Simrad NAC-3 Core Pack

The Simrad NAC-3 Core Pack is a professional-grade autopilot system engineered for vessel operators who demand reliable, hands-free navigation control in demanding maritime environments. Built as a complete autopilot solution, this core pack integrates three essential components—the high-current NAC-3 autopilot computer, Precision-9 compass module, and RF-25 rudder feedback unit—into a cohesive system trusted by commercial and military marine operators worldwide. Whether you're managing extended ocean passages, coastal operations, or tactical watercraft maneuvers, the NAC-3 delivers the precision steering automation that reduces operator fatigue and improves course stability under varying sea conditions.

The NAC-3 autopilot computer functions as the system's central processing brain, engineered with high-current capacity to drive large rudder actuators and hydraulic steering systems common on medium to large displacement vessels. The integrated Precision-9 compass provides accurate heading reference and compensation for magnetic deviation, critical for maintaining course integrity in global operations. The RF-25 rudder feedback unit monitors actual rudder position in real time, allowing the NAC-3 computer to make continuous micro-adjustments and maintain true heading even when external forces—wind, current, and sea state—attempt to push the vessel off course. This closed-loop feedback architecture ensures responsive steering behavior and fuel-efficient autopilot operation across varying vessel types and load conditions.

The NAC-3 Core Pack is best suited for professional mariners, naval operators, and commercial fleet managers piloting vessels in the 35–100+ foot range where autopilot reliability directly impacts mission success and crew safety. Installation requires integration with compatible steering system hydraulics, rudder actuators, and vessel electrical architecture; professional marine technician support is recommended for initial commissioning. This system pairs seamlessly with Simrad marine display units and navigation ecosystems, offering expanded functionality for route planning, waypoint navigation, and integrated chart display. Weighing 4 lbs in its core configuration, the NAC-3 provides exceptional power density and is designed for permanent marine installation in pilothouse, engine room, or integrated avionics racks.