the correct drive unit. Its small footprint makes it especially well-suited to:

• Compact motorboats

• RIBs and sports cruisers

• Boats with limited helm or locker space

Professional installation is recommended, particularly for hydraulic steering systems.

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Ideal For

• Motorboats and power cruisers

• Skippers seeking precise, low-maintenance autopilot control

• Installations where space is at a premium

• Owners upgrading older or less responsive autopilot systems

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Why Choose Garmin?

Garmin autopilots are known for reliability, intuitive integration and excellent steering performance. The Reactor 40 Compact brings these strengths into a smaller, more flexible package—without sacrificing accuracy or confidence at the helm.

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FAQs

Is this autopilot suitable for sailing boats?
No. This version is designed specifically for motorboats.

Does it include a control head?
No. A compatible Garmin control head is required.

Can I override the autopilot instantly?
Yes, with the optional Shadow Drive™ feature.

Is it compatible with Garmin chartplotters?
Yes, via NMEA 2000®.

Is professional installation recommended?
Yes, especially for hydraulic systems.