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Chapter 1: Overview 1-9
Heading and Position
Data
Heading and Position
Data
Heading and Position Data
Fullfunctionality of theradar/chartplotter is achievedwhenit ispart of an
integrated system withotherequipment (inaddition to another
hsb
2
unit)
connectedviaSeaTalkor NMEA0183.Data from thisequipmentincluding
positionandheadingis shown on thedisplayand is usedin calculations.
Detailsonconnectingotherequipmentaregivenin Chapter 8.
Providing Heading Data for Radar/Chart Overlay and MARPA
TheperformanceofMARPA andRadar/ChartOverlayis dependentonthe
qualityofyourheadingsensor.Itisimportantthatboththeheadingsensorand
theradarscanner(bearingalignment)arecorrectly calibrated.Refertothe
appropriate headingsensorand radarscannerhandbooksfor calibration
details. Thebettertheaccuracyofyourheadingdata,thebetterthe
performance of MARPAandRadar/ChartOverlay.
Agyrocompassprovidesthebestperformanceinallconditions.Alternatively
youcould use a fluxgatecompass withrategyro stabilization.
MARPA requiresheadingdata to be frequentlyupdated(werecommenda
dataoutputrateofgreaterthan8Hz);headingdatamustthereforebeprovided
to the display on NMEA.
Inmultiple-display systems,heading must be connected,via NMEA, to each
displaythat will be used for MARPA.
Werecommend thePathfinderSmartHeadingSystem(which includesthe
Gyro Plus 2 unit). Good results are also obtained with a Raymarine autopilot
systemincorporatinga150Gor 400G CourseComputer withinternalrate
gyro.
Otherheadingsensorsconnectedon NMEAmay provide satisfactory results
inreasonableseastates.However,inunsettled conditionsarategyrocompass
isadvisable.
ContactRaymarineCustomerServicesor your authorizedRaymarine dealer
foradditionalinformation.For specificconfigurationdetailswith the
RaymarinecoursecomputerrefertoAppendix E.If you areusing a suitable
third party heading sensor,refer to its documentation for installation and
calibration details.
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