NAC-3 Autopilot Computer
In stock
Technical specifications
Technical specifications
| Typical power consumption | Variable, depends on the autopilot drive unit |
| NMEA 2000 Load Equivalency Number (LEN) | 1 |
| Operating voltage | 12/24 V |
| Operating temperature | -25 to +55 °C |
| Recommended fuse rating | 30 A |
| IP rating | IPX5 |
| Bus compatibility | NMEA 2000,NMEA 0183,SimNet |
| Wired network | NMEA 2000, NMEA 0183, SimNet |
| Mounting type | Surface mount |
| Steering modes | Auto, Wind (AWA/TWA), Circle, Zigzag, Sinuous, SteadySteer |
| Drive unit type | Ram, hydraulic pump |
| Dual rudder support | Yes |
| NMEA 0183 baud rate | 4.8, 9.6, 19.2, 38.4 kbauds |
| NMEA 0183 ports | 1 (bidirectional) |
| Storage temperature | -30 to +70 °C |
| Browser-based setup | No |
| Motion correction support | Yes |
| Alarm output | Yes (for external buzzer/relay, max 100 mA) |
| Release year | 2016 |
Detailed description
Detailed description
The Navico NAC-3 autopilot computer is the brain of steering systems designed for larger vessels requiring high-power consumption units. It represents a significant upgrade over the NAC-2, capable of handling hydraulic rams and pumps with a maximum power draw of 750 W and high continuous current, protected by a recommended 30 A fuse.
Steering performance and algorithms
Integrating Navico’s advanced steering algorithms, the NAC-3 is compatible with Simrad, Lowrance, and B&G multifunction displays. It provides precise helm control and supports sophisticated navigation modes, including an intelligent wind mode that switches between apparent wind angle (AWA) and true wind angle (TWA) based on angle. Preprogrammed turning patterns (circle, zigzag) are also available. The computer is compatible with SteadySteer technology for assisted manual control.
Connectivity and system integration
The NAC-3 is designed for seamless integration into both modern and legacy navigation networks. It features a NMEA 2000 port (Micro-C, 1 LEN) for easy communication with sensors and modern displays, as well as a bidirectional NMEA 0183 port (4.8 to 38.4 kbaud). Compatibility with the SimNet network is also ensured for older installations. It accepts a rudder angle sensor (rudder feedback) of variable voltage or resistive type (0-5 V) and includes an output for external alarms (100 mA max).
Design and robustness
Built for the marine environment, the NAC-3’s housing has IPX5 waterproofing, protecting it from water spray. It is certified to EN60945 for shock and vibration resistance. Its operating temperature range is -25°C to +55°C, ensuring reliability in extreme conditions. The computer operates on 12 or 24 V DC and weighs 0.7 kg.
Expert opinion
Expert opinion
Pol CONIN
Digital Manager
« NAC-3: Computing power for high-capacity units »
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