1102第二节雷达及ARPA的使用

第二节雷达及ARPA的使用1156.__A____isnotajoboftheradarantenna．下列哪一项不是雷达天线的功用（）A．Toreceivethehigh-frequencypulsesfromthetransmitter接收发射器发来的高频脉冲B．Tofocusthepulsesintoabeam，andsendthemintospace把脉冲集中成束，并发射出去C．Topickupreflectedpulsescomingfromobjectsthathavebeenstruckbythebeam接收从物标反射回来的脉冲波束D．Toreflectmicrowaves反射微波1157.____D__isnotusedinmodernradar．下列哪一项不用于现代雷达A．EBL电子方位线B．VRM活动距标圈C．CRT荧光屏D．Greasepencil蜡笔1158.___D___typicallyextendsfromcloseas0.1nauticalmilesoutto32NM．（）可最近可达0.1海里,最远可达32海里A．EBL电子方位线B．VRM活动距标圈C．CRT荧光屏D．targettrackingrange物标跟踪范围1159.AlthoughmanualplottingforCPAworkswell，theworkloadcanbecomeoverwhelmingwhenconfrontedwith__D____．虽然使用人工标绘也可以准确求出最近会遇距离，但是，当遇到（）时，工作量将变得非常大。A．onetargetB．twotargetsC．threetargetsD．alargenumberoftargets大量的物标时1160.I___C___shorebasedradarassistance．我（）岸基雷达帮助A．Ask问B．Lookfor寻找C．Require需要D．Inneedof缺少1162.Myradarisnotworking．Irequireshorebasedradarassistance．Isshorebasedradarassistance_____B___?[834]我船雷达故障，我需要岸基雷达帮助，是否有岸基雷达（）A．used已使用的B．available可以使用C．inuse正在用D．canbeused能被使用1163.PPIis____A__．PPI是指什么A．aplan-positionindicatorsystem平面位置显示器B．pulse-planintegrationC．pulse-pulseinputD．power-planinput1164.Radarmakesitpossibleandmuchsaferforustosail___A___．在（）情况下，雷达使我们的航行更加安全A．Indensefog浓雾中B．Inboisterousweather恶劣天气C．Intheopensea在大海上D．Inrivers在河道中1165.Radarreflectorsarerequiredfor____D__．[923]下列什么船需要安装雷达反射器A．allfishingvesselsover39feetinlength所有长度大于39英尺的渔船B．sail-propelledfishingvessels机帆并用的渔船C．allfishingvesselsoflessthan200GT所有小于200总吨的渔船D．woodenhullfishingvesselswithapoorradarecho雷达回波反射性差的木质渔船1166.SWEEPINT（扫描线亮度）onradarpanelistheabbreviationof__D____．雷达面板上，“SWEEPINT”是下列哪一个词组的缩写（）A．sweepintroduction引入、介绍B．sweepinterest兴趣C．sweepintention意图D．sweepintensity强度、亮度1167.The__A____hasabuilt-inworldmap;mostareasaredisplayedonascaleof4000nmfromthetoptothebottomofthescreen，andcanbezoomedinto150nm．下列哪一种设备有内置的世界地图，在屏幕上，从上到下最大可显示范围是4000海里，也可放大到显示范围为150海里A．chartplotterB．C-MAPNT一种海图类型C．C-CardsD．PPIAChartplotterisadeviceusedinmarinenavigationthatintegratesGPSdatawithanelectronicnavigationalchart(ENC).ThechartplotterdisplaystheENCalongwiththeposition,headingandspeedoftheship,andmaydisplayadditionalinformationfromradar,automaticinformationsystems(AIS)orothersensors.Asappropriatetoparticularmarineapplications,chartplottersmayalsodisplaydatafromothersensors,suchasecholocators/sonar.1168.The10-cmradarascomparedtoa3-cmradarofsimilarspecificationswill__C____．[955]如果其他各种参数都一样，与3厘米波雷达相比，10厘米波雷达有什么特点（）A．Bemoresuitableforriverandharbornavigation更适合在河道及港内使用B．Providebetterrangeperformanceonlowlyingtargetsduringgoodweatherandcalmseas在天气好，海面平静的情况下，对远距离的低平物标更容易发现C．Haveawiderhorizontalbeamwidth波束宽度更宽D．Havemoreseareturnduringroughseaconditions在天气恶劣情况下，有更多的海浪回波1169.Thearticulatedlightissuperiortoothertypesofbuoysbecause__D____．发光清晰的灯标优于其他种类的浮标，这是因为（）A．Theradarreflectorsreflectbettersignals雷达反射器的回波更好B．Foghornsignalstravelfarthertosea雾号在海上传播的距离更远C．Itisequippedwithstrobelights这种灯标配有闪光灯D．Ithasareducedwatchcircle这种灯标的观测周期较小1170.Theclosestpointofapproach（CPA）ofacontactonarelativemotionradarmaybedetermined_C_____．[999]相对运动显示模式下，在什么情况下，可以判断出CPA（）A．Immediatelywhenthecontactisnotedonradar在雷达上一看到物标回波，立即可以B．Onlyiftheradarscopeiswatchedconstantly只有一直观察雷达才可以C．Afterthecontacthasbeenmarkedatleasttwice至少回波出现两次以后才可以D．Byanoccasionalglanceattheradar偶尔看一眼雷达就可以1171.Thecorrectmethodofswitchingoffamarineradaristoturnpowerswitchto______positionfirst，thento____B__position．[1008]关闭航海雷达的正确方法是，先把电源开关旋钮旋到（）再旋到（）A．Off/standbyB．Standby/offC．Standby/closeD．Close/standby1172.Thedevelopmentof__B____ledtothefullyautomaticARPAsystemsinstalledoncommercialships．由于（）技术的发展，最终使商船可以安装全自动的“ARPA自动标绘雷达”系统A．SeaTalkB．powerfulmicroprocessorsandmegamemorycapacity功能强大的微机处理器及容量巨大的存储器C．chartplotter海图标绘器D．small-scalechart小比例海图1173.Theradarcontrolthatreducesweakechoesouttoalimiteddistancefromtheshipisthe___A___．[1158]减少一定距离内的微小回波显示的控钮是（）A．sensitivitytimecontrol（sea-cluttercontrol）海浪干扰抑制B．receivergaincontrol增益C．brilliancecontrol亮度D．fasttimeconstant（differentiator）微分调节1174.Theradarcontrolusedtoreduceseareturnatcloserangesisthe___B___．[1160]减少近距离内的海浪回波显示的控钮是（）A．Gaincontrol增益B．Sensitivitytimecontrol海浪干扰抑制C．Fasttimeconstant微分调节D．Pulselengthcontrol脉冲宽度1175.Theradiowavesusedforradarareveryshort，only__A____long．雷达使用的无线电波很短，只有（）长A．Afewcentimeters几厘米B．Afewfathoms几拓C．Afewmeters几米D．Afewfeet几英尺1176.TheshorelinealongRockyPointshouldgiveagoodradarreturnbecause____A__．沿“RockyPoint”的海岸线的雷达回波很清晰，这是因为（）A．Theshoreisbluffandrocky海岸是悬崖和石壁B．Ofoffshoreexposedrocks岸边的石头C．Submergedreefscauseprominentbreakers被淹没的暗礁形成了明显的开花浪D．Thelookouttowerismarkedwithradarreflectors了望塔上安装了雷达反射器1178.WhatisTRUEwhenoperatinginfogandothervesselsaredetectedbyradar__B______．在雾中，当有他船被雷达探测到时，下列哪一句话是正确的（）A．Youshouldmakeanamplechangetoportforavesselcrossingonthestarboardbow你应大角度向左转向，因为有一条船正横越你船右船首B．Youshouldmaneuverinampletimeifaclose-quarterssituationisdeveloping如果正在形成紧迫局面，你应及早采取行动C．Youshoulddeterminethecourseandspeedofallradarcontactsatsixminuteintervals你应每6分钟判断一次所有回波的航向及航速（）D．Long-rangescanningwillprovideearlywarningofALLothervesselswithi