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"GRUPO INDUSTRIAL BACA, S.A. DE C.V." AV. RETORNO DEL AGUILA CORONADA NO. 19090-1 FRACC. INDUSTRIAL BAJA MAQ. EL AGUILA, TIJUANA B.C. CP 22575
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The warranty card is supplied as a separate document. Dockside 10 In case of any queries, refer to the product's web site on Supported data www.simrad-yachting.com or www.bandg.com. NMEA 0183 sentences 41 Preface | NAC-2/NAC-3 Commissioning Manual F-278 REV A...
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Data source selection 10 User interface 7 Drawings The relevant Declaration of conformity is available in the product's Autopilot NAC-2 Dimensions 37 section on www.simrad-yachting.com or www.bandg.com. Autotuning 19 NAC-3 dimensions 37 Controllers 7 Drive Functions 7 About this manual...
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Contents Introduction NAC-2 and NAC-3 autopilot computers Autopilot controllers Autopilot computer setup 10 Dockside setup Data source selection Boat characteristics Drive configuration Rudder setup 16 Sea trial Compass setup Transition speed Set rudder zero position Set turn rate Tuning the autopilot 23 User settings Steering profile settings Sailing parameters...
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126208 ISO Command group function 126996 Product information 37 Dimensional drawings 127237 Heading/Track control NAC-2 127245 Rudder NAC-3 127250 Vessel heading 38 Supported data 127251 Rate of turn NMEA 2000 PGNs 127257 Attitude NMEA 0183 sentences 127258 Magnetic variation NMEA 2000 PGN description 128259 Speed, Water referenced 128267 Water depth 129025 Position, Rapid update...
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Autopilot controllers 127250 128259 The NAC-2 and NAC-3 autopilot computers can be controlled by various Simrad and B&G control units. This can be dedicated 127250 autopilot controllers (e.g. AP44), Multifunction displays (MFDs) and 128259 autopilot remote controllers (e.g. OP12) used in combination with 129026 instrument systems, or any combination of the above.
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The setup of the autopilot computer is divided in three main steps: • Installation settings TX RX TX RX TX RX TX RX TX RX - Including dockside and seatrial commissioning. See "Dockside setup" on page 10 and "Sea trial" on page 16 129283 •...
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NAC-3 Installation setup workflow • MD: Main Device • RF: Rudder Feedback Dockside Sea trial • VRF: Virtual Rudder Feedback • NM: NMEA 0183 Calibrate compass Power up • CD: Control Device Select data Set rudder zero sources TX RX TX RX TX RX TX RX TX RX 59392 Set transition Con gure boat...
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Dockside setup Data source selection 129026 Before commencing with autopilot computer setup the data 129029 sources must be available and configured. 129283 Data sources selection is required on initial start-up of the system, if 129284 any part of the network has been changed or replaced, or if an alternative source is made available for a given data type and this 130306 source has not been selected automatically.
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Supported data Control method Used for setting the appropriate control ouput for your drive. NMEA 2000 PGNs The following options are available: • Solenoid NAC-2 For on/off steering of hydraulic valves. Gives fixed rudder speed. • MD: Main Device • Reversible motor •...
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Dimensional drawings different rudder speeds are required for automatic and Follow- up/Non-Follow-up steering. NAC-2 Minimum rudder Some boats may have a tendency to not respond to small rudder 204.0 mm (8.1”) 57.0 mm (2.2”) commands around the “course keeping” position because of a small rudder, whirls/disturbance of the water-stream passing the rudder, 183.0 mm (7.2”) or it is a single nozzle water jet boat.
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NAC-3 Approvals Compliance EMC directive 2014/30/EU Electrical Supply voltage 12/24 V DC +/- 10-30% Power consumption - Max 750 W Power consumption - Typical As required to drive rudder Rudder source selection, AP44 actuator. See pump/motor power ratings Ú Note: Virtual Rudder Feedback (VRF) should only be used if no Recommended fuse rating 30 A rudder feedback is available.
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Technical specifications Failure to complete test will result in an alarm. VRF calibration NAC-2 Ú Note: Only available if the rudder source is set to a virtual rudder feedback. Approvals VRF calibration determines the direction of rudder movement, the Compliance EMC directive 2014/30/EU minimum output required to move the rudder and the voltage to rudder speed ratio.
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Sea trial A seatrial can only be performed after the dockside settings are completed. Note: The seatrial must always be performed in calm conditions, in open waters and at a safe distance from other traffic! Compass setup Reset autopilot computer, AP44 To achieve the best possible performance, the compass should be calibrated, and any offsets should be compensated for.
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The active profile ('Low' or 'High') is shown in the autopilot page Settings Low Speed High Speed (e.g. AP44) and in the autopilot pop-up (MFDs): Off heading limit Track response Track approach angle Course change AP44 page MFD Autopilot pop-up confirm angle Set rudder zero position Turn Pattern settings...
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Both Autotune and manual tuning should be performed in Drives calm or moderate sea conditions. Providing you have entered correct vessel type, length and cruising Settings speed, you may not have to perform further manual or automatic tuning. Drive type Proceed as follows to verify satisfactorily steering: Drive control method Stabilize the vessel on a heading, and then select AUTO mode...
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Ú Note: DCT turn pattern is only available if the system has a valid depth input. • Turn variables: - Depth gain. This parameter determines the ratio between commanded rudder and the deviation from the selected depth contour. The higher depth gain value the more rudder is applied.
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• If the vessel has good dynamic stability, a relatively small value Spiral turn will be sufficient • An unstable vessel will require high value Makes the vessel turn in a spiral with a decreasing or increasing • The greater the vessel’s inertia, the greater value will be required radius.
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User settings The user settings can be configured differently between the different profiles, depending on boat steering characteristics and user preferences. Steering profile settings The NAC-2 and NAC-3 include two steering profiles (High and Low), used for high and low boat speed. Turn pattern settings, MFD The initial parameters are automatically assigned when you select your vessel type.
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• Actual Wind mode Maintains the rudder angle, and assumes that the current rudder angle is the trim required to maintain a steady heading. Select what wind angle the autopilot will steer towards. The following options are available: Rudder limit •...
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