Transform your electronic vessel control system into a precision autopilot solution with the Simrad NAC-D Autopilot Computer (Model 000-15621-001). Engineered specifically for steer-by-wire systems, this digital autopilot computer delivers professional-grade navigation performance with simplified installation and advanced steering algorithms.

Revolutionary Steer-By-Wire Technology

The NAC-D represents the cutting edge of marine autopilot technology, designed exclusively for boats equipped with electronic vessel control systems including SeaStar® Optimus®, Yanmar® VC10/JC10, Volvo® IPS/EVC, and Yamaha® helm master/single-engine control systems. Unlike traditional hydraulic autopilot systems, the NAC-D communicates digitally with your vessel's steering system for precise, responsive control.

Effortless Installation & Setup

Experience the simplicity of professional autopilot installation with just two Micro-C connector connections. The NAC-D eliminates the complexity and cost of traditional autopilot installations by requiring:

• No additional hydraulic pump installation
• No rudder sensor mounting or calibration
• No dockside rudder calibration procedures
• Plug-and-play NMEA 2000 network integration

Advanced Continuum® Steering Technology

Powered by Simrad's proprietary Continuum® steering algorithm, the NAC-D delivers exceptional autopilot performance based on over 70 years of marine navigation expertise. The system automatically switches between dual speed profiles, optimizing steering response for both low-speed maneuvering and high-speed cruising conditions.

SteadySteer™ Feature

The innovative SteadySteer™ functionality allows immediate manual steering intervention without disengaging the autopilot system. Take temporary control for course corrections, then seamlessly return to autopilot mode - perfect for navigating traffic or making quick adjustments.

Comprehensive Navigation Capabilities

Execute sophisticated navigation patterns with professional precision:

• Waypoint Navigation: Direct steering to GPS waypoints
• Heading Hold: Maintain precise compass courses
• Advanced Turn Patterns: U-turns, spiral turns, and custom patterns
• Zigzag Functionality: Automated zigzag patterns for specific navigation requirements
• Track Following: Follow predetermined routes with accuracy

Flexible Control Options

Choose your preferred control interface from Simrad's comprehensive autopilot controller range:

• AP™ 44 Controller: Compact dedicated autopilot control
• AP 48 Controller: Advanced autopilot interface with expanded functionality
• Multifunction Display Integration: Control directly from NSS™ and NSO™ chartplotters

Technical Specifications

Installation & Compatibility

The NAC-D integrates seamlessly with NMEA 2000 marine networks and requires minimal installation time. Professional installation is recommended to ensure optimal system performance and warranty compliance. The unit connects via two Micro-C cables to your vessel's electronic control system and NMEA 2000 backbone.

Professional Marine Heritage

Backed by Simrad's seven decades of marine electronics innovation, the NAC-D autopilot computer incorporates state-of-the-art technology proven in commercial and recreational marine applications worldwide. Every Simrad autopilot system is designed to reduce operator workload, minimize fatigue, and enhance situational awareness for safer, more comfortable voyages.

Safety & Compliance

Engineered to meet stringent marine safety standards, the NAC-D enhances vessel safety by maintaining precise course control in challenging conditions. The system allows operators to focus on navigation planning, traffic monitoring, and situational awareness while the autopilot maintains steering control.