Introduction
NAC-2 and NAC-3 autopilot computers
The NAC-2 and NAC-3 autopilot computers contain the electronics
needed to operate a hydraulic steering pump or mechanical drive
unit, while also interfacing with rudder feedback units and NMEA
2000 devices.
The NAC-2 is designed for boats up to 10 metres (33 feet) in length
and is suitable for low-current pumps, mechanical drive units, or
solenoid valves (8 amps continuous/16 amps peak).
The NAC-3 is designed for boats 10 metres (33 feet) or greater in
length and is rated to operate high-current pumps, mechanical
drive units, and solenoid valves (30 amps continuous/50 amps
peak).
Autopilot controllers
The NAC-2 and NAC-3 autopilot computers can be controlled by
various Simrad and B&G control units. This can be dedicated
autopilot controllers (e.g. AP44), Multifunction displays (MFDs) and
autopilot remote controllers (e.g. OP12) used in combination with
instrument systems, or any combination of the above.
Autopilot functions
NAC-2 and NAC-3 include a large range of functions, but not all
autopilot controllers have access to all options. E.g. autopilot
systems including only an autopilot remote controller (without
display unit) do not have access to turn patterns.
The user interface
The autopilot functions are presented slightly different on the
different displays.
This manual shows screen examples from both MFDs and AP44.
Autopilot computer setup
When the autopilot installation is completed, the setup of the
autopilot computer must be performed. Failure in setting up the
autopilot correctly may prohibit the autopilot from functioning
properly.
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Introduction | NAC-2/NAC-3 Commissioning Manual
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