The Garmin Reactor™ 40 Steer-by-Wire Corepack for Viking® VIPER™ with GHC™ 20 Autopilot Instrument (010-00705-88) delivers automated course control tailored specifically for vessels equipped with the Viking Independent Programmable Electro-hydraulic Rudder (VIPER™) steering platform. By establishing a direct CAN-bus interface with the VIPER™ control network via a specialized software gateway, the corepack commands steering adjustments electronically without requiring additional external hydraulic pumps. Powered by a solid-state 9-axis Attitude and Heading Reference System (AHRS), the autopilot dynamically adjusts to sea conditions, minimizing heading error, rudder movement, and power consumption while compensating for pitch, roll, and yaw. System configuration and real-time monitoring are driven by the included GHC™ 20 control unit—a bright, 4-inch glass-bonded color display with anti-glare finishing designed for high visibility from extreme viewing angles. Complete NMEA 2000® integration allows full interoperability with compatible Garmin MFDs, enabling automated route navigation, pattern turns, and Auto Guidance features across the vessel’s network.