Simrad NAC-D Autopilot Computer f/Steer By Wire [000-15621-001]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