Take the wheel off your to-do list and let Garmin Reactor 40 steer-by-wire corepack handle the navigation for your Yamaha Helm Master system with GHC 50. Built to endure the sea’s demands, this autopilot delivers confident, smooth steering while you focus on the moment—whether you’re cruising, sailing, or maneuvering in rough conditions.

Key features

• Steer-by-wire corepack designed specifically for Yamaha Helm Master systems, pairing seamless control with reliable performance.
• Solid-state 9-axis AHRS enables mounting almost anywhere and maintains accurate heading even when the vessel pitches or rolls.
• Low power consumption helps maximize battery life and efficiency on long passages.
• Fast, easy commissioning setup means you’ll be on autopilot quickly without complicated tuning.
• Control from anywhere on your boat via compatible Garmin chartplotters, Reactor autopilot remote, or select quatix watches (requires chartplotter or GHC 50 instrument).

Why choose Reactor 40 with Yamaha Helm Master

• Autopilot reacts to sea conditions to hold your course, giving you confidence in rough seas or early morning chop.
• Heading hold, step turns, wind hold, and tack/jibe support when paired with a wind sensor (sold separately) for seamless sailing or powerboat operation.
• Auto Guidance+ and Follow Route features enhance planning and navigation while keeping safe navigation practices in mind (Auto Guidance is for planning purposes).
• Integrated with your Garmin ecosystem for synchronized control and enhanced situational awareness on deck.

Compatibility and control

Designed for Yamaha Helm Master systems, Reactor 40 requires a compatible Garmin chartplotter to unlock full control. The GHC 50 autopilot instrument enhances your autopilot experience, bringing intuitive, on-deck visibility to autopilot status and controls. From the helm to the cockpit, manage your autopilot with ease and precision.

Technical specifications

• 3 19/32" (91.4 mm)
• 5.6 oz (159 g)
• 5°F to 131°F (-15°C to 55°C)
• Fully gasketed, high-impact plastic, IPX7 waterproof
• 9.5 ft (3 m)
• 9–16 V
• 3 (150 mA)
• 2.4 oz (68 g) device, 5°F–131°F operating range
• 5 1/8" L x 2 3/8" x 1" (130 mm x 60 mm x 25 mm)
• < 1 oz (28 g)

What's in the box

• Reactor 40 CCU (Course Computer Unit)
• GHC™ 50 helm control display
• Yamaha Gateway CCU cable
• Buzzer
• NMEA 2000 drop cables (2 m)
• NMEA 2000 power cable
• NMEA 2000 T-connectors
• Male and female terminators
• Documentation