NAC-D Autopilot Computer for Steer By Wire
NAC-D is a steer-by-wire autopilot solution for Electronic Vessel Control Systems (steering systems with a digital interface).
With NAC -D, boaters with SeaStar® Optimus®, Yanmar® VC10/JC10, Volvo® IPS/EVC or Yamaha® helm master/single-engine control systems can benefit from all the full features and performance of Simrad® autopilots.
Easy to install
Requires only the connection of two Micro-C connectors – there is no requirement for an additional hydraulic pump, rudder sensor installation, or dockside rudder calibration. This saves boaters time and money.
Automatic switching
Featuring Continuum® steering and support for the SteadySteer™, the NAC -D allows automatic switching between two-speed profiles delivering optimal steering performance at both low and high speeds.
Flexible choice
Choose the controller to suit your preference from dedicated controllers like the AP™ 44 or AP 48.
Simrad® autopilot systems incorporate state-of-the-art electronics and represent over 70 years of experience and development. Simrad® autopilots can reduce your workload and fatigue and improve your situational awareness and safety, helping you arrive fresher at your destination.
Features
- SeaStar Solutions®, Volvo®, Yanmar® and Yamaha® approved control system interface
- Control via AP™ 44, AP 48
- No need for an additional hydraulic pump, rudder sensor, or dockside calibration
- SteadySteer™ feature included
- Steer to a waypoint, heading, or set turn pattern, such as a U-turn, Spiral turn, and many more – the NAC™ -D can even initiate a zigzag turn
- CAN-bus data connectivity – connection to Optimus® steering systems via the CAN-bus data network
Specifications:
- Steering Type: Steer-By-Wire
- Box Dimensions: 3″H x 4″W x 10″L WT: 0.5 lbs
- UPC: 9420064115747
Owner’s Manual (pdf)

![Furuno HRP11-12 Autopilot Pump [PUMPHRP11-12]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/furuno-hrp11-12-autopilot-pump-pumphrp11-12.webp)
![SI-TEX SRA-1 Rudder Indicator f/Use w/SP70 80 [SRA-1]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/si-tex-sra-1-rudder-indicator-f-use-w-sp70-80-sra-1.webp)
![Raymarine ST4000MK2/ST4000+ Wheel Drive Only *Not A Complete Pilot [E12093]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/raymarine-st4000mk2-st4000-wheel-drive-only-not-complete-pilot-e12093.webp)
![Garmin Interconnect Cable (Steer-by-Wire) [010-11351-50]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/garmin-interconnect-cable-steer-by-wire-010-11351-50.webp)
![Raymarine Type 1 Linear Drive - 12V [M81130]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/raymarine-type-1-linear-drive-12v-m81130.webp)
![Garmin CCU Extension Cable 5M [010-11156-30]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/garmin-ccu-extension-cable-5m-010-11156-30.webp)
![Simrad LF3000 Linear Feedback [20188074]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/simrad-lf3000-linear-feedback-20188074.webp)
![Garmin GRF 10 Extension Cable - 15M [010-11829-02]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/garmin-grf-10-extension-cable-15m-010-11829-02.webp)