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Tuning parameters, MFDs

Tuning parameters, AP48

Rudder gain

This parameter determines the ratio between commanded rudder
and the heading error. The higher rudder gain value the more
rudder is applied. If the value is too small it will take a long time to
compensate for a heading error, and the autopilot will fail to keep a
steady course. If the value is set too high the overshoot will increase
and the steering will be unstable.

20

Sea trial

| NAC™ -D Commissioning manual

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Содержание NAC-D

Страница 1: ...ENGLISH NAC D Commissioning Manual www simrad yachting com ...

Страница 2: ......

Страница 3: ...ing AS and its subsidiaries branches and affiliates reserve the right to make changes to specifications without notice Governing language This statement any instruction manuals user guides and other information relating to the product Documentation may be translated to or has been translated from another language Translation In the event of any conflict between any Translation of the Documentation...

Страница 4: ...t 2020 Navico Holding AS Warranty The warranty card is supplied as a separate document In case of any queries refer to the brand website of your unit or system www simrad yachting com 4 Preface NAC D Commissioning manual ...

Страница 5: ...t Australia and New Zealand Navico declare under our sole responsibility that the product conforms with the requirements of level 2 devices of the Radiocommunications Electromagnetic Compatibility standard 2017 Trademarks Reg U S Pat Tm Off and common law marks Visit www navico com intellectual property to review the global trademark rights and accreditations for Navico Holding AS and other entiti...

Страница 6: ...s follows Ú Note Used to draw the reader s attention to a comment or some important information Warning Used when it is necessary to warn personnel that they should proceed carefully to prevent risk of injury and or damage to equipment personnel Translated manuals Available translated versions of this manual can be found on the following website www simrad yachting com 6 Preface NAC D Commissionin...

Страница 7: ...ion 15 Rudder setup 16 Sea trial 16 Compass setup 17 Transition speed 18 Set turn rate 18 Tuning the autopilot 23 User settings 23 Steering profile settings 24 Turn pattern settings 28 Installation verification 28 Checklist 28 Boat specific settings 31 Maintenance 31 Preventive maintenance 31 Checking the connectors 31 Software update 31 Resetting the autopilot computer Contents NAC D Commissionin...

Страница 8: ...8 Contents NAC D Commissioning manual ...

Страница 9: ...splay 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 AP48 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 f...

Страница 10: ...autopilot remote controller or it can be a separate standby key Warning When the autopilot is delivered from factory and any time after an autopilot reset has been performed the installation settings are all reset to factory preset default values A notification will be displayed and a complete setup has to be made Failure to do so correctly may prohibit the autopilot from functioning properly 10 I...

Страница 11: ...Installation setup workflow Introduction NAC D Commissioning manual 11 ...

Страница 12: ...tion Override function The SteadySteer feature allows you to control how the autopilot system reacts to manual steering When enabled Manual steering overrides the active mode If Auto mode or NoDrift mode was active before going into manual steering they will automatically re engage when the vessel has stabilized on a new course If NAV mode was active before going into manual steering a dialog will...

Страница 13: ...well as available autopilot features The following options are available Displacement Planing Boat length Used by the autopilot system to calculate steering parameters Cruising speed Used if no speed info is available It is used by the autopilot system to calculate steering parameters Dockside setup NAC D Commissioning manual 13 ...

Страница 14: ...of a small rudder whirls disturbance of the water stream passing the rudder or it is a single nozzle water jet boat By increasing the Minimum rudder parameter you may improve the course keeping performance on some boats However this will increase the rudder activity Ú Note Only set a value for minimum rudder if it proves to give a better course keeping performance in calm sea It should be set afte...

Страница 15: ...Rudder setup Selecting rudder source Ruddersourceselection MFDs Ruddersourceselection AP48 Dockside setup NAC D Commissioning manual 15 ...

Страница 16: ...mpass setup To achieve the best possible performance the compass should be calibrated and any offsets should be compensated for The setup needs to be done from an appropriate display unit Depending on the unit access to the compass setup is available from the compass s device dialog or from a dedicated Calibration option in the unit s Settings menu Devicedialog MFDs 3 16 Sea trial NAC D Commission...

Страница 17: ...ndency to exhibit different steering characteristics at different speeds You may also have different preferences about the steering performance of your boat required at low and high speeds It is recommended that you set a value that represents the speed where the boat s steering characteristics change For instance the planing threshold recommended or at the speed you want the autopilot to change b...

Страница 18: ...r low and high speed profiles Both Autotune and manual tuning should be performed in calm or moderate sea conditions Providing you have entered correct vessel type length and cruising speed you may not have to perform further manual or automatic tuning Proceed as follows to verify satisfactorily steering 1 Stabilize the vessel on a heading and then select AUTO mode 2 Observe course keeping and rud...

Страница 19: ...to AUTO mode and take control of the vessel Ú Note Autotuning can be stopped at any time by pressing the STBY key on the autopilot controller The autotuning takes approximately 3 minutes to complete When completed the autopilot automatically switches to Standby mode and the rudder must be controlled manually Ú Note All parameters that are set during autotuning can be manually adjusted For optimal ...

Страница 20: ...ng error The higher rudder gain value the more rudder is applied If the value is too small it will take a long time to compensate for a heading error and the autopilot will fail to keep a steady course If the value is set too high the overshoot will increase and the steering will be unstable 20 Sea trial NAC D Commissioning manual ...

Страница 21: ...ssel s characteristics inertia hull shape and rudder efficiency If the vessel has good dynamic stability a relatively small value will be sufficient An unstable vessel will require high value The greater the vessel s inertia the greater value will be required Increasing counter rudder value may result in some higher rudder activity also when steering a straight course particularly in high waves Th...

Страница 22: ...anges 10 20 degrees and proceed with bigger changes 60 90 degrees Adjust Counter rudder value to obtain best possible response as in illustration C Ú Note As many boats turns differently to port versus starboard due to propeller rotation direction do the course changes in both directions You may end up with a compromise setting of Counter rudder that gives a little overshoot to one side and a bit ...

Страница 23: ...ter rudder see Ruddergain on page 20 and Counterrudder on page 21 Turn rate Used for manually setting the turn rate used when the heading change is larger than 5 Autotrim Controls how fast the autopilot will apply rudder to compensate for a constant heading offset e g when external forces such as wind or current affects the heading Lower autotrim will give faster elimination of a constant heading ...

Страница 24: ...eg Track approach angle This setting is a limit to prevent approaching the track too steeply Approaching the track at shallower angles is permitted depending on the cross track distance XTD and track response setting This setting is used both when you start navigating and whenever the autopilot is working the boat towards the route Course change confirm angle Defines the limit for automatic course...

Страница 25: ...urn or during the turn Turnpatternsettings MFD Turnpatternsettings AP48 Ú Note Not all autopilot controllers include turn pattern steering Refer to your autopilot controller for more information C turn Continuous turn Steers the vessel in a circle Turn variable Rate of turn Increasing the value makes the vessel turn a smaller circle User settings NAC D Commissioning manual 25 ...

Страница 26: ...cle Negative values indicate decreasing radius while positive values indicate increasing radius Zigzag turn Steers the vessel in a zigzag pattern Turn variables Course change A Leg distance B B A Square turn Makes the vessel automatically turn 90 after having travelled a defined leg distance Turn variable Leg distance S turn Makes the vessel yaw around the main heading Turn variables Course change...

Страница 27: ...h If the value is set too high the overshoot will increase and the steering will be unstable CCA The CCA is an angle that is added to or subtracted from the set course With this parameter you can make the boat yaw around the reference depth with s movements The larger the CCA the bigger yawing will be allowed If the CCA is set to zero there is no S ing Ref depth This is the reference depth for the...

Страница 28: ...ured according to instructions Installation instructions for the units Network powered and terminated according to instructions Wiring instructions for the units Sources selected Autopilot control unit documentation Vessel configured Boatcharacteristics on page 13 Drive units configured and calibrated Driveconfiguration on page 14 Compass calibrated Compasssetup on page 16 Seatrial completed manua...

Страница 29: ...er gain Counter rudder Autotrim Init rudder Rudder limit Off heading limit Track response Track approach angle Course change confirm angle Turn Pattern settings Settings Continuous Rate of turn Spiral Initial radius Change turn Zigzag Course change Installation verification NAC D Commissioning manual 29 ...

Страница 30: ...Settings Leg distance Square Leg distance Lazy S Course change Turn radius Depth contour Depth gain CCA 30 Installation verification NAC D Commissioning manual ...

Страница 31: ... plugs are equipped with a lock ensure that it is in the correct position Software update You can update the software for the autopilot computer from a display unit connected to the network You can check the autopilot computer s software version from the display unit s Device list The latest software is available for download from the product website on www simrad yachting com Resetting the autopi...

Страница 32: ...ter is started after reset it will run through the automatic setup procedure Ú Note Unless you need to clear all values set during the installation set up procedure you should not perform a reset of the autopilot computer 32 Maintenance NAC D Commissioning manual ...

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