副航海英语习题讲解

2017航海英语复习三Keyword10:RadarandARPA（60）A335.Radarmakesitpossibleandmuchsaferforustosail__.【知识点】雷达的使用【分析】主要作用：雾航B380.Radarmakesthemostaccuratedeterminationofthe__.target【知识点】雷达的使用【分析】雷达测距最正确。有关题目awarethat__whenusingit.A.ItsrangereadingismoreaccuratethanitsbearingreadingB.Alow-lyingcoastlinewithalong,flatbeachwillshowupproperlyontheradar.C.Radarisonlyaimedatcollisionavoidance.D.theuseofradarisnecessaryonlywhenvisibilityisrestricted、D527.Radarisnotonlytoobtain______,butalsotomeasuretheirdistanceawayfromyou.D361.WhichstatementconcerningtheoperationofradarinfogisTUREA.radarrangesarelessaccurateinfogB.navigationbuoyswillalwaysshowuponradarC.asandybeachwillshowupcleareronradarthanarockycliffD.smallwoodenboatsmaynotshowuponradarB327.Thecorrectmethodofswitchingoffamarineradaristoturnpowerswitchfirst,thento______position.A.off/standbyB.standby/offC.standby/closeD.

to____positionclose/standby【知识点】雷达的使用【分析】雷达关机步骤。B606、Astheradarantennascansthrough____arotation,itcanbeshowwherethetargetisrelativetoyourposition.C.180degree

D.90degree【知识点】雷达的使用【分析】雷达天线。A345.Theradarcontrolthatreducesweakechoesouttoalimiteddistancefromtheshipisthe__A.sensitivitytimecontrol(sea-cluttercontrol)B.receivergaincontrol

(differentiator

)【知识点】雷达的使用（控钮）【分析】近距离的杂波有关题目D346.TheradarcontrolthatshortensallechoesonthedisplayandreducescluttercausedA.sensitivitytimecontrol(seacluttercontrol)

B.receivergaincontrolC.brilliancecontrol(differentiator)D372.______isonthepanelofradar.INVERTERA391.WhatisthepurposeofVRMcontrolA.TomeasuredistanceaccuratelyC.Tomeasurerangeandbearing

B.TomeasurebearingaccuratelyD.Toadjustradarmonitor

D.fast

time

constant【知识点】雷达的使用【分析】活动距标圈。D557.SWEEPINTonradarpanelistheabbreviationof______．A．sweepintroductionB．sweepinterestC．sweepintention

D

．sweepintensity【知识点】雷达的使用【分析】扫描亮度A605、WhenwillyouhavetoadjustgainA.everytimeyouchangerangesB.eachwatch

C.everyday

D.everyweek【知识点】雷达的使用【分析】增益：每次改变量程后需从头调整。D352.Whenhitting

asolid

object

suchasaship

oranairplane,

the

radar

wavesare

reflectedback______theycame.A.intheway

B.theway

C.bytheway

D.throughthepath【知识点】雷达的工作原理【分析】雷达波路径B360.WhichgeneralstatementconcerningradarisFALSEA.raisingtheantennaheightincreasestheradarrangeD.radarshouldbecheckedregularlyduringclearweathertoensurethatitisoperatingproperly【知识点】雷达的工作原理【分析】雷达探测物标的能力会遇到天气的影响。A348.TheradiowavesusedforradarareveryshortA．afewcentimetersB．afewfathoms

C

，only______long．afewmetersD

．．afewfeet【知识点】雷达技术指标（波长）【分析】航海雷达主假如3cm和10cmC336.The10-cmradarascomparedtoa3-cmradarofsimilarspecificationswill______.A.bemoresuitableforriverandharbornavigationD.havemoreseareturnduringroughseaconditions【知识点】雷达技术指标（波长）【分析】1）最大作用距离：正常天气下，3cm雷达的大；雨雪天，10cm雷达的大。2）距离分辨力和测距精度：波长短，脉冲前沿短，脉冲宽度短——3cm好。3）方向分辨力和测方向精度：波长越短，波束宽度越窄——3cm好。4）抗杂波能力：10cm好。有关题目D337.The3-cmradarascomparedtoa10-cmradarwithsimilarspecificationswill______.A.givebetterrangeperformanceinrain,hail,etc.B.displaysmalltargetsinamassofdenseseaclutteratagreaterrangeC.havelessseareturninchoppyroughseasD.displayamoremaplikepresentationforinshorenavigationA364.Coralatolls,orachainofislandsatrightanglestotheradarbeam,mayshowasalonglineratherthanasindividualtargetsdueto______.C.thepulselengthoftheradarD.themultiple-targetresolutionfactor【知识点】雷达技术指标（天线波束宽度）【分析】天线水平波束宽度对方向分辨力的影响。A237.Youareusingradarinwhichyourownshipisshownatthecenter,andtheheadingflash0produced.light【知识点】雷达显示方式【分析】首向上显示方式B331.YouhavebeenobservingyourradarscreenandnoticethatacontactonthescreenhasA.ThecontactisdeadinthewaterB.Thecontactisonthesamecourseandspeedasyourvessel【知识点】雷达显示方式【分析】相对运动有关题目C374.Aradarcontactwillremainstationaryonarelativemotionradardisplayonlywhenitis____.A.onthesamecourseasyourvesselB.atthesamespeedasyourvesselC.onthesamecourseandspeedasyourvesselD.onareciprocalcourseatthesamespeedasyourvesselD363.Youareunderwayat5knotsandseeonyourradaracontact10milesdirectlyasternofyou.12minuteslatter,thecontactis8milesdirectlyasternofyou.Whatistheestimatedspeedofthecontact

D.15knots【知识点】雷达显示方式【分析】相对运动：d=(V2-V1)tC353.Whenusingaradarinaunstabilizedmode,fixesaredeterminedmosteasilyfrom______.【知识点】雷达显示方式【分析】不稳固显示方式——首向上，航向变，方向变。B375.AradardisplayinwhichNorthisalwaysatthetopofthescreenisa(n)______.【知识点】雷达显示方式【分析】北向上——稳固显示方式。有关题目C376.Aradardisplaywhichisoriented,

（标定方向）

sothatnorthisalwaysatthetopofthescreen,iscalleda(n)__C392.Whatcourseshouldbefedintoastabilizedradarpicture【知识点】雷达显示方式【分析】稳固显示方式：使用航向为真航向。A.EchoesfromabuoyB.Ownship'smarker【知识点】真运动【分析】真运动模式A339.Whenthesystemdeterminesthatacollisionsituationexists,thetargetcausingthealarmconditionareidentifiedon{PPI}byabrightTadjacentthereto.A.planpositionindicatorB.planepositionindicator【知识点】雷达显示【分析】平面地点显示器有关题目B377.

Aradarrangetoasmall,chartedinwhichformC.Parabola

objectsuchasalightD.Hyperbola

will

provide

aline

of

position【知识点】雷达测距【分析】距离地点线C330.Anavigatorfixingavessel’spositionbyradar______.A.shouldneveruseradarbearingsD.mustuseinformationfromtargetsforwardofbeam【知识点】雷达定位【分析】雷达定位方法。有关题目B342.Thecommonwaytoobtainyourship’spositionis______.A.keepingaclosewatchandlookoutB.takingaradarrangeandbearingC.observingaradartargetandlisteningtosignalsD.keepingawellclearcautionC356.Whenusingtheradarfornavigating____.A.Thebestfixisobtainedbyusingatangentbearingandarange.B.Andusingtworadarrangesforafix,theobjectsoftherangesshouldbeclosedtoreciprocalbearings.C.Andusingranges,themostrapidlychangingrangeshouldbemeasuredlast.D.Andcrossingaradarrangeofoneobjectwiththevisualbearingofasecondobject,thetwoobjectsshouldbe80°to110°apart.【知识点】雷达定位【分析】测距定位时，距离变化快的后测。A341.Inradarplottingistheabbreviationof______.C.crossingpointtoapproachD.fogorsteadyrain【知识点】雷达标绘【分析】CPAC340.Theclosestpointofapproach(CPA)ofacontactonarelativemotionradarmaybedetermined____.A.immediatelywhenthecontactisnotedonradarB.onlyiftheradarscopeiswatchedconstantlyC.afterthecontacthasbeenmarkedatleasttwiceD.byanoccasionalglanceattheradar【知识点】雷达标绘【分析】CPA的标绘方法：固定的时间间隔确立两个以上地点，连线即得相对运动线。有关题目A394.Howdoescurrentanddrifteffecttherelativemotion,relativevectorpresentationA.NoeffectB.ProducingsmallerrorsincalculatedaspectC.ProducinglargeerrorsincalculatedaspectD.ProduceerrorsincalculatedCPA/TCPAB395.DoescurrentanddrifteffecttheCPA/TCPAcalculationsonatruemotiondisplayD.Yes,veryseriouslyB381.Anindirectradarechoiscausedbyareflectionofthemainlobeoftheradarbeamofftheobserver’svessel.WhichofthefollowingisnotacharacteristicofindirectechoesA.Theirbearingisalmostconstant,evenwhenthetruebearingofthecontactchangesappreciablyD.Whenplotted,theirmovementsareusuallyabnormal【知识点】假回波【分析】间接反射假回波：雷达波经烟囱、大桅等间接反射到目标，目标回波经原路线回到天线形成。特色：在暗影区内，一般方向不变。A549.Youhaveanothershipovertakingyoucloseaboardtostarboard.bearing090°relativeatrangesofmile，1mile，andmiles.echoesarecalled____.

Youhave3radartargetsInthiscase，theunwanted【知识点】假回波【分析】多次反射假回波：等间距，强度渐渐减弱。A359.Whichconditionindicatesthatyourradarneedsmaintenance【知识点】雷达故障【分析】固定距标圈体现锯齿状时，雷达需要维修。B543.Radarbeaconsaretransmittersdesignedtoproducea__onthescreensofship’sradarsets.【知识点】雷达信标【分析】雷达信标在雷达屏幕上产生独到的图像。D236.YouareapproachingalightfittedwithaRACON.Thelightmaybeidentifiedontheradarby___.C.acircleappearingonthescopesurroundingthelightD.acodedsignalappearingonthesamebearingatagreaterrangethanthelight【知识点】雷达信标【分析】雷达信标在雷达上的图像。有关题目appearonthePPIdisplayA.startingwithadashandextendingrapidlyoutwardfromthetargetB.asabrokenlinefromcenterofPPItothetargetC.startingwithadotandextendingrapidlyinwardfromthetargetD.startingwithadashandextendingtotherightofthetargetA332.Itmaybefoundthat,incertaincircumstances,interferenceparticularly______.A.atcloserangeendonsituationC.atheadonsituationsituation

RaderBeaconD.atcrossing

can

cause

unwanted【知识点】雷达信标【分析】近距离可能致使扰乱杂波。有关题目A554.Itmaybefoundthat,incertaincircumstances,RaderBeaconemissionscancause____withthenormalradardisplay,particularlyatcloserange.D384.WhatdoesaRaconhelpwithC387.WhatisacodedraconA.AraconwhichautomaticallyactivateitselfB.AracononlyworkingatnightC.AraconwhichdisplayamorsecodeontheradarscreenD.AfutureraconexpectedtobeoperationalafterY2000A385.HowisanuncodedRacondisplayedonthePPIA386.WhattypeofradarcanactivateaRaconD540.Inordertoinsurethattheraconsignalisvisibleonyour3cmradar,the______.A.10cmradarshouldbeplacedonstandbyorturnedoffB.gaincontrolshouldbeturnedtomaximumC.radarshouldbestabilized,headupD.raincluttercontrolshouldbeoffbut,ifnecessary,maybeonlowB344.Thefittingofanefficientradarreflectorislikelytoconsiderablyincreasetheship’s【知识点】ARPA报警【分析】追踪的目标的参数小于预设的【知识点】雷达反射器【分析】提升被探测到的可能性。有关题目D388.WhatisthepurposeoftheradarreflectorA.MakingobjectslessvisibleB.MakingechoesweakerontheradarB393.WhatisthecorrectspeedinputtoanARPAusedfortrafficsurveillance【知识点】ARPA工作原理【分析】交通看管用的ARPA应输入对水速度。D338.TheARPAmayswaptargetswhenautomaticallytrackingiftwotargets______C.aretrackedonthesamebearingD.passclosetogether【知识点】ARPA自动追踪存在的问题【分析】自动追踪时，假如两个目标相邻太近，ARPA可能会发生目标调动（误追踪）两个或两个以上目标落入同一个波门而惹起追踪错误的现象

。B350.WhatisTRUEofthehistorydisplayofatarget’spastpositionsonaARPAA.Itprovidesagraphicdisplaytoemphasizewhichvesselisonacollisioncourse.B.Inthetruepresentation,itprovidesaquickvisualchecktodetermineifavesselhaschangedcourse.C.Thedisplayisoneoftheprimaryinputsandmustbeinusewhenusingthetrialmaneuvercapability.D.Itprovidesagraphicdisplayofatargetvessel’srelativecourse,speed,andCPA.【知识点】ARPA的尾迹【分析】尾迹主假如能迅速发现来船的能否存在灵活。C351.WhatwillcausetheARPAtoemitavisualalarm,audiblealarm,orbothA.AnacquiredtargetenteringintoaguardzoneB.AtrackedtargetlostforoneradarscanC.AtrackedtargetenteringyourpresetCPA-TCPAlimitsD.AtargetbeinginitiallydetectedwithinaguardzoneCPA-TCPA时会发生报警。B354.WhenusinganARPA,whatshouldyouconsiderinordertoevaluate（评估，评论）theinformationdisplayedA.Thetargetvessel’sgeneratedcourseandspeedarebasedsolelyonradarinputs.B.Navigationalconstraints（限制，拘束）target.DYoucannotdetermineifasmalltargethasbeenlostduetoseareturn.【知识点】ARPA的使用【分析】航海的限制要求可能要求目标船改向。B358.WhichARPAdatashouldyouuseinordertodetermineifaclosequarterssituationwill

B.RelativetrackinformationD.Initialrangeofacquisition【知识点】ARPA的使用【分析】判断能否会形成紧急场面的

ARPA参数是相对运动线的信息。A538.YourARPAhasbeentrackingatargetandhasgeneratedthetargetscourseandspeed．Theradardidnotreceiveatargetechoonitslasttwoscansduetotheweather．WhatshouldyouexpectunderthesecircumstancesA．TheARPAwillgeneratedataasifthetargetwasstillbeingtrackedbyradarB．TheARPAwillgiveanaudibleand/orvisuallosttargetalarmC．TheARPAwillgeneratedatabasedonseareturnechoesfromthevicinitywherethetargetwaslostD．TheARPAhaslostallmemoryofthetargetandmustrecomputethetargetdata【知识点】ARPA的使用【分析】连续三次未扫描到会发生目标丢掉。D544.YourARPAhasautomaticspeedinputsfromthelog.Duetocurrents,thelogisindicatingafasterspeedthanthespeedovertheground.WhatshouldyouexpectunderthesecircumstancesA.ThegeneratedCPAwillbelessthantheactualCPA.B.ThegeneratedTCPAwillbelaterthantheactualTCPA.【知识点】ARPA的使用【分析】ARPA的输入速度错误，将会致使目标船的矢量计算错误。Keyword11:GPS（9）C493.TheGPSsatelliteorbitstheearthinapproximately______.hourshourshourshours【知识点】GPS卫星【分析】轨道运转周期约12小时正确的时间为下边：C618、Theorbitalperiodisone-halfasiderealday,____.D494.RegardingtheuseofGPS,whichoneofthefollowingsisincorrectA.GPSisthemostaccurateglobalsystemtoday’scontrolC.DGPSismoreaccuratethanGPSD.GPScanprovideareal-timepositionunderanycondition【知识点】GPS【分析】real-timeposition及时船位C485.WhichstatementaboutsatellitenavigationisTRUEA.Whileafixcanbegeneratedbysignalsreceivedfromtwosatellites,threesatellitesarenecessaryforreliableaccuracy.（三星二维定位、四星三维定位）B.Thesatellitesareinequatorialorbitsaroundtheearthabout60°oflongitudeapart（均匀散布于6个轨道，轨道的升交点赤经各相差60度）C.ThesatellitenavigationsystemdeterminesafixbymeasuringtheDopplershiftoftheradiosignalsfromthesatelliteD.Theship’sreceivercannotbeginprocessingdatauntiltheantennalocksontothesatelliteandstartscontinuoustracking【知识点】GPS【分析】对于GPS的描绘正确的选项是：采纳丈量卫星的无线电信号多普勒频移来定位。C499.If______isshutdownforanextendedtime,optimumpositionfixingwilltakeupto2hoursafterpowerisreapplied.A.radar

B.DF

C.SatelliteNavigator

D.AutomaticOmegaNavigator【知识点】GPS冷启动【分析】GPS长时间关机，从头开机后最正确立位时间在2小时后。

.【知识点】GPS【分析】多半GPS接收机使用载波相位的多普勒频移技术来计算速度。C569.WhichstatementconcerningGPSisTRUEA.Itcannotbeusedinallpartsoftheworld.B.Thereare12functioningGPSsatellitesatpresent.C.Itmaybesuspendedwithoutwarning.D.Twopositionlinesareusedtogivea2Dfix.【知识点】GPS的使用【分析】GPS能够随时中断供应服务。A497.WhatisthemainpurposeofDGPS

B.Decreasepositioningaccuracydon’tknow【知识点】DGPS【分析】DGPS的主要作用是提升定位精度。相同题目B620、Atechniquereferredtoas____allowsuserstoobtainmaximumaccuracyfromtheGPSsystem.A.AISB.DGPS

C.ARPA

D.RBSKeyword12:AISandVDR（13）A503、automaticallyprovidestheship’【知识点】AIS的作用【分析】AIS自动地供应给船舶驾驶员在VHF有效距离内的船舶或其余目标的重要信息。、相同题目A520.TheAIStransponderisdesignedtotransmitinformation.allA504.The______transmitsownshipdatacyclicallyviatwodefinedVHFchannelsandreceivesthesamedataoftheothershipsandobjectsthatareequippedwithAISsystems.【知识点】AIS的作用【分析】AIS经过两个预设的VHF频道循环地发送本船信息，而且接收装有AIS的其余船舶和目标的相同的信息。C.AISisnotasaccurateasARPAD.AISisnotallowedtobeusedforcollisionavoidance【知识点】AIS的使用【分析】AIS用于避碰时需要记着：AIS不可以以画面的方式显示邻近交通状况。C518.IncaseofAISoverload,whatcanyouexpect“freeze”【知识点】AIS的容量【分析】假如AIS信息容量过载，则自动过滤远距离目标。有关题目muchcantheAISbroadcastmodebeoverloadedwithoutanysignificantoperationaleffect%~100%%~300%%~500%D.nooverloadisacceptedC519.WhichofthefollowingisdefinedasstaticinformationD.Routeplan【知识点】AIS静态信息【分析】静态信息包含：IMO编号，船名与呼号，船长与宽度，船型，定位天线在船上的地点。MMSI：MaritimeMobileServiceIdentity海事挪动业务辨别码A564.Automaticidentificationsystem(AIS)areexpectedtobroadcastallofthefollowinginformationexcept.【知识点】AIS供应的信息【分析】不可以供应始发港。相同题目C565.Automaticidentificationsystems(AIS)areexpectedtobroadcastallofthefollowinginformationEXCEPT______.A:navigationstatusB:ship’sheadingC:portoforiginD:timestampB500.Estimatedtimeofarrivalatdestinationofvesselcanbebroadcastby____B502.MMSInumberofvesselisbroadcastevery6