1丙类航海英语机考大三副通用600题库

丙类英语机考题库大三副通用第一章航海根本学问Roll-on\roll-offshipsareequippedwithAcargoelevators BconveyorbeltsCramps DderricksandwinchesforcargohandlingPermissionisrequestedtopumpoutabout200tonsofcleanseaballastwaterforpurposes.Asafemanning BtrimmingCavoidingcollision DpreventingpollutionWhochecksthebridgeclockforaccuracyeachday？A ThirdofficerBSecondofficerC ChiefofficerDAssistantofficerVesselmustbe dulyqualifiedofficersandcrew.A.suppliedwithequippedbymannedwithfittedwithThemaninchargeofashipis Heisresponsiblefortheship,hercargoandthesafetyofthecrew.Chiefofficer B.SecondOfficer C.ThirdOfficer D.Master-istheheadofthedeckdepartment.A.TheChiefOfficerTheSecondOfficerTheThirdOfficerTheMastertheThirdofficer’sdutyhvesseliscommandedunderthepilotorAoperatethewheelandstandby BkeepalookoutandoperatesteeringgearCentertelegraphordersinthebellbookDoperatethetelegraphandentertelegraphordersinthebellbook当船舶由引航员或船长指挥时，三副的职责是什么。whomustensurethattheemergencylightingandpowersystemsoncargovesselsareoperated leastweekly?Amaster BchiefengineerCdeckofficerassigned Dengineeringofficerassigned谁至少每周确保货船上的应急照明和电源系统正常？9portofregistryreferstotheportwhereAtheshiphasbeennamed BtheshiphasbuiltCtheshiphasbeensigned Dtheshiphasbeenregistered10theportinwhichcreworpassengersgoonboardtheshipiscalledAportofcall BportofembarkationCportofdestination Dportofdisembarkation11thepresentvoyageofmyshipbeganattheportofshanghaiafterloading8000tonsofcargoonboardandendedafterdischargingthecargoattheportofHongKong,whichistheportofdestinationthenextportofcalltheportofarrivalthelastportofcallThesecondofficerwilltake thewatchsoon.A.onB.atC.offD.over themorning,from0800to1200,thirdofficerisonduty.A.onB.atC.inD.duringYouaregettingtoooldforseaman.You”dbetter ajobashoreinstead.A.takeintakefortakeuptakeover15.Icanhardlyunderstand yousaid.A.whatB.whichC.thatD.whoBHPstandsfortheofthemainengine.A.breathdimensionB.builder”snameC.brakehorsepowerD.revolutionspeerminuteWhocancontacttheDesignatedPerson?A.ThedesignatedThecaptainAllsenorofficerAllofficersandcrewMerchantvesselscanoperateintherebasicways,but isnotoneofthem.A.liners 班轮voyagecharter 航租timecharter 期租generalcarrier杂货船船以三种根本方式运营，但是以下哪一个不是。D其次章 船舶构造和设备Theforemostpartoftheupperdeckiscalledthe A.forecastleB.tweendeckC.hatchesD.peaktanksA首楼The istheintermediatedeckbetweenupperdeckandtheinsidebottomofthevessel.A.forecastleB.tweendeckC.hatchesD.peaktanks什么是在上甲板和船舶内底间的中间甲板。B二层甲板Accesstoaholdcanbeobtainedthough A.forecastleB.tweendeckC.hatchesD.peaktanks进入货舱可通过什么获得。C货舱Theforemostandaftermostspacesofthevesselarethe A.forecastleB.tweendeckC.hatchesD.peaktanks船舶的最前和最终的空间是什么。D 尖舱Forecastledeckislocatedintheship”s A.bowstemB.stemC.portsideD.starboardside首楼甲板位于船舶的哪里。A首柱 providesstrengthandstoragespacefor fuel,lubricatingoil,freshwater,salt(ballast)waterandpotablewater.ThedoublebottomThecofferdamThenavigatingbridgeThesuperstructure什么为燃油，润滑油，淡水，海水〔压载水〕和饮用水供给构造强度和贮存空间A双层底Longitudinalandtransverseseparationsbetweenthetanks,whichareusedtopreventliquidsfromleakingfromonedoublebottomtankintotheother,arecalled .doublebottomsB.cofferdamsC.navigatingbridgeD.superstructure液货舱间纵向和横向的分隔空间，用作防止液体从一个双层底舱漏到另一个，这个空间叫什么。B 隔离空舱 containsthewheelhousewiththecontrolstation,thechartroomwherecharts,pilotbooksandpublicationsarekept,andtheradioroom.ThedoublebottomThecofferdamThenavigatingbridgeThesuperstructure哪里包含有掌握站的操舵室，保存海图，航路指南和出版物的海图室，和无线电室。C 台 isacasingusedforexhaustpipesfromenginesA.ThefunnelThemessroomThegalleyThesatelliteantenna什么是一个金属管子为了从主机的排气管。A烟囱10. ishousedinaplasticdomeforweatherprotection.A.ThefunnelThemessroomThegalleyThesatelliteantenna什么被放在塑料圆顶中防风雨D卫星天线11. iswheredeliciousfoodiscooked.A.ThefunnelThemessroomThegalleyThesatelliteantenna在哪里烹饪美味的食物。C厨房iswherethecreweattheirmealsA．ThefunnelB.ThemessroomC.ThegalleyD.satelliteantenna在那里船员吃饭。B餐厅isusedtomoortheshiptotheseabedtokeepitstationary.AThebulbousbowBThe-anchorCThebowthrusterDThepropeller什么用来系泊船舶到海底，保持它静止。B锚isaround-shapedunderwaterpartinthefrontoftheship.thepurposeistocreatelessfrictionwithwatersothattheshipmoveseasily.AThebulbousbow BThe-anchorCThebowthruster DThepropellerA球鼻首isplacedinthefrontoftheshipunderthewater.whicheasesberthingormaneuveringsidewaysatslowspeed.ThebulbousbowTheanchorThebowthrusterThepropeller什么位于水下船舶前端，便利靠泊或慢速侧向操纵。C船首侧推器MastsandderricksofcargoshipsaremadeofAsteel Bcopper Cbrass Dzinc货船的桅杆和吊杆是什么做的。A钢Whichreferstothelivingspaceforseafarers?Apoop Bstoreroom Caccommodation Dsaloon什么指的是海员的生活区？C居住区MypropellerwashitbyasteelbargelyingA.ahead B.astern C.alongsidemtportbow D.alongsidemystarboardbow我船的螺旋桨被位于哪里的钢驳船撞了。B 尾部Rightatthetopis( )Itis300mmlongand25mmwidewithitsupperedgeinlinewiththeuppermostcontinuouswatertightdeck.A.thedeckline B.Plimsoildise C.Plimsollline D.summerloadline在顶部的是什么，它是300毫米长25毫米宽，上边缘与最上面的露天甲板平行。A甲板线Verticallybelowthedecklineisacirclewhoseoutsidediameteris300mm.Itiscalledthe( )A.thedeckline B.Plimsolldisc C.Plimsollline D.summerloadline300毫米，这个圈叫什么。B载重线圈21.Ahorizontalline450mmlongnd25mmwidecutsthroughtheloadlinedisc.ItiscalledtheA.thedeckline B.Plimsolldisc C.Plimsollline D.summerloadline45025毫米的水平线通过载重圈，这条线叫什么。C载重线22．Whenashipisintropicalzoneandinseawaterofdensity1025,shemustnotloadtomorethantheupperedgeofthelinemarkedA.S B.T C.W D.F23.Whenashipisinsummerzoneandinseawaterofdensity1025,shemustnotloadtomorethantheupperedgeofthelinemarkedA.S B.T C.W D.F24.whenashipisinwinterzoneandinseawaterofdensity1025,shemustnotloadtomorethantheupperedgeofthelinemarkedA.S B.T C.W D.F25.whenthedensityofwateris1000,i.e.infreshwaterandinsummerzone,ashipmayloaduptotheupperedgeofthelinemarkedA.S B.T C.W D.F当水的密度是1000，也就是淡水和夏季区，船舶可能装货到标有什么的线的上边缘。D 水载重线26.( )lengthoftheshipmeasuredfromextremepointsoftheshipforwardandaft.lengthoverall B.afterperpendicular C.amidships D.extremebreadth什么是从船最前端量到最末端测量的船舶的长度。A总长27.()isapointmidwaybetweentheforwardandtheafterperpendiacular.A.lengthoverallafterperpendicularC.amidshipsD.extremebreadth什么是首垂线和尾垂线的中间点。C船中28.()measuredatthemidshipsectionandtakenfromoutsideoftheship’ssideshellpialingononesidetotheoutsideofship’sideshellplatingontheothersideA.lengthoverall B.afterperpendicular C.amidships D.extremebreathD最大宽度29.measuredatthemidshipsectionandtakenfrominsidetheship’sshellononesidetoinsidetheship’ssideshellplatingontheothersideA.lengthoverall B.afterperpendicular D.extremebreath E.moldedbreadth什么在船中部测量，从船一舷的船壳板的内部量到另一舷船壳板的内部。E型宽30.istskenfromthelowermostpointofthekeeltothesummerloadlineA.extremedraft B.moldeddraft C.extremedepth D.moldeddepth什么是从龙骨的最低点量到夏季载重线。A 最大吃水31.〔〕ismeasuredfromthebaselinetothesummerloadlineatthemidshipsectionA.extremedraftB.moldeddraftC.extremedepthD.moldeddepth什么是在中部，从船底基线量到夏季载重线。B型吃水32.depthofthevesselatship’ssidefromtheupperdecktothelowestpointofthekeel.A.extremedraft B.moldeddraft C.extremedepth D.moldeddepth什么是在船侧的深度，从上甲板量到龙骨最低点。C最大深度33.frombaselinetotopoftheupperdeckattheship’ssideamidshipsA.extremedraft B.moldeddraft C.extremedepth D.moldeddepth什么是在船侧中部，从船底基线量到上甲板。D型深34.Theshiphasanoveralllength160metersA.on B.by C.of D.at船舶有160米的总长 C35.Iherebydeclarethatmyvessalhasa15400metrictonsA.balecapacity B.graincapacity C.cargocapacity D.DWTC我在此宣布我船有什么15400公吨。D载重吨位36.Theshiphasofmorethan10metresanfullloadA.anengine B.anoveralllength C.adispacement D.adraft10米。D吃水37.isthedraftofyourshipatfullload?A.howmanyB.howmuchC.howhighD.what满载时你船的吃水是多少？D38.Therearesomenavigationalinstrumentsthebrige.A.in B.on C.at D.of有一些航行仪器在驾驶台。B39.Theshipislocatedonmyradar.A.found B.lookeffor C.entered D.reported船舶在雷达上找到了。A40.isanequipmentusedtodetectedthepresenceofships,buoys,coastandmanyothertargetsandtoobtainrangeandbeatingofthesetargets.A.thematinesextant B.thechronometer C.theechosounder D.theradarD雷达41.RadarmakesitpossibleandmuchsaferforustosailA.indensefog B.inboisterouswerther C.intheopensea D.inrivers雷达使我们在哪里航行变得可能并更安全。A 在浓雾中42.isusedformeasuringhorizontalandverticalangles.A.themarinesextantB.thechronometerC.themagneticcompassD.thegyrocompass什么用作测量水平和垂直角度。A航海六分仪43.isthenavigationaltimekeeperofthevessal.A.themarinesextantB.thechronometerC.themagneticcompassD.thegyrocompass什么是船舶的航用钟表。B天文钟44.isaradioreceiverwithabilitytosensedirectionoftheincomingradiowaves.A.theechosounderB.theradarC.thecourserecorderD.thedirectionfinder什么是无线电接收机，能检测到无线电波来的方向。D无线电测向仪45.providesapapertraceofcoursesteeredbythevessalagainsttime.A.theechosounderB.theradarC.thecourserecorderD.thedirectionfinder什么供给纸制的船舶航行的航向轨迹。C航向记录仪46.sendsaradiosignalfromthebottomoftheshiptothesea-bed,fromwhichitisreflected.A.themarinesextantB.thechronometerC.theechosounderD.theradar什么发送无线电信号从船底到海底，再从海底反射。C回声测深仪47.Allecho-sounderscanmeasuretheA.actualdepthofwaterB.actualdepthofwaterbelowkeel C.averagedepthfromwaterlinetohardbottomD.averagedepthofwatertosoftbottom全部回声测深仪能测量什么。B龙骨下的实际水深48.Whatmayaffecttheaccuracyofsoundingwithechosounder?A.seabottom B.ship’sspeed C.speedofcurrent D.watertemperatureanddensity什么可能影响测深仪的测深准确度？D水的温度和密度49.ADopplerloginthebottomreturnmodeindicatestheA.velocityofthecurrent B.bottomcharacteristicsC.depthofthewater D.speedovertheground多普勒计程仪在海底反射模式〔确定示速工况〕显示的是什么。D对地的速度Ship’ssteeringgearreferstoA.cargohandingmachinesB.deckwinchesandderricksC.engine-roomtools D.coursecontrollingsystem船舶舵机指的是什么。D航向掌握系统Whensteeringbyautopilot,howoftenshouldmanualsteeringbechecked?A.everydayB.whentimeallowsC.atleastonceawatchD.nocheckingisnecessary当用自动舵驾驶时，多久检查一次人工操舵？C至少一班一次52.isusedforcallingandreplying,andtransmittingacknowledgingandrelayingdistressalertsA.NAVETEXreceiver B.searchandrescuetransponderC.emergencypositionindicatingradiobeacon D.digitalselectingcalling什么是用作呼叫，应答，并发送确认和转发遇险警报。D数字选择性呼叫53.isusedforprovidinghomingsignalsfromsurvivalcraftfordetectionby9GHzradar.A.NAVETEXreceiver B.searchandrescuetransponderC.emergencypositionindicatingradiobeacon D.digitalselectingcalling9千兆赫的雷达探测到。B搜救雷达应答器54.isusedforreceivingmaritimesafetyinformationwhichisautomaticallyprintedbythereceiver.A.NAVETEXreceiver B.searchandrescuetransponderC.emergencypositionindicatingradiobeacon D.digitalselectingcalling什么用作接收海上安全信息并由接收机自动打印。A航行电传接收机55.maybeusedship-to-shipforSARoperations.A.channel6B.channel13C.channel16D.channel70什么频道用作船对船的搜救行动。A6频道56.isusedfordistressandurgencytraffic,andmaybeusedbyaircraftforsafetypurpose.A.channel6 B.channel13 C.channel16 D.channel70什么频道用作遇险和紧急通信，并可被飞机用于安全用途。C16频道57.isusedforsafetyofnavigationalship-to-ship.A.channel6 B.channel13 C.channel16 D.channel70什么频道用作船对船的航行安全。B13频道58.ThemostcommontypeofdavitfoundonmerchantvesselstodayistheA.radial B.sheath-screw C.gravity 如今在商船上最普遍的吊艇柱是哪一种。C重力式59.TheportableradioapparatusmeansA.theradioapparfittedontheportsideB.theradiowithaportableequipmentC.theradioequipmentwhichiseasilymovableD.theportableradiowithsomeapparatus手提无线电设备指的是什么。C 简洁移动的无线电设备HowmanylifebuoyshasyourshipbeenexactlyA.producedby B.metwith C.offeredof D.providedwith船舶已经被配备多少个救生圈？DEachlifebuoyshallbemarkedinblockcapitalsoftheRomanalphabetwithoftheship.A.thecallsignandename B.theofficialnumberandnameC.theportofregistryandnameD.theportofregistryandofficialnumber每个救生圈应用大写罗马字母标出船舶的什么。C登记港和船名62.Isitsafearocket?A.toshootB.tofireC.toletgoD.tosendtosky火箭安全吗？BTheEPIRBonacargovessalmustbestowed()A.inaninsidepassagewayB.inanapprovedbracketC.sothatisitaccessiblefrombridgeofthevessalD.sothatitwillfloatfreeifthevesselsinks在货船上应急无线电示位标必需安放在哪里。D假设船舶漂浮，它将自由漂移Theline-throwingapplianceprovidedonboardshipisA.forthesavingoflifeB.forfire-fightingC.formooringpurposeD.fortowingpurpose 上的抛绳器是什么。A为了挽救生命65.Iamfireandhavedangerouscargoonboard.A.on B.in C.at D.with 我船着火，有危急货在船上。A66.,asthechemicalestinguisheragent,shouldbeusedforanelectricfire.A.drychemicalorfoam B.foamorsodaacidC.carbondioxideorfoam D.carbondioxideordrychemical什么，作为化学灭火剂，应用于灭电子火 D二氧化碳或干粉ThemajoruseofwaterinfightingfiresistoA.suffocatethefireB.absorbtheoxygensupportingthefireC.actasacoolingagentD.washthefireaway 用水灭火的主要用途是什么。C作为冷却剂Fireisundercontrol,andA.lifeboatisnolongerneededB.lifeboatisneededbadlyC.lifeboatisneedednotmoreD.lifeboatisurgentlyneeded 火势得到掌握。A不再需要救生艇ThecollisionbulkheadislocatedA.onthebridgedeck B.betweenthepassengerandcargoareasC.atthesternoftheshipD.onthefirstwatertightbulkheadahead防撞舱壁位于哪里。D在第一个水密舱壁的前面70.isthemostvisiblesignalofdistressfromalifeboatatseainthedaytimeA.Smokesignal B.flashsignal C.firesignal D.radioemergencytransmission什么是白天海上来自救生艇的最明显的遇险信号。A烟雾信号71.Thefire-protectedlifeboatsarefoundA.insatisfactorilycondition B.satisfactorily C.satisfactory D.satisfactored防火的救生艇被觉察令人满足。C第三章海上通信whereshouldtheGMDSSradiologbekeptonboardship?( )IntheCaptain’soffice B.Intheseacabin C.AttheGMDSSoperatingpositionD.Anywhereonboardthevessal GMDSS〔全球海上遇险与安全系统〕无线电日志保存在船上哪里。C在GMDSS操作位置上TheterrestrialsystemofGMDSSconsistsofradio-telephony,DSC,DirectPrintingTelegraphy,NavtexandSARTB.INMARSAT,DSC,DirectPringtingTelegraphy,NavtexandSARTC.radio-telephony,DSC,EPIRB,NavtexandSARTD.StatusRecordingsystem,DSC,DirectPrintingTelegraphy,NavtexandSARTGMDSS的地面系统包括哪些。A无线，数字选择性呼叫，窄带文字电报，航行电传和搜救雷达应答器ThesatellitesystemofGMDSScomprisesA.NAVTER,COSPAS/SARSAT,EPIRBsandStatusRecording-systemB.Inmarsat,COSPAS/SARSAT,EPIRBsandStatusRecording-systemC.NAVTER,Inmarsat,EPIRBsandDSCD.Inmarsat,DirectPrintingTelegraphy,andDSCGMDSSBWhatisthemostimportantthingyoushoulddobeforetransmittingonamarineradio?Askforpermission B.Recordthetimein yourradiolog C.Pressthepushtotalkbuttonthreetimes D.Monitorthechanneltoensurethatitisclear在用海上无线电发送前你应做的最重要的事是什么？D监测频道确保清楚 _withinradiotelephone-coverageofatleastoneVHF-coststation,continuousalertingchannels70andradiotelephnyservicesareavailable.SeaAreaA1 B.SeaAreaA2 C.SeaAreaA3 D.SeaAreaA4哪个海区至少被一个甚高频岸站掩盖，不断发出警报的70频道和无线效劳可用 A A1海区 withinradiotelephone-coverageofatleastoneMF-coaststation,continuousalerting2187.5kHzandradiotelephonyservicesareavailable.SeaAreaA1 B.SeaAreaA2 C.SeaAreaA3 D.SeaAreaA4哪个海区至少被一个中频岸站掩盖，不断发出警报的2187.5千赫和无线效劳可用B A2海区In withincoverageofanInmarsatgeostationarysatellite,continuousalteringisavailable.SeaAreaA1 B.SeaAreaA2 C.SeaAreaA3 D.SeaAreaA4哪个海区被国际海事卫星组织的同步卫星掩盖，可获得不断的报警CA3海区Pleasestand-by channel12.A.to B.on C.at 请值守于12频道 BTheabbreviationRYCinamarinecablegenerallystandsfor A.referringtoyourcrew B.referenceforyourcaptainC.returntoyourcabin D.receivedyourcable在海上电报中缩写RYC一般代表什么 D 接收你船的电报Intelexabbreviations,CFMandINFMreferto and respectively.A.confirm,inform B.confide,inflow C.conform,infuse 在电传缩写中，CFM和INFM分别指的是什么 A 确认，通知Doyourequireanyfurtherassistance?Myshipissafenowandnoassistanceisnecessary.ThisVHFcommunicationgenerallytakesplaceduring A.salvageoperation B.cargodischarging C.bunkering D.towingoperationA救助作业ALLVHFmarinebandradiosoperateinthesimplexmode,whichmeansthat.A.onlyonepersonmaytalkatatimeB.onlytwopersonsmaytalkatthesametimeC.theradioonlytransmits D.theradioonlyreceives全部甚高频无线电在单工模式下工作，这意味着什么 A一个时间只有一个人可以讲话WhichofthefollowingstatementsistrueaboutVHF?A.TheVHFisusedtobridgeshortdistances.B.WishVHF,listeningandspeakingcanbedonesimultaneouslyC.Whenyouwishtospeak,youreleasethebuttonD.Whenyouwishtolisten,youpushthebutton.关于甚高频以下哪一个表述是正确的？A甚高频被用于短距离Youmust inthisareaunlessyouhavemessagesaboutthecasualty.A.keepradiosilenceB.keepradiosilentC.keepradiobesilentD.keepsilenttheradio 伤亡方面的信息，否则你必需在这一区域怎样B保持无线电静默WhenthechangingofaVHFchannel/frequencyisaccepted,say A.IamgoingtochangetoVHFchannel...B.IamcertainlygoingtochangetoVHFchannel...C.ChangingtoVHFchannel...D.VHFchannel...hasbeenchanged当承受转变甚高频频道或频率时，怎样说。C更换到甚高频频道16.Whenitisacceptedtoremainonthefrequencyindicated,youshouldsay A.standingbyonVHFfrequency...BingtoVHFfrequency...C.VHFfrequency...isthebestplaceforyoutosaybyD.Remaininginfrequency...Anddonotchange当承受保持在指示的频率上，你应怎样说。A值守于甚高频频道Theword willindicatethatthemessagetransmittingpartywishestochangefromspeakingtolistening.A.out B.over C.speaking D.listening哪个单词说明发送者期望从说话换为收听。B 请讲Theword indicatesthatthemessagetransmissionisending.A.out B.over C.speaking D.listening哪个单词说明信息发送完毕。A完毕Howdoyouread?Ireadyouwithsignalstrengthone A.poor B.bad C.fair D.good收听我的声音怎样?我收听你有信号强度1. BWhenmakingVHFradiocallstonearbystations,whatleveloftransmittingpowershouldyouuse?A.Lowpower B.Medium C.Highpower D.Extrahighpower当用甚高频无线电呼叫四周站台，你应使用哪种发送功率? A 低功率Ifthereweresuddenlyanimmediatedangerforboththevesselanditscrew,wouldyousendaMAYDAYon A.Ch06withdualwatchB.Ch06with25wattsoutputC.Ch16with1wattoutputD.Ch16with25wattsoutput假设突然对船舶和船员有紧迫危急，那么你会在什么频道上发送遇险呼叫？D1625瓦22.A isannouncedby”SECURITE-SECURITE-SECURITE-ALLSTATION/VESSEL-ALLSTATION/VESSLS-ALLSTATION/VESSEL;THISISM...CALLSIGN(3X)”.A.DistressmessageB.Urgencymessage C.Safetymessage D.Routinemessage这是某某轮，呼号...” C 安全信息MAYDAYistobeusedannounce .A.a distress message B.an urgency message C.a safety message D.a message of MAYDAY用于什么 A遇险信息PAN-PANistobeusedtoannounce .A.a distress message B.an urgency message C.a safety message D.a message of PAN-PAN用于什么 B 紧急信息PAN-PANrepeatedthreetimesovertheradiotelephoneindicateswhichtypeofmessagewillfollow?A.Distress B.Safety C.ALLclear D.UrgencyPAN-PAN在无线中重复三遍说明接下来是哪种信息？D紧急信息26.A(n) indicatesthatthereisseriousdangerforvessel,crewandpassenger.A.distressalter B.urgencymessage C.safetymessage D.routinemessage什么信息说明船舶，船员和乘客有严峻的危急B 紧急信息27.A(n) indicatesthatthereisseriousandimmediatedangerforvessel,crewandpassenger.A.distressalert B.urgencymessage C.safetymessage D.routinemessage什么信息说明船舶，船员和乘客有严峻且紧迫的危急A 遇险警告28.A(n) indicatesthatthereisseriousandimminentriskfornavigationA.distressalert B.urgencymessage C.safetymessage D.routinemessage什么信息说明航行有严峻的和紧迫的危急。C安全信息29.Stopsearchandreturnto .A.keel B.virgin C.origin D.base 停顿搜寻并返回哪里。D基地30.Whatisthemeaningoftheword“ROGER“whenusedinradiocommunication?A.pleaserepeatyourmessage B.NotreadableC.Correct D.Ihavereceivedyourtransmissionsatisfactorily单词“ROGER”D.我已经满足地接收你的发送RESULTOFSEARCHNEGATIVEmeans .A.thesearchhasfoundnothing B.thederelicthasbeenfoundC.thederelicthasbeenlocated D.thederelicthasbeensighted搜寻结果没有表示什么. A搜寻什么没有觉察WhatdoestheabbreviationVHFstandfor?A.vessel”shoistingflag B.veryhighsafetyC.vessel”shomeingfrequency D.veryhighfrequencyVHF代表什么？D甚高频Whichoneofthefollowin