Simrad SIMRAD HS50 manual Reduced heading indication, Simulated data

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Simrad HS50 Heading Sensor

Reduced heading indication

The reason for reduced heading performance could be one of the following:

The number of GPS satellites the Sensor unit is able to see is too few. Press the NAV2/POS button until the Skyplot view appears. Check that at least four satellites are available and that the PDOP value is less than 6. Refer Satellite Skyplot display, page 37.

Check also the number of common satellites seen by the two GPS antennas by pressing the INFO button and looking at the value for Common sat. in the advanced heading information display as shown in page 38. The number of common satellites have to be two or higher to determine a heading.

If one of the criteria's above not is fulfilled, it may be an obstruction between the Sensor unit and the GPS satellites. Consider moving the vessel to another location to see whether that helps.

If it is still reduced after checking the above items, consult your nearest Simrad dealer for assistance.

Simulated data

If the HS50 system is not sending out real data, check whether the system is operation in demonstration mode with only simulated output data. If the system operates in demonstration mode the text DEMO appear at the bottom of the status field as shown in the figure.

Refer Expert setup, page 30.

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20221081 / F

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Contents Simrad HS50 Heading Sensor Copyright 20221081 / F Document revisions Contents Operating Instructions Figures and Drawings This page Intentially Left Blank Introduction HS50 System components20221081 / F Definitions About this manualDefinitions, abbreviations and acronyms Abbreviations and acronyms NmeaRestrictions in use Health, environment and safetyRestrictions in guarantee Physical dimensions Performance dataSensor unit Display unitProcessing unit PowerEnvironmental specification Processing unit to sensor unit cable CableInterface Grounding GeneralCable connection Sensor unit Location of the unitMechanical installation Bracket mounting option Cable wiring Pedestal mounting optionWaterproofing the connectors Display unitPanel mounting Alternative panel mountingBracket mounting option Display unit cable Processing unit Cable connections Display Unit Sensor Unit AP9MK3 Autopilot Connecting to Simrad equipmentRGC Signal Interface unit IS15 Instruments J50/J300X Junction unitNI300X RGC12 Gyro Compass Simrad RA40/RA50 RadarSoftware setup procedure Display Adjustments ExampleDifferential corrections Data output All six serial lines may be used simultaneouslyEthernet GeneralHeight aiding Velocity filteringRadar format DatumExpert setup HDT-QRun mode Heading offsetExample Operating Instructions OverviewTurning the system ON/OFF Performance monitoring348 Navigation/HDT display Navigation/POS displayInfo displays Hdop PdopGps hdt Deviation Accuracy Last heading Common sat Alarms Invalid Position and Heading alarm Invalid Position alarmInvalid Heading alarm Operation Height aided GPS positionThis page Intentially Left Blank Maintenance Periodic maintenanceSoftware upgrades Re-calibration of the Sensor unitTroubleshooting Repairs and modificationsReplacing damaged cables Replacing damaged unitsNo response No valid dataNo Differential corrections Invalid HeadingReduced heading indication Simulated dataFigures and Drawings Dimensions SeatexSensor unit bracket, dimensions Kongsberg SeatexSensor unit Processing unit, dimensions Display unit, dimensions Documentation Standard deliveryOptional equipment