NAC-3 Autopilot Computer

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.

Part Number: 000-13250-001
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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).

Key Features

  • B&G Reflex Sailing algorithms
  • 12/24V input 30A continuous output (50A peak)
  • 3A Clutch output
  • NMEA 0183 Interface (1 input, 1 output)
  • Solenoid output capable
  • Rudder feedback options: NMEA2000 Rudder Feedback (RF25), Freq. Rudder -Feedback (RF300)
  • Solenoid output capable for larger vessels
  • Connection for NFU Remotes
  • External Mode input, External open/close or pulse contact for SYSTEM SELECT
  • External alarm output for buzzer/relay



Temperature, operation

0 to +55°C

Temperature, storage

-32 to +70°C




Weight in Kg

0.7kg (1.6 lbs)

Dimension Max size,
mm (length x width x height)

211 x 196 x 65.5mm (8.31"x7,72"x2.58")







Cable inlet

Grommet (Spare Incl)


1xMicroC (NMEA2000)

Local supply

12/24 V DC +10-30%

NMEA 2000
Load Equivalent number (50mA)



Reversible motor control of rudder

Max continious load 30A, peak 50A for 1s

On/off solenoid control of rudder

12/24V DC, common, load range 10mA to 10A, off current <1mA

Engage output for bypass/clutch

12/24V DC, min 10mA, max 3A

Rudder angle, frequency input

15V, 1.4 to 5kHz, resol. 20Hz/° OR NMEA2000

NFU port/stbd input and
mode indicator output

External open/close contact, common ret, contact current max 30mA

Mode input

External open/close or pulse contact for SYSTEM SELECT, common ret, close to activate, contact current max 30mA

External alarm output
for buzzer/relay

Max 100mA, voltage level as local supply


IEC 61162-1 input (NMEA0183 In)

1 ch

IEC 61162-1 output (NMEA0183 Out)

1 ch

IEC 61162-1 speed

4.8 & 38.4 kbaud


Certified (pending)

1 Item