2026全国海船船员考试船长及甲板部（航海英语9001）历年参考题库含答案详解

2026全国海船船员考试（船长及甲板部（航海英语9001)）历年参考题库含答案详解一、选择题从给出的选项中选择正确答案（共100题）1、Whatisthemeaningof"ETA"inmaritimecommunication?A.EstimatedTimeofArrivalB.EstimatedTimeofDepartureC.ElectronicTrackingAidD.EmergencyTrafficAnnouncement2、Whatdoes"VDR"standforonboardships?A.VoyageDataRecorderB.VerticalDistanceRatingC.VesselDraftReadingD.VideoDisplayRadar3、WhatisthefunctionofanECDISonamodernvessel?A.ToreplaceallradarsystemsB.TodisplayelectronicnavigationalchartsC.TocontrolengineremotelyD.Tobroadcastweatherforecasts4、WhatisthepurposeofaGMDSSaboardships?A.GeneralMaritimeDataStorageSystemB.GlobalMaritimeDistressandSafetySystemC.GeneralModeDigitalSignalSystemD.GlobalMarineDirectionFindingStation5、Inmaritimeterminology,whatdoes"LOP"mean?A.LineofPositionB.LevelofProcessingC.LengthofPassageD.LimitofPort6、Whatisthemeaningof"MMSI"inmaritimecommunications?A.MaritimeMobileServiceIdentityB.MarineMeasurementSystemIndexC.MultipleMethodSatelliteInterfaceD.MasterMaintenanceServiceInspection7、Whatdoes"SOLAS"refertoinshipping?A.SafetyofLifeatSeaB.StandardOperationsLifecycleAnalysisC.StructuralOperatingLoadAssessmentD.SystematicOceanicLogisticsAdministration8、WhatisthefunctionofaGyrocompass?A.MeasurewaterdepthB.DeterminemagneticvariationC.ProvidetruenorthreferenceD.Detectnearbyvessels9、Whatdoes"AIS"standfor?A.AutomaticIdentificationSystemB.AudioInterfaceStationC.Anti-IcingSystemD.AuxiliaryInformationScreen10、Whatisthemeaningof"COLREGs"?A.CoastalRegulationsB.CollisionRegulationsC.InternationalRegulationsforPreventingCollisionsatSeaD.ControlofRadioEquipmentGuidelines11、Whatdoes"GMDSS"requireshipstocarryfordistressalerting?A.OnlyahandheldradioB.至少一种卫星和地面无线电设备C.AsingleVHFchannelonlyD.Nospecificequipmentrequired12、Whatisthefunctionofaradarinmaritimenavigation?A.MeasuretidalheightB.DetectobjectsanddeterminerangeandbearingC.BroadcastweatherinformationD.Controlanchordepth13、Whatisthepurposeofa"Lifeboat"onavessel?A.StorecargoB.RescuepersonsfromacapsizedshipC.ProvideemergencyevacuationD.Transportdeckequipment14、Whatdoes"BERTH"meaninportoperations?A.CargoholdB.ShipparkingspaceatdockC.BridgeinstrumentD.Engineroom15、Whatisthefunctionofa"DeepSeaLeadline"?A.MeasurevesselspeedB.DeterminewaterdepthbymanualsoundingC.MeasurecurrentvelocityD.Calculatewinddirection16、Whatismeantby"freeboard"onaship?A.DistancefromwaterlinetoupperdeckB.WeightofcargoloadedC.LengthofvesselD.Breadthofvessel17、Whatdoes"METAR"reportprovide?A.MeteorologicalobservationatagiventimeB.MarineequipmenttestingreportC.MaterialengineeringrequirementsD.Maintenancerecordforvessels18、Whatisthesignificanceof"MARPOL"convention?A.RegulatecrewwagesB.PreventmarinepollutionfromshipsC.ControlshipbuildingstandardsD.Setporttariffrates19、Whatistheprimarypurposeofa"SatelliteEPIRB"?A.ProvideemergencylightingB.TransmitdistresssignalviasatelliteC.TestlifejacketbuoyancyD.Launchflaresautomatically20、Whatdoes"deadreckoning"refertoinnavigation?A.NavigationusingcelestialbodiesonlyB.EstimatingpositionbasedonpreviouslyknownpositionC.PilotingbyvisuallandmarksD.Usingsonartolocatebottom21、Whatdoestheterm"deadinthewater"meaninmaritimenavigation?A.ThevesselisanchoredB.ThevesselhasnowayonandisstationaryrelativetothewaterC.ThevesselisdriftingwithoutpowerD.Thevesselisdockedatthepier22、Whichofthefollowingsignalsindicatesthatavesselisconstrainedbyherdraught?A.OneredballintheforepartB.AcylindershapebydayandaredlightbynightC.TwoconesapextogetherbydayD.Oneblackdiamondshapebyday23、Whatisthemeaningof"stand-onvessel"underCOLREGs?A.ThevesselthatmustkeepoutofthewayB.ThevesselwhichhastherightofwayandshouldmaintaincourseandspeedC.ThevesselmaneuveringtogivewayD.Thevesselwiththenarrowestbeam24、Theabbreviation"ECDIS"standsfor:A.ElectronicChartDisplayandInformationSystemB.ElectronicControlDisplayandInformationSystemC.ElectronicChartDataandInspectionSystemD.ElectronicCommunicationandDisplayInformationSystem25、Whichtypeofradaroperatingmodedisplaysalltargetswiththeirtruemotionvectors?A.RelativemotionmodeB.TruemotionmodeC.SeamodeD.Rainmode26、Whatdoestheterm"portbroadontheportbow"indicate?A.AnothervesselisapproachingfromtheportquarterB.Anothervesselisseenat45degreestoportaheadC.AnothervesselisheadingtowardsthestarboardsideD.Anothervesselisabeamtoport27、AccordingtoSOLAS,howmanylifeboatsmustacargoshipof500GTcarry?A.AtleastonelifeboatB.AtleasttwolifeboatsC.SufficientcapacityforallpersonsonboardinoneormorelifeboatsD.Nolifeboatrequired28、Whatisthefunctionofagyrocompass?A.Tomeasurethevessel'sspeedthroughwaterB.ToindicatemagneticnorthdirectionC.TofindtruenorthdirectionregardlessofmagneticinterferenceD.Tocalculatethevessel'sposition29、Whatdoesthephrase"heaveto"meaninseamanship?A.TocastoffalllinesB.TostopthevesselandholditinpositionusingsailorengineC.TodropanchorimmediatelyD.Toturnthevessel180degrees30、Whatisthemeaningoftheinternationalsignal"G"?A.IrequireapilotB.IamdirectingmycoursetoportC.IamstoppedandmakingnowaythroughthewaterD.Heaveto31、Whatdoes"VDR"standforinmaritimeterminology?A.VoyageDataRecorderB.VerticalDistanceReferenceC.VesselDistanceReportD.VoyageDirectionRegister32、Whichchartprojectionismostcommonlyusedforcoastalnavigation?A.MercatorprojectionB.GnomonicprojectionC.PolarprojectionD.Conicprojection33、WhatisthepurposeofanEPIRB?A.TolocateothervesselsinfogB.TotransmitdistresssignalsandpositioninformationC.TocommunicatewiththecoaststationD.Tonavigateinpoorvisibility34、Whatdoes"PM"meanwhendisplayedonanARPAradar?A.PreviousMovementB.PastTrackorPositionMarkerC.PlannedManeuverD.PortMark35、WhatisthesafespeedaccordingtoCOLREGsRule6?A.AspeedallowingthevesseltostopwithinhalfthevisiblerangeB.AspeedatwhichthevesselcanmaneuvereffectivelytoavoidcollisionC.Always12knotsregardlessofconditionsD.Themaximumspeedthevesselcanachieve36、Whatisthemeaningof"MT"onanauticalchart?A.MaximumTideB.MeanTideC.MetersbelowchartdatumD.MeanTemperature37、Whatdoestheterm"berth"refertoinshippingterminology?A.AsleepingaccommodationonboardB.AdesignatedparkingspaceforavesselatadockC.AtypeofknotusedformooringD.Asafetyequipmentlocation38、Whichdeviceisusedtomeasurethedepthofwaterunderavessel?A.BarometerB.EchosounderC.AnemometerD.Gyroscope39、WhatistheprimaryfunctionofagMDSS?A.ToprovideweatherforecastsB.TomanagemaritimedistressandsafetycommunicationsC.TocontrolcargohandlingD.Tomonitorengineperformance40、Whatdoestheterm"freeboard"meaninshipconstruction?A.ThedistancefromthewaterlinetothemaindeckB.ThetotallengthofthevesselC.ThewidthofthevesselatitswidestpointD.Thedepthofthecargohold41、Whatdoestheterm"deadreckoning"refertoinnavigation?A.Thecalculationofavessel'spositionbasedonpreviouslyknownposition,course,speed,andtimeB.ThemethodofdeterminingpositionbyobservingcelestialbodiesC.ThetechniqueofusingradartofixpositionD.Theprocessofcalculatingtideheightsforharborentry42、Whatisthemeaningofthesignal"oneshortblast"whenvesselsaremeeting?A.IamalteringcoursetostarboardB.IamalteringcoursetoportC.IamoperatingasternpropulsionD.Iamstationary43、Whatdoes"ETA"standforinmaritimecommunication?A.EstimatedTimeofArrivalB.EmergencyTowageArrangementC.ElectronicTrackingAidD.EquatorialTransitAngle44、WhatistheprimarypurposeofanECDISsystem?A.DisplayelectronicnauticalchartsandassistinnavigationplanningandmonitoringB.ReceiveweatherinformationviasatelliteC.CommunicatewithportauthoritiesD.Monitorengineroomparameters45、Whatdoestheabbreviation"VDR"mean?A.VoyageDataRecorderB.VerticalDistanceReferenceC.VisualDirectionalRadarD.VesselDynamicRange46、Whatisthefunctionofagyrocompass?A.IndicatetruenorthdirectionB.MeasurevesselspeedthroughwaterC.DeterminevesseldraftD.Calculatetidalheight47、Whatisthedefinitionof"metacentricheight"?A.TheverticaldistancebetweenthecenterofgravityandthemetacenterB.ThedistancefromkeeltowaterlineC.TheangleofheelbeforecapsizingD.Theheightofthemastabovedeck48、Whatdoes"SOLAS"standfor?A.InternationalConventionfortheSafetyofLifeatSeaB.StandardOperatingProceduresforLashingandSecuringC.SystemsofLogisticsandShipOperationsServicesD.StandardOfLivingAtSea49、Whatisthemeaningof"portside"onavessel?A.Theleft-handsidewhenfacingforwardB.Theright-handsidewhenfacingforwardC.ThesternofthevesselD.Themidshipsectionofthevessel50、Whatdoes"bulkhead"meaninshipconstruction?A.AverticalwalldividingpartsofashipB.TheroofcoveringofadeckC.AtypeofanchorusedonshipsD.Adeviceformeasuringwaterdepth51、Whatisthefunctionofalifeboat?A.ToevacuatecrewandpassengersduringemergenciesB.TorecoverlostmooringlinesC.TotransportcargobetweenshipsD.Toprovideentertainmentfacilities52、Whatdoes"FIR"standforinaviationandmaritimecontext?A.FlightInformationRegionB.FixedIntervalReadingC.FirstIncidentReportD.FrontInternalRadar53、Whatisthepurposeofaradarreflector?A.TomakeasmallvesseldetectablebyradarB.TotransmitemergencyradiosignalsC.ToimproveengineefficiencyD.Tomeasurewindspeed54、Whatdoes"PSC"standforinmaritimeregulations?A.PortStateControlB.PrimaryShipClassificationC.PortableSafetyContainerD.PersonalSafetyCertificate55、Whatisthemeaningofthesignal"fiveormoreshortblasts"?A.Dangersignalordoubtaboutanothervessel'sactionsB.VesselisgoingasternC.VesselisrestrictedinmaneuverabilityD.Vesselisstopped56、Whatdoes"AIS"standfor?A.AutomaticIdentificationSystemB.AutomaticInternationalStandardC.AuxiliaryInformationSystemD.AlertandIdentificationSignal57、Whatisthedefinitionof"freeboard"?A.TheverticaldistancefromthewaterlinetotheupperdeckB.ThetotallengthofthevesselC.ThewidthofthevesselatthewidestpointD.Thedepthofthehullbelowwaterline58、Whatdoes"IMCO"refertoinmaritimehistory?A.TheformernameoftheInternationalMaritimeOrganization(IMB.TheInternationalMeteorologicalCouncilOrganizationC.TheInternationalMarineCargoOfficeD.TheInlandWaterwayManagementCommittee59、WhatisthefunctionofanEPIRB?

【options】A.TotransmitdistresssignalsforsearchandrescueoperationsB.TonavigateusingsatelliteinformationC.TomeasurevesselspeedD.Toreceiveweatherforecasts60、Whatdoes"COLREGs"standfor?A.InternationalRegulationsforPreventingCollisionsatSeaB.CommercialOperationsandLoadingRegulationsC.CoastalOceanandRiverGuidelinesD.CargoOrganizationandLightingRequirements61、Whatisthepurposeofaheelingapparatusonavessel?A.TotiltthevesselforlifeboatandrescueboatlaunchingtestsB.TostabilizethevesselinheavyweatherC.ToliftheavycargoD.Toadjusttherudderangle62、在航海英语中，"portside"指的是船舶的哪个方向？A.船首B.船尾C.左舷D.右舷63、"Deadreckoning"的中文意思是：A.计程仪测位B.推算船位C.天文定位D.雷达定位64、"Bulkcargo"指的是哪类货物？A.集装箱货B.散货C.液体货D.冷藏货65、在航海英语中，"freeboard"表示的含义是：A.船宽B.吃水C.干舷D.舱深66、"Metacentricheight"的中文名称是：A.稳心高度B.重心高度C.浮心高度D.吃水差67、"AIS"在航海领域中代表：A.自动识别系统B.全球定位系统C.雷达导航系统D.电子海图显示系统68、"GMDSS"的含义是：A.全球海上遇险与安全系统B.全球导航卫星系统C.船舶动态管理系统D.海事安全监测系统69、"PSC"在航海管理中指的是：A.港口国监督B.船旗国监督C.公司安全控制D.港口服务管理70、"Manoverboard"在航海英语中的正确含义是：A.人员落水B.人员失踪C.人员受伤D.人员晕船71、"ETD"和"ETA"分别表示：A.预计离港时间/预计抵港时间B.预计抵港时间/预计离港时间C.实际离港时间/实际抵港时间D.计划离港时间/计划抵港时间72、"Beam"在船舶尺度中表示：A.船长B.船宽C.船深D.吃水73、"Trim"在船舶状态中表示：A.稳性B.浮态C.吃水差D.纵倾74、"Cargohold"指的是船舶的：A.货舱B.锚链舱C.压载舱D.燃油舱75、"Ballastwater"的含义是：A.压载水B.舱底水C.锅炉水D.饮用水76、"Mareclausum"的中文含义是：A.公海自由B.海洋封闭C.领海宽度D.海峡通行77、"Portstatecontrolinspection"的结果可能包括：A.滞留或开列缺陷B.仅颁发证书C.罚款或拘留船员D.船舶扣押或拍卖78、"Nauticalmile"的长度约为：A.1000米B.1852米C.1609米D.2000米79、"ChartNo."在航海图中的含义是：A.海图编号B.海图比例尺C.海图版本D.海图出版机构80、"Lightlist"指的是：A.灯塔清单B.航标表C.航路指南D.潮汐表81、"Radarreflector"的主要作用是：A.接收雷达信号B.反射雷达波C.发射雷达波D.干扰雷达信号82、Whatdoestheterm"beamreach"refertoinsailing?A.SailingwiththewindcomingoverthebowB.SailingwiththewindcomingfromabeamC.SailingdirectlydownwindD.Sailingclose-hauledtowindward83、Whatisthemeaningof"stand-onvessel"inCOLREGs?A.ThevesselrequiredtogivewayB.ThevesselwhichmaintainsitscourseandspeedC.ThevesselwhichmustkeepoutofthewayD.Thevesselovertakinganothervessel84、Whatdoes"deadreckoning"refertoinnavigation?A.PositiondeterminedbycelestialobservationsB.PositionestimatedfromapreviouslyknownpositionusingcourseandspeedC.PositionfixedbyradarbearingsD.PositionobtainedfromGPSreadings85、Whatisthedefinitionof"freeboard"onaship?A.ThedepthoftheshipfromkeeltodeckB.TheverticaldistancefromthewaterlinetothedeckedgeC.ThewidthoftheshipatthewidestpointD.Thedistancefromthebottomtothewaterline86、Whatdoestheterm"berth"meaninmarineterminology?A.AtypeofanchorB.AsleepingaccommodationormooringpositionC.AnavigationalchartD.Atypeofsail87、Whatisa"knob"inmaritimenavigation?A.AtypeofnavigationalinstrumentB.Onenauticalmileperhour,equivalenttooneknotC.AsmallislandusedasalandmarkD.Adeviceformeasuringwaterdepth88、Whatdoes"portside"indicate?A.TherightsideofthevesselwhenfacingforwardB.TheleftsideofthevesselwhenfacingforwardC.ThesternofthevesselD.Thebowofthevessel89、Whatisthefunctionofagyrocompassonboard?A.TomeasurewaterdepthB.ToindicatemagneticnorthC.TofindtruenorthregardlessofmagneticfieldsD.Tomeasurevesselspeed90、Whatdoes"SOLAS"standfor?A.SafetyofLifeatSeaConventionB.SpecialOceanicLogisticsandShippingC.StateOilLogisticsandStandardsD.SeaOperationsandLifeSaving91、Whatisthepurposeofalifeboat?A.ToraceothervesselsB.ToserveasemergencyevacuationcraftC.TotransportcargoD.Toconductfishingoperations92、Whatdoes"ETA"meaninshipping?A.EarlyTimeArrivalB.EstimatedTimeofArrivalC.EmergencyTimeAlertD.EffectivedTimeofAction93、Whatisa"draftsurvey"usedfor?A.MeasuringthedepthofwaterB.CalculatingcargoweightbyreadingdraftsC.SurveyingthehullstructureD.Measuringthefreeboardmarks94、Whatdoes"bulkcarrier"referto?A.AvesselcarryingcontainerizedcargoB.AvesseldesignedtocarryunpackagedbulkcargoC.AtankvesselforliquidcargoD.Avesselcarryingvehicles95、Whatisthemeaningof"MMSI"inGMDSS?A.MaritimeMobileServiceIdentityB.MarineManagementandSafetyInformationC.MasterMarineSystemInterface

DMaritimeMeasurementandIdentification96、Whatdoes"LOP"standforincelestialnavigation?A.LineofPositionB.LevelofPressureC.LineofPortD.LevelofPerception97、WhatistheprimaryfunctionofanECDIS?A.ToreplaceallothernavigationequipmentB.TodisplayelectronicnavigationalchartsforsafenavigationC.TocontrolengineroomoperationsD.Tomeasureweatherconditions98、Whatdoes"PM"meanintideterminology?A.PrimaryMovementB.PostMeridiem,indicatingafternoontideC.Pre-MeasurementD.PowerManeuver99、Whatisa"fathom"usedtomeasure?A.DistanceinlongitudesB.Depthofwater,equaltosixfeetC.SpeedofcurrentD.Areaofachart100、Whatdoes"GMDSS"standfor?A.GlobalMaritimeDistressandSafetySystemB.GeneralMarineDataSharingSystemC.GlobalMaritimeDistributionSupportSystemD.GeneralMaritimeDisasterSignalSystem

参考答案及解析1.【参考答案】A【解析】ETA是EstimatedTimeofArrival的缩写，意为"预计到达时间"。这是航海通信中常用的缩写词，用于报告船舶预计抵达港口或目的地的时间。选项B为预计离港时间，应使用ETD表示；选项C和D均为干扰项，无此航海术语。2.【参考答案】A【解析】VDR即VoyageDataRecorder，汉语称为"船舶航行数据记录仪"，俗称"黑匣子"。其功能是记录船舶航行过程中各项关键数据，包括航速、航向、舵角、雷达图像、AIS信息等，事故调查时用于还原事发经过。选项B、C、D均为干扰项。3.【参考答案】B【解析】ECDIS即ElectronicChartDisplayandInformationSystem，电子海图显示与信息系统的核心功能是显示电子航海图ENC，辅助船舶导航定位。它可叠加雷达、AIS等数据，但不可完全替代雷达。选项A错误，选项C、D与ECDIS功能无关，属干扰项。4.【参考答案】B【解析】GMDSS为GlobalMaritimeDistressandSafetySystem，全球海上遇险与安全系统。其主要功能是通过卫星和地面无线电设备，实现海上遇险报警、搜救协调及常规通信。自1999年起强制配备。选项A、C、D为干扰项。5.【参考答案】A【解析】LOP即LineofPosition，航位线，是利用观测天体或无线电信号得到的船舶可能所处的一条位置线。多条LOP相交可确定船位。选项B、C、D均非标准航海术语，属于干扰项。6.【参考答案】A【解析】MMSI即MaritimeMobileServiceIdentity，海上移动业务识别码，是由国际电信联盟分配的九位数字编码，用于船舶自动识别系统AIS和DSC等设备识别身份。每艘船舶拥有唯一MMSI码。选项B、C、D为非标准术语，属干扰项。7.【参考答案】A【解析】SOLAS全称为SafetyofLifeatSea，即《国际海上人命安全公约》，是海上安全领域最重要的国际公约。公约对船舶结构、防火、救生、无线电通信等作出强制性规定。选项B、C、D均为虚构术语，属干扰项。8.【参考答案】C【解析】陀螺罗经（Gyrocompass）利用高速旋转陀螺的定轴性和进动性，自动寻找真北方向，为船舶提供精确的真北参考方位。与磁罗经不同，它不受地磁干扰，精度高。选项A为测深仪功能，选项B为磁差测量，选项D为雷达功能。9.【参考答案】A【解析】AIS即AutomaticIdentificationSystem，自动识别系统，通过VHF频道自动广播船舶静态、动态和航次相关信息，帮助他船和岸台识别本船身份和动态，是避碰的重要辅助手段。选项B、C、D均非该缩写含义，属干扰项。10.【参考答案】C【解析】COLREGs全称为InternationalRegulationsforPreventingCollisionsatSea，即《国际海上避碰规则》，是船舶在海上航行避让必须遵守的国际规则，包括号灯、号型、声号及避让行动等规定。选项A、B、D均为不准确表述，属干扰项。11.【参考答案】B【解析】根据GMDSS要求，船舶必须配备至少一种卫星设备和一种地面无线电设备用于发送和接收遇险警报。具体设备配置取决于船舶航行的海区（A1至A4）。仅配备单频VHF无法满足远洋海区要求，选项A、C、D均不符合公约规定。12.【参考答案】B【解析】雷达（RadioDetectionandRanging）通过发射无线电波并接收目标反射回波，探测周围物体的距离和方位，是船舶在能见度不良时避免碰撞、安全导航的重要设备。选项A、C、D分别为测深仪、通信设备和锚机功能，与雷达无关。13.【参考答案】C【解析】救生艇（Lifeboat）是船舶必备救生设备，用于在紧急情况下将船上人员撤离至安全区域，如弃船时转移至救援船只或沿岸。它具备独立生存能力，包括食物、淡水、信号器材等。选项B描述不符，选项A、D均非其用途。14.【参考答案】B【解析】Berth在港口作业中指船舶在码头停泊的位置，即泊位。船舶靠泊时需提前申请泊位，并根据船舶尺寸匹配相应长度的码头。选项A为货舱，选项C为驾驶台仪表，选项D为机舱，均与Berth含义无关。15.【参考答案】B【解析】测深锤（DeepSeaLeadline）是最早使用的测深工具，通过带有铅坠的绳索下放至海底，读取水尺刻度获得水深。虽已被回声测深仪取代，但仍是应急备用手段。选项A为计程仪功能，选项C、D与测深无关。16.【参考答案】A【解析】干舷（Freeboard）指从夏季载重水线量至_upperdeck_上缘的垂直距离，反映船舶储备浮力大小。干舷越大，抗沉性越好，但影响载货量。干舷标志刻于船体两侧，是船舶载重线的重要标识。选项B、C、D分别对应载货量、船长和船宽。17.【参考答案】A【解析】METAR是MeteorologicalAerodromeReport的缩写，即航空例行天气观测报告，在航海中也用于提供港口或沿海地区实时气象数据，包括风速、风向、能见度、云量、气温等信息。选项B、C、D均为干扰项，与METAR无关。18.【参考答案】B【解析】MARPOL全称为InternationalConventionforthePreventionofPollutionfromShips，《防止船舶污染国际公约》，是防止船舶油类、有毒液体、包装有害物质、生活污水、垃圾及空气污染的最重要国际公约。选项A、C、D均非该公约内容。19.【参考答案】B【解析】卫星应急无线电示位标（SatelliteEPIRB）在船舶遇险时自动或手动激活，通过COSPAS-SARSAT卫星系统发送含船舶识别码和位置信息的遇险报警，供救援协调中心接收并指挥搜救行动。选项A、C、D均非其功能。20.【参考答案】B【解析】推算航法（DeadReckoning）是根据已知船位，结合航向、航速和航程推算出船舶当前位置的方法。它不考虑风流压差等外部因素，误差会随时间累积，需定期用其他定位方法校正。选项A为天测定位，选项C为视觉导航，选项D为测深定位。21.【参考答案】B【解析】"Deadinthewater"指船舶相对于水体没有航速，即船对水无运动。这与锚泊或漂移不同，强调的是船相对于水的状态。选项B准确描述了这一航海术语的含义。22.【参考答案】B【解析】根据COLREGs规定，限制吃水船舶在白天显示一个圆柱体号型，夜间显示一盏环照红灯。这是对受限船舶的识别信号，其他选项分别代表不同的船舶信号含义。23.【参考答案】B【解析】"Stand-onvessel"直译为"保向保速船"，是在避碰规则中享有通行权的船舶。该船应维持原有航向和航速，让路船应采取避让行动。理解此术语对正确运用避碰规则至关重要。24.【参考答案】A【解析】ECDIS全称为ElectronicChartDisplayandInformationSystem（电子海图显示与信息系统）。它是现代化船舶导航的重要设备，能够集成海图、雷达、GPS等数据，提供全方位的航行信息。25.【参考答案】B【解析】Truemotionmode（真运动模式）下，所有目标均以其真实运动轨迹显示。雷达自身位置相对固定，海面和目标的运动均以真实速度和方向呈现，有利于判断目标动向。26.【参考答案】B【解析】"Portbroadontheportbow"指另一船位于本船左舷正横前约45度方向，即左前方。这是船舶瞭望中常用的方位描述方法，用于准确报告他船相对位置。27.【参考答案】C【解析】SOLAS公约规定，500总吨以上的货船须配备足够容纳船上全部人员的救生艇，可以是一艘或多艘。救生艇的总容量必须满足人员撤离需求。28.【参考答案】C【解析】陀螺罗经利用高速旋转陀螺的特性寻找真北方向，不受地球磁场干扰影响，是船舶航向的主要参考源。与磁罗经相比，其精度更高且不受磁性物质影响。29.【参考答案】B【解析】"Heaveto"意为漂航，是船舶在风浪中保持相对稳定位置的一种操纵方法。通过调整帆或发动机使船处于半停状态，减少纵摇和横摇，常用于等待天气好转或执行某些任务。30.【参考答案】B【解析】国际信号旗"G"的含义是"我正在转向左舷"。当悬挂在船上时，向岸上或其他船只表示此意。这是单字母信号之一，用于简单快速的通信联络。31.【参考答案】A【解析】VDR全称为VoyageDataRecorder（船舶航行数据记录仪），俗称"黑匣子"。它记录船舶航行的各项关键数据，包括航向、航速、舵令、雷达图像、语音通话等，用于事故调查和分析。32.【参考答案】A【解析】墨卡托投影海图是最常用的海岸航行海图投影方式。该投影将恒向线表示为直线，便于航向量的直接测量和航线绘制，是大洋和沿海航行的标准海图。33.【参考答案】B【解析】EPIRB（EmergencyPositionIndicatingRadioBeacon）紧急位置指示无线电信标，用于在紧急情况下自动或手动发送遇险信号和GPS位置信息。搜救机构通过接收信号定位遇险船舶或人员。34.【参考答案】B【解析】在ARPA雷达上，"PM"表示PastMark或PositionMarker，即过去位置标记。该功能用于标记船舶在特定时刻的位置，帮助追踪本船航迹或记录重要地理位置。35.【参考答案】A【解析】COLREGs第6条"安全航速"规定，安全航速应使船舶能在适合当时环境和情况的距离内停住。选项A的描述最接近规则要求，强调在可见距离的一半范围内能够停船。36.【参考答案】B【解析】在海图上，"MT"代表MeanTide（平均潮高）。这是长期观测计算得出的平均潮水位，用于潮汐计算和深度测量参考，对确定实际水深和潮汐影响非常重要。37.【参考答案】B【解析】在航运术语中，"berth"指船舶在码头的泊位，即船舶停泊指定的具体位置。该词也可指船上的床位，但在港口操作中通常指泊位。船舶靠泊时需按指定berth位置停靠。38.【参考答案】B【解析】测深仪（EchoSounder）利用声波在水中传播的原理测量水底深度。它向水底发射声波并接收回波，根据声波往返时间计算水深，是船舶航行安全的重要设备。39.【参考答案】B【解析】全球海上遇险与安全系统（gMDSS）的主要功能是管理海上遇险和安全通信。它整合了多种通信设备，确保船舶在遇险时能快速发出警报并接收相关信息。40.【参考答案】A【解析】干舷（Freeboard）指从设计水线到主甲板横梁上缘的垂直距离。干舷大小直接影响船舶的储备浮力和抗沉性，是船舶稳性和安全的重要参数，也是载重线标志的依据。41.【参考答案】A【解析】Deadreckoningisanavigationmethodthatcalculatescurrentpositionfromapreviouslyknownpositionusingcourse,speed,andtimeelapsed,withoutexternalreferences.42.【参考答案】A【解析】Oneshortblastsignalstheintentiontoaltercoursetostarboard.Twoshortblastsindicateportalteration,andthreeshortblastsindicateenginegoingastern.43.【参考答案】A【解析】ETAstandsforEstimatedTimeofArrival,commonlyusedinshippingtoindicatewhenavesselisexpectedtoreachitsdestinationorspecifiedpoint.44.【参考答案】A【解析】ECDIS(ElectronicChartDisplayandInformationSystem)displayselectronicnavigationalchartsandprovidesnavigationplanning,routemonitoring,andpositionfixingcapabilities.45.【参考答案】A【解析】VDRstandsforVoyageDataRecorder,alsoknownasaship'sblackbox,whichrecordsnavigationaldataforinvestigativepurposes.46.【参考答案】A【解析】Agyrocompassusesafast-spinningrotorandearthrotationtofindtruenorth,providingastableheadingreferenceindependentoftheEarth'smagneticfield.47.【参考答案】A【解析】Metacentricheight(GM)isthedistancebetweenthecenterofgravity(G)andthemetacenter(M).Itisacrucialmeasureofaship'sinitialstability.48.【参考答案】A【解析】SOLASistheInternationalConventionfortheSafetyofLifeatSea,themostimportantinternationaltreatyconcerningsafetyofmerchantships.49.【参考答案】A【解析】Portsidereferstotheleft-handsideofavesselwhenlookingtowardthebow.Thisisafundamentalnauticaldirectionalterm.50.【参考答案】A【解析】Abulkheadisaverticalstructuralwallthatdividestheinteriorofashipintoseparatecompartments,providingstrengthandwatertightsubdivision.51.【参考答案】A【解析】Alifeboatisarescuecraftdesignedtocarrycrewandpassengersawayfromadisabledorsinkingvesselduringemergencies.52.【参考答案】A【解析】FIRstandsforFlightInformationRegion,anairspaceofdefineddimensionswithinwhichflightinformationserviceandalertingserviceareprovided.53.【参考答案】A【解析】Aradarreflectorisapassivedevicethatreturnsradarsignalsstrongly,makingsmallvesselsvisibleonradarscreens,especiallyimportantforsafetyatsea.54.【参考答案】A【解析】PSCstandsforPortStateControl,inspectionsofforeignshipsbyportstoverifythatconditionsintheshipconformtointernationalregulations.55.【参考答案】A【解析】Fiveormoreshortandrapidblastsindicatedangerordoubtaboutanothervessel'sintentions,requiringimmediateactiontoavoidcollision.56.【参考答案】A【解析】AISistheAutomaticIdentificationSystem,atrackingsystemusedonshipstoautomaticallyexchangevesselidentification,position,andotherinformationwithothervesselsandshorestations.57.【参考答案】A【解析】Freeboardistheverticaldistancefromthewaterlinetotheupperdeckedge,animportantmeasurementrelatedtovesselsafetyandloading.58.【参考答案】A【解析】IMCOwastheoriginalnameadoptedbythe1948ConventionforwhatlaterbecameknownastheInternationalMaritimeOrganization(IMO).59.【参考答案】A【解析】AnEPIRB(EmergencyPositionIndicatingRadioBeacon)transmitsadistresssignalon406MHztosatellitesystemsforsearchandrescuecoordinationwhenactivated.60.【参考答案】A【解析】COLREGsreferstotheInternationalRegulationsforPreventingCollisionsatSea,asetofrulesgoverningvesselbehaviortopreventcollisions.61.【参考答案】A【解析】Aheelingapparatusisusedduringlifeboatdrillstotiltthevessel,simulatingemergencyconditionsforlaunchinglifeboatsandconductingsafetyexercises.62.【参考答案】C【解析】"portside"是航海英语常用术语，意为"左舷"，即船舶面向船首时的左侧。与之相对的是"starboardside"（右舷）。这两个术语是航海英语中最基础的方向词汇，船员必须熟练掌握，用于日常导航、避碰和通信。63.【参考答案】B【解析】"Deadreckoning"译为"推算船位"，是航海定位的基本方法之一。该方法根据已知船位、航向、航速和时间推算出新的船位，不考虑风流压差的影响。在天文或电子导航设备故障时，推算船位是重要的备用定位手段。64.【参考答案】B【解析】"Bulkcargo"意为"散货"，指无包装直接装入船舱的货物，如煤炭、铁矿石、粮食等。散货船是专门运输此类货物的船舶类型。散货装卸效率高但需注意货物移动和液化风险，是航海英语中的重要货运术语。65.【参考答案】C【解析】"Freeboard"译为"干舷"，指从水线到甲板边缘的垂直距离。干舷是衡量船舶储备浮力的重要指标，干舷越大，船舶抗沉性和稳性越好。干舷与船舶载重线标志密切相关，直接影响船舶装载安全。66.【参考答案】A【解析】"Metacentricheight"译为"稳心高度"，用字母GM表示，是衡量船舶初稳性的关键参数。GM值为正时表示船舶具有正稳性，能够恢复正浮状态；GM值过大则会导致船舶横摇周期过短，影响舒适性和安全性。67.【参考答案】A【解析】"AIS"全称为AutomaticIdentificationSystem，译为"自动识别系统"，是一种船舶自动识别设备。该系统可自动广播本船船名、呼号、位置、航向、航速等信息，帮助船舶间相互识别，对防止碰撞和海上救援具有重要意义。68.【参考答案】A【解析】"GMDSS"全称为GlobalMaritimeDistressandSafetySystem，译为"全球海上遇险与安全系统"。该系统是国际海事组织强制推行的海上通信系统，用于船舶遇险时的报警、协调和搜救通信，保障海上人命安全。69.【参考答案】A【解析】"PSC"全称为PortStateControl，译为"港口国监督"，是指船舶到达外国港口时，港口国当局对该船的安全技术状况、防污染设备及船上人员配备等进行的监督检查。PSC检查不合格的船舶可能被滞留，直接影响船舶运营。70.【参考答案】A【解析】"Manoverboard"译为"人员落水"，是船舶紧急情况的常用术语。当船上人员不慎落入海中时，应第一时间发出"Manoverboard"警报，并采取相应救援措施，如抛投救生圈、执行威廉森回旋等rescuemaneuver。71.【参考答案】A【解析】"ETD"为EstimatedTimeofDeparture，意为"预计离港时间"；"ETA"为EstimatedTimeofArrival，意为"预计抵港时间"。这两个缩写在航运通信中使用频繁，用于告知相关方船舶的动态安排，是航海英语的基本词汇。72.【参考答案】B【解析】"Beam"译为"船宽"，指船舶最宽处的水平距离。船宽是影响船舶稳性、阻力和甲板面积的重要因素。此外，"Breadth"也可表示船宽，但在航海英语中"Beam"更为常用，特别是在描述船舶操纵性能时。73.【参考答案】C【解析】"Trim"译为"吃水差"，指船舶首吃水与尾吃水之差。当船首吃水大于船尾吃水时称为"trimbythehead"（首倾），反之称为"trimbythestern"（尾倾）。适当的尾倾有利于船舶航行性能，是配载作业的重要控制参数。74.【参考答案】A【解析】"Cargohold"译为"货舱"，是船舶用于装载货物的空间。货舱的大小和数量取决于船舶类型，散货船通常设有多个货舱，油轮则设有多个货油舱。货舱结构设计需满足货物装卸效率和船舶强度的要求。75.【参考答案】A【解析】"Ballastwater"译为"压载水"，是注入压载舱以调整船舶吃水、稳性