GPS罗经VHFDF1.docx
《GPS罗经VHFDF1.docx》由会员分享，可在线阅读，更多相关《GPS罗经VHFDF1.docx（11页珍藏版）》请在冰豆网上搜索。
GPS罗经VHFDF1
磁罗经与陀螺罗经的使用
[3901]IfamagneticcompassisnotaffectedbyanymagneticfieldotherthantheEarth's，whichstatementisTRUE?
A.Compasserrorandvariationareequal.
B.Compassnorthwillbetruenorth.
C.Variationwillequaldeviation.
D.Therewillbenocompasserror.
[3902]Ifthecompassheadingandthemagneticheadingarethesamethen______.
A.thedeviationhasbeenoffsetbythevariation
B.thereissomethingwrongwiththecompass
C.thecompassisbeinginfluencedbynearbymetals
D.thereisnodeviationonthatheading
[3903]Ifthegyrocompasserroriseast，whatdescribestheerrorandthecorrectiontobemadetogyrocompassheadingstoobtaintrueheadings?
A.Thereadingsaretoolow（smallnumerically）andtheamountoftheerrormustbeaddedtothecompasstoobtaintrue
B.Thereadingsaretoolowandtheamountoftheerrormustbesubtractedfromthecompasstoobtaintrue
C.Thereadingsaretoohigh（largenumerically）andtheamountoftheerrormustbeaddedtothecompasstoobtaintrue
D.Thereadingsaretoohighandtheamountoftheerrormustbesubtractedfromthecompasstoobtaintrue
[3904]Ifthemagneticheadingisgreaterthanthecompassheading，thedeviationis______.
A.east
B.west
C.north
D.south
[3905]Indicationsofthemastergyrocompassaresenttoremoterepeatersbythe______.
A.follow-upsystem
B.transmitter
C.phantomelement
D.azimuthmotor
[3907]Magneticcompassdeviation______.
A.variesdependinguponthebearingused
B.istheangulardifferencebetweenmagneticnorthandcompassnorth
C.ispublishedonthecompassroseonmostnauticalcharts
D.istheangulardifferencebetweengeographicandmagneticmeridians
[3909]Magneticheadingdiffersfromcompassheadingby______.
A.compasserror
B.trueheading
C.variation
D.deviation
[3910]Magneticvariationchangeswithachangein______.
A.thevessel'sheading
B.seaconditions
C.seasons
D.thevessel'sposition
[3911]Magnetsareplacedinhorizontaltraysinthecompassbinnacletocompensateforthe______.
A.inducedmagnetisminthevessel'shorizontalsoftiron
B.changeinthemagneticfieldwhenthevesselinclinesfromvertical
C.permanentmagnetismofthevessel
D.magneticfieldscausedbyelectricalcurrentsinthevicinity
[3913]Thecompassdeviationchangesasthevesselchanges______.
A.geographicalposition
B.speed
C.heading
D.longitude
[3914]Thecompasserrorofamagneticcompassthathasnodeviationis______.
A.zero
B.equaltovariation
C.eliminatedbyadjustingthecompass
D.constantatanygeographicallocation
[3915]Thecompassheadingofavesseldiffersfromthetrueheadingby______.
A.compasserror
B.variation
C.magneticdip
D.deviation
[3916]Thedifferencebetweenmagneticheadingandcompassheadingiscalled______.
A.variation
B.deviation
C.compasserror
D.drift
[3918]Theerrorinamagneticcompasscausedbythevessel'smagnetismiscalled______.
A.variation
B.deviation
C.compasserror
D.bearingerror
[3922]Thehorizontalanglebetweenthemagneticmeridianandthenorth-southlineofthemagneticcompassis______.
A.deviation
B.variation
C.compasserror
D.dip
[3939]Variationinacompassiscausedby______.
A.worngearsinthecompasshousing
B.magnetismfromtheearth'smagneticfield
C.magnetismwithinthevessel
D.lackofoilinthecompassbearings
[3940]Variationisacompasserrorthatyou______.
A.cancorrectbyadjustingthecompasscard
B.cancorrectbyadjustingthecompensatingmagnets
C.cancorrectbychangingthevessel'sheading
D.cannotcorrect
[3941]Variationistheangularmeasurementbetween______.
A.compassnorthandmagneticnorth
B.compassnorthandtruenorth
C.magneticmeridianandthegeographicmeridian
D.yourvessel'sheadingandthemagneticmeridian
[3942]Whataretheonlymagneticcompasscorrectorsthatcorrectforbothpermanentandinducedeffectsofmagnetism?
A.Quadrantalspheres
B.Heelingmagnets
C.Athwartshipsmagnets
D.Fore-and-aftmagnets
[3943]Whatisanadvantageofthemagneticcompassaboardvessels?
A.Compasserrorisnegligibleatorneartheearth'smagneticpoles.
B.Itdoesnothavetobecheckedasoften.
C.Itisreliableduetoit'sessentialsimplicity.
D.Allpointsonthecompassrosearereadilyvisible.
14.4GPS、DF及LC的使用
[3952]Theshipisequippedwith{DF}．
A.dischargingfacilities
B.directionfinder
C.logindicator
D.akindofradar
[3953]Moreexactassessmentofvisibilitywhen______isusedtodeterminetherangeofvesselorotherobjectsinthevicinity．
A.radar
B.omega
C.satellitenavigator
D.DF．
[3954]We'llsee______thecompassesareingoodcondition．
A.if
B.how
C.when
D.where
[3955]Vesselsinportmayuse______forreceivingtyphoonwarningsduringthetyphoonseason．
A.theirtransmitters
B.theirreceivers
C.theirradars
D.theirlorans
[3956]ToobtainaccuracyinfixingbyDF，______andthreestationsshouldbeused．
A.parallelbearings
B.long-rangebearings
C.short-rangebearings
D.crossbearings
[3957]ToobtainaccuracyinfixingbyDFcrossbearings，______shouldbeused．
A.twostations，includingoneonthenearestcoast
B.twostations，includingoneonthenearercoast
C.threestations，includingoneonthefarthestcoast
D.threestations，includingoneonthenearestcoast
[3958]CalibrationStationsgivespecialtransmissionsforthecalibrationofship's______.
A.gyro-compass
B.marineradar
C.DF
D.navigationalsatellite
[3959]Beforeswitchingongyro-compass，youshouldmakesurethatthepowersupplyonboardis______.
A.highorlow
B.ACorDC
C.strongorweak
D.onoroff
[3960]Atthemastergyrocompass，thecompasscardisattachedtothe______.
A.spiderelement
B.sensitiveelement
C.linkarm
D.pickuptransformer
[3961]Acompasscardwithoutnorth-seekingcapabilitythatisusedforrelativebearingsisa（n）______.
A.bearingcircle
B.pelorus
C.bearingbar
D.alidade
[3962]______isonthepanelofDF．
A.ZEROCLEARING
B.ANTI-CLUTTER-RAIN
C.DIMMER
D.CURSOR
[3963]______isonthepanelofDF．
A.RINGSINT
B.SWEEPINT
C.REPEATER
D.GONIOMETER
[3964]Magneticcompassdeviation______.
A.variesdependinguponthebearingused
B.istheangulardifferencebetweenmagneticnorthandcompassnorth
C.ispublishedonthecompassroseonmostnauticalcharts
D.istheangulardifferencebetweengeographicandmagneticmeridians
[3965]YouhavecalibratedyourRDF.Whencompilingthecalibrationtable，thecorrectiontobeappliedtoanyfutureRDFbearingsislistedagainstthe______.
A.truebearingofthetransmitter
B.relativebearingofthetransmitter
C.headingofthevessel
D.timeofreception
[3968]______isonthepanelofDF．
A.RINGSINT
B.SWEEPINT
C.REPEATER
D.GONIOMETER
[3969]Acompasscardwithoutnorth-seekingcapabilitythatisusedforrelativebearingsisa（n）______.
A.bearingcircle
B.pelorus
C.bearingbar
D.alidade
[3973]Assumptionshall______onthebasisofscantyinformationespeciallyscantyradarinformation．
A.make
B.bemade
C.notmake
D.notbemade．
[3975]Atthemastergyrocompass，thecompasscardisattachedtothe______.
A.spiderelement
B.sensitiveelement
C.linkarm
D.pickuptransformer
[3979]Compassdeviationiscausedby______.
A.magnetismfromtheearth'smagneticfield
B.misalignmentofthecompass
C.magnetismwithinthevessel
D.adirtycompasshousing
[3980]Compasserrorisequaltothe______.
A.deviationminusvariation
B.variationpluscompasscourse
C.combinedvariationanddeviation
D.differencebetweentrueandmagneticheading
[3981]Deviationinacompassiscausedbythe______.
A.vessel'sgeographicposition
B.vessel'sheading
C.earth'smagneticfield
D.influenceofthemagneticmaterialsofthevessel
[3982]Deviationistheanglebetweenthe______.
A.truemeridianandtheaxisofthecompasscard
B.truemeridianandthemagneticmeridian
C.magneticmeridianandtheaxisofthecompasscard
D.axisofthecompasscardandthedegaussingmeridian
[3986]Errormaybeintroducedintoamagneticcompassby______.
A.makingastructuralchangetothevessel
B.ashortcircuitnearthecompass
C.beltbuckles
D.Alloftheabove
[3992]Itisdangerousforvesselswithouttheuseofradar______theestuary．
A.toget
B.toapproach
C.toproceed
D.toclose
[3993]Itmaybefoundthat，incertaincircumstances，RadarBeaconcancauseunwantedinterferenceparticularly______.
A.atcloserange
B.atendonsituation
C.atheadonsituation
D.atcrossingsituation
[3994]Magnetsinthebinnaclesofmagneticcompassesareusedtoreducetheeffectof______.
A.deviation
B.variation
C.localattraction
D.Alloftheabove
[3995]MostGPSreceiversusethedopplershiftofthecarrierphasetocompute______.
A.Latitude
B.Longitude
C.Speed
D.Time
[3996]Radarisnotonlytoobtain______，butalsotomeasuretheirdistanceawayfromyou．
A.brightnessofobjects
B.coloroftargets
C.shapeoftargets
D.bearingofobjects
[3997]Radarmakesthemostaccuratedeterminationofthe______.
A.directionofatarget
B.distancetoatarget
C.sizeofatarget
D.shapeofatarget
[3998]ThebasiccollisionavoidancedisplaypresentedbyCASIIisdesignedforeasyinterpretationand______ofpossiblecollisionthreatsituations．
A.fullconfirmation
B.preciseappreciation
C.immediateassessment
D.timelyrecognition
15.4VHF通信
升级会员 