B&G
B&G, Simrad NAC-3 Autopilot Computer
Pickup available at Mercury Yacht Harbour
Usually ready in 2-4 days
Manufacturer-backed extended cover provided by Navico — add up to 3 extra years.
Extended cover is added to your order and confirmed with your warranty documentation.
Description
Simrad NAC-3 Autopilot Computer Only
The high-current NAC-3 autopilot computer is designed for vessels over 10 metres (33 feet) in length, with the ability to run heavy-duty hydraulic drive pumps & linear rams, and also provides solenoid output.
The NAC-3 Autopilot Computer is the brains behind your autopilot system. NAC-3 contains the control algorithms developed to helm a yacht across a broad range of weather conditions and sea-states, alongside the electronics needed to operate a hydraulic or mechanical drive unit, while also interfacing with other components including heading sensors and rudder feedback units. The NAC-3 was designed for boats 10 metres (33 feet) or greater in length and is rated to operate high-current hydraulic drives, mechanical drive units, and solenoid valves with a current rating of 30 Amps continuous (50 Amps peak).
PRODUCT DETAILS
- Reliable autopilot performance based on Simrad Continuum steering technology
- Recommended for boats above 10 metres (35 feet) in length
- High-current output of 30 amps continuous, 50 amps peak
- Clutch output (3 amps maximum)
- Compatible with high-current drive pumps, mechanical drives, hydraulic linear drives, and solenoid valves
- Virtual rudder feedback for simplified installation aboard outboard and sterndrive (inboard/outboard) boats
- Supports Simrad RF25 and RF300 rudder feedback units
- NMEA 2000 connectivity to heading sensors, rudder feedbacks, dedicated autopilot controllers, and multifunction displays
- NMEA 0183 input
- 1 x NAC-3 Autopilot Computer - IPX5
- 4 x Fixing screws
- 1 x Micro-C Drop cable (male) - 0.6 m
- 1 x Micro-C T-Joiner
- 7 x Connectors
- 1 x 30 Amp fuse
- Warranty card & literature pack
No exploded diagram available for this product.
No compatible transducers listed for this product.
No spares or accessories listed for this product.

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Approvals
| Compliance | EMC Directive 2014/30/EU |
Electrical
| Supply Voltage | 12/24 V DC +/- 10-30% |
| Power Consumption (Max) | 750 W |
| Recommended Fuse Rating | 30 A |
| Drive Output | Reversible motor: 30 A continuous, 50 A peak (1s); or on/off solenoid 12/24 V DC, 10 mA to 10 A |
| Engage Output | Bypass/clutch, 12/24 V DC, min 10 mA, max 3 A |
| Alarm Output | External buzzer/relay, max 100 mA, voltage level as local supply |
Connectivity
| NMEA 2000 | 1 Micro-C port, 1 LEN |
| NMEA 0183 | 1 port IN/OUT, 4.8 / 9.6 / 19.2 / 38.4 kbaud |
| Rudder Feedback | Rudder angle frequency input, 15 V, 1.4 to 5 kHz, resolution 20 Hz/degree |
Environment
| Operating Temperature | -25C to +55C (-13F to 131F) |
| Storage Temperature | -30C to +70C (-22F to 158F) |
| Waterproof Rating | IPx5 |
| Humidity | 100% |
| Shock and Vibration | According to EN60945 |
Physical
| Weight | 0.7 kg (1.6 lbs) |
| Dimensions | 211 x 195 x 65.5 mm (8.31 x 7.68 x 2.58 in) |
| Compass Safe Distance | 500 mm (20 inches) |
General
| Recommended Boat Length | 10 metres (33 feet) or greater |
| Warranty | 2 years |
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