最新GMDSS题库英语+业务

合集下载

GMDSS英语题库

GMDSS 英语模拟试卷（1）1. GMDSS moved to full effect by 1 FEB,______. (b)a. 2000b. 1999c. 2002d. 19922. The salvage 海上救助is of_______result and the owner of the wrecked ship looksdisappointed (c) Aa. littleb. a littlec. fewd. a few3. The INMARSA T has five major components 成分,they are_______. (b)a. Space segment, NCC, NCS, RCC, and SESb. Space segment, NCC, NCS, CES and SESc. Satellites, support facilities, earth stations, SES and RCCd. Space segment, Land or Mobile station, NCC and RCC4. With the help of GMDSS,________can be alerted to a distress incident ASAP. ( c)(as soon as possible)a. all ships in a large sea areab. only the SAR authorities ashorec. the SAR units ashore and at sead. the port radios and the coast stations5. When activated in a distress situation, SART should provide survivors_____,when it is interrogated by a radar. ( c)a. 12 blipsb. special radar imaginec. visual 视觉and audible indication 音响表示d. straight line6. The portable SART is designed to be stowed on the bridge in its container, for use it, we can_____. ( c)a. throw it out into sea and it will work automaticllyb. fit in on radar aboardc. carry it to survival craft and switch on,or use it to mark the location of the mother ship.d. Not carry it to survival craft ,only use it to mark the location of the mother ship.7. Among all Navtex transmissions, _____has the extreme最后的priority.优先权a. Importantb. Routinec. V ital 极其重要的d. MSI8. It is possible for ships to receive safety message transmitted by a NA VTEX station_____. ( b)a. in any Inmarsat regionsb. in each各自NA V AREAc. in area A3 and A4d. at any distance9. MSI is broadcast via通过_________. (d)a. NA VTEXb. EGCc. HF-telexd. all of A,B,C10. The WWNWS establishes three types of navigational warning:_____. ( c)a. Distress Urgency and Safetyb. Vital, Important and Routinec. NA V AREA, Coastal and Locald. Gale, Tsunami and Ice11. MF MSI radio telex is on the frequency of______. (a)a. 518KHZb. 2182.0KHZc. 2187.5KHZd. VHF CH1612. ______receives MSI via INMARSA T SafetyNET service within the INMARSA T coverage.A. a navtex receiver b. an EGC receiver c. M/HF radio d. a VHF R/T (b)13. In addition to 除了radio equipment, the GMDSS will introduce to improve 改善the chances of survival. (b)A.HF and MF equipmentB. SART and EPIRBC. EGC and NA VTEX systemsD. INMARSA T SES14. Shipborne satellite EPIRBs capable of being activated on floating free from a sinking ship. 答案：Ca. only manuallyb. only automaticallyc. manually or automaticallyd.by remote control15. Under the manual operation, the transmission of TRON-30S EPIRB may be stopped by , the OFF position will be held. 答案：Da. turning the switch back to OFF positionb. remounting the locking pinc. putting it into waterd. A and B16. Under the automatic operation, the transmission of TRON-30S EPIRB will stop when . 答案：CA. putting it into waterB. turning the switch back to OFF positionC. the beacon is lifted out of the waterD. the beacon is in the upright position17. is designed to send an automatic distress alert when a ship sinks suddenly. ( C)a. lifeboatb. A survival craftc. An EPIRBd. A SART18. It is optional for marines to combine 结合the SART with . 答案：Ba. a satellite SESb. a float-free satellite EPIRBc. a EGC receiverd. a NA VTEX receiver19. A station in the mobile service the emissions发射of which are intended to facilitate search and rescue operations is 答案：Ca. Ship Stationb. LESc. EPIRB Stationd. NCS20. In the COSPAS-SARSA T, satellite EPIRBs function on the frequencies of . 答案： Ba. CH70/243 MHzb. 406/121.5 MHzc. 121.5/243 MHzd. 406/1.6 GHz21. If a ship happens to be in distress in Area A4, EPIRB is to be used for distress alerting. 答案：ba. 1.6 GHzb. 406 MHzc. Inmarsatd. A, B, C are right22. The EPIRB battery should be renewed every . 答案：Ba. 2 yearsb. 4 yearsc. 1 yearsd. 3 years23. The auto-operating of the satellite EPIRB is mainly controlled 被控制的by . 答案： Ca. the switch on the top of itb. the battery unitc. the mercury switch水银开关in the battery unitd. sea conditions24. The EPIRB should be mounted 装好在架子上的to be protected from保护harmful 有害的conditions. 答案：Ca. at a regular placeb. anywhere on boardc. at the higher place on the vesseld. in one of the holds25. The mounting place of EPIRB should be suitable for合适的? 答案：Da. testingb. maintenancec. commissioningd. A and B26. In EPIRB, if the switch is held in ―TEST‖ for additional , the test procedure willbe repeated. 答案：Ca. 5-8 secondsb. 10-15 minutesc. 10-15 secondsd. 5-8 minutes27. Under the automatic operation, the transmission of TRON-30S EPIRB willstart . 答案：Da. when it is in an inverted positionb. after it is put into waterc. until it is in water of some depthd. as soon as it is put into water in the upright position 垂直位置[状态]28. The EPIRB may sea water, chemicals and any other environmental conditions.a. work well regardless ofb. be damaged byc. get rid ofd. not be destroyed by答案： B29. It is for mariners to combine the SART with a float-free satellite EPIRB.a. essentialb. compulsoryc. optional 任选的; 随意的; 非强制的d. inadvisable答案: C30.The Inmarsat satellites over the major ocean regions cover the globe ___________. ( d)A.besides the polar regionsB. including the North Pole and the South PoleC.above 700N and below 700SD. as far north and south as 70031. There are some back-up satellites in the event of如果...发生failure. 故障; 失灵If the operational satellite is out of work, _______________. (b)A.the whole system will not workB. the back-up one will take its placeC.all communications in the system will be ceasedD. the system will be no longer exist32. Geostationary 对地静止satellites in the Inmarsat system are the artificial satellites which _________ .A. always move slowlyB. sometimes move and sometimes don‘t( C)C.are synchronizing 同步with the movement of the earthD. are in one place only33.IMN is an ________ for each SES. AA.INMARSA T Mobile NumberB. International Mobile NumberC.INMARSA T Maritime NumberD. International Maritime Nation34.A radio determination system based on the comparison of reference signals 参考[基准]信号with signals reflected 反射or retransmitted 转发from the position to be determined, is the ________. Ca)DF B. DSC system C. Radar system D. COSPAS-SARSA T system35.For ship-to-shore distress alerts, we can use _______. Ba)INMARSA T, VHF and SART B. INMARSA T, EPIRB and DSCC. NA VTEX, NBDP and TelexD. Radar, SART and R/T36.The working range of a VHF coast station is normally __________ nm. AA. 20 to 30B. 150C. 450D. over 15037.To establish a communication channel信道for the telex service in the Inmarsat-A terminal,you should first _________. Ba)establish a channel from the CES, via the International Telex Network to the finaldestinationb)set up a communication channel from your SES, via通过 a satellite, to a CES withinyour ocean regionc)set up a channel directly to the final addressee at the destinationd)establish a channel from your terminal, via the Telex Network to a CES within the sameocean region as your SES38.In the GMDSS, MSI broadcasts will be made on two dedicated systems providing continuousautomated reception on board ships. They are __________. BA. DSC system and Navigational systemB. INMARSA T SafetyNet and NA VTEXC. COSPAS-SARSA T and EGC systemsD. MF/HF, VHF and MBDP systems39.General communication in the global system are those between ___________ concerning themanagement and operation of the ships and may have impact on ship‘s safety. Ca) a ship station and any coast station B. SAR party and ship in distressC. ship stations and shore-based communication networksD. ships and authorities40.The existing terrestrial radio system has some basic flaws which __________. Ba)can be overcome by traditional techniques B. can be overcome by satellite and digitaltechniques C. cannot be tackled by any modern means D. will not be overcome41.The world‘s first communication satellite, Telstar, was put into orbit in ________. AA. 1962B. 1960C. 1975D. 195742.There are _______ operational satellites in the INMARSA T system now, covering the globeexcept the polar regions. CA. 3B. 8C. 4D. 1243.The maritime access code for POR is _______ in INMARSA T-A Telex service. BA. 581B. 582C.872D. 87144._________ is designed to give automatic distress signals when a ship is sinking suddenly. Aa)An EPIRB B. A SART in a life boat C. A VHF transceiver D. An SES45.In accordance with _________, the training of GMDSS operators should be conducted. Da)SOLAS 1974 B. IMO Assembly C. W ARC D. STCW 9546.When TRON-30S S-EPIRB is _______, the auto-transmitting will start. Aa)put into water in the upright position B. switched on by the operatorC. stored in an inverted positionD. mounted up on the ship47.Any ships fitted with SES can _______ and ______ through the satellite system when sendingdistress alerts. Ba)contact an RCC/IMO authorities B. have absolute priority to enter the system/makecontact with a CES C. establish communication with INMARSA T/access to theircompany D. save any ship in distress/be no longer in danger48.There are ______ NCSs in total for INMARSA T-A system. DA. 3B. 2C. 1D. 449.The Network Coordination Station for INMARSA T-A in the Pacific Ocean Region is in____________. CA. Beijing, ChinaB. Perth, AustraliaC. Y amaguchi, JapanD.Goonhilly, UK50.Each COSPAS-SARSA T LUT can locate 406MHz EPIRBs transmitting ___________. CA. from sea area A3 onlyB. to CESsC. from anywhere on the globeD.to RCC51.COSPAS-SARSA T alert data from LUTs, both in the local mode (121.5MHz and 406MHz)and in the global mode (406MHz only), have to be distributed to the ________. Da)appropriate CES B. NES concerned C. appropriate system D.RCC concerned52.The RCC concerned or appropriate RCC means that ___________. Aa)this RCC is defined according to the position of the distressb)the RCC is operating correctlyc)an RCC works welld)the position of the RCC has not been decided53.General communications _____________. Da)are between ship stations and shore-based communication networksb)concern the management and operation of the shipc)may affect the safety of the shipd)A, B and C54.______ receives MSI via INMARSA T SafetyNET Service within the INMARSA T coverage.BA.a NA VTEX receiverB.an EGC receiverC.an MF/HF radioD.a VHF R/T55.The NCC is located in the ___________. CA. IMO Headquarters in LondonB. International Maritime Safety CommitteeC.INMARSA T Headquarters in LondonD. Western Maritime Organization56.There is actually an overlap of _________ ocean regions somewhere in Western EuropeWaters. Aa)as many as three B.more than twoC. less than twoD.up to four57.Mariners should pay much attention in the overlapped areas owing to ___________. Da)complicated circumstances there B. changeable atmospheric pressureC. large density of trafficD. some strong signals from unwanted satellite58.A distress alert can be relayed from an RCC by _________. Ba)major coast stations B.satellite and terrestrial communicationsC. COSPAS-SARSA TD. MF/HF and VHF stations59.On receipt of a distress alert, the SAR units ashore and at sea will ______ soonest. Aa)give assistance coordinately in rescue operationsb)send rescue vesselsc)reach the distress aread)conduct a sector search60.The requirements of shipborne communication equipment vary according to _________. Ba)the types of ships B. the area (or areas) in which the ship operatesC. cargo which the ship loads on boardD. tonnage of the ship61.The Chapter IV of SOLAS Convention is about _______. DA. Navigational WarningsB. Maritime Terms and DefinitionC. GMDSS InstructionsD. Maritime Communications62.The power of each NA VTEX transmitter is regulated so as to avoid the possibility ofinterference producing between _______. Ba)signals B. transmitters C. receivers D. calling systems63.Which of the following statements is correct? Ca)International NA VTEX Service uses multiple frequencies to transmit from NA VTEXstationsb)NA VTEX Service utilizes any frequency to transmit MSI from nominated stationsc)International NA VYEX Service utilizes a single frequency to transmit MSI fromNA VTEX stationsd)NA VTEX Service uses many frequencies, transmitting MSI from any stations in theworld64.______________ designated 16 NA V AREAs all over the world. DA. INMARSA TB. IHOC. IMOD. Both B and C65.There is a distance of at least ________ nm between two NA VTEX stations with the same B1character. CA. 200B. 150C. 800D. 40066.The difference between International and National services is laid on ___________. AA. frequencies and languagesB. time and areasC. languages and informationD. areas the ships operateually a NA VTEX station transmits messages only for ______ every ______ hours. Ca)twenty minutes/two B. one hour/three C. ten minutes/four D. thirty minutes/two68.The messages transmitted by each NA VTEX station are controlled according to _______.Da)languages B. information C. geographical coverage D. B and C69.Each transmitter has a single unique letter ______ as an identification code. AA. B1B. B2C. B3D. B470.The NA VTEX ______ uses the subject indicator character B2 for the message identification.a)transmitter B. SES C. CES D. receiver (D)71.The subject indicator A is for __________. Ca)Ice Report B. Meteorological Warnings C. Navigational Warnings D. Pilot Service72._________ will be stopped by turning the switch of the EPIRB back to OFF position. Ca)Automatic operation B. Transmission C. Manual operation D. Installation73.If the switch of an EPIRB is held in TEST position for additional 10-15 seconds, the testprocedure will be _________. Da)started B. Stopped C. removed D. repeated74.Any operation of the EPIRB is dependent on that the beacon is in ______ position. Ba)OFF B. ON C. an upright D. an inverted75.The lower half of the EPIRB housing contains ________. Da)the antenna B. switches C. controllers D. the battery pack76.In manual operation of the EPIRB, break the seal on the switch and pull the locking pin, theswitch will automatically ________. Aa)go to the emergency position B. be off C. be turned OFF D. B and C77.Though the EPIRB is mounted quite high up on the vessel, it must be __________. CA. difficult to touchB. hard to be testedC. easily accessible ,possible for maintenanceand test D. impossible to relieve freely from the frame78.________ of the EPIRB is mounted in the battery unit. Aa)A mercury switch B. The transmitter C. The controlling switch D. ADE79.The INMARSA T-C system can also offer _______ services for maritime environment. Da)Polling Reporting B. Position Reporting C. Data Reporting D. A, B and C80.GMDSS moved to full effect by 1 Feb, ____________ BA. 2002B. 1999C. 1992D. 200081.The GMDSS defines _________ sea areas based on the location and capability of shorebased communication facilities. DA. threeB. sixC. fiveD. four82.Sea Area A2 is an area within the coverage of at least one MF coast station. Normallythe range of it is _____________ nm. AA. 20 to 30B. 150C. 65D. 8083.The position of the POR satellite in the Inmarsat system is ____________ above theequator. DA. 55.5B. 64.5C. 15.5D. 17884.The meaning of RCC is ________________ CA. Rescue Control CentreB. Receive Company CableC. Rescue Coordination CentreD. Remain Course Continuously.85.A NA VTEX receiver receives MSI broadcast from ________________. AA. NA VTEX stationsB. RCCsC. NCCsD. SafetyNET service86.For locating the ship in distress, the SAR party will make use of ___________ bystarting 9 GHz shipborne or airborne radars BA. DSCB. SARTC. EPIRBD. NBDP87.SOLAS vessels are able to communicate with shore stations _____________ AA. no matter where they are and what the time it isB. in major oceans and at scheduled timeC. at regular times everydayD. from some fixed positions88.The INMARSA T system has five major components, they are: ___________. CA. Space Segment, NCC, RCC,SES and CESB. Space Segment, a satellite system, C system, NCC and NCSC. Space Segment, NCC, NCS, CES and SESD. A system, C system, satellite system, earth stations and NCS89.Any radio communication service which is used for the safeguarding of human lifeand property, whether permanently or temporarily, is a _______________ service CA. PublicB. RadioC. SafetyD. Emergency90.A mobile earth station in the maritime mobile-satellite service, which is located on boardship, is called ___________ BA. an LESB. an SESC. a ship stationD. a Land Mobile Station91._______is the center of the frequency band assigned to a station. AA. assigned frequencyB. working frequencyC. MF bandD. distress frequency92._______is a space system using one or more artificial earth satellites. DA. satellite networkB. Satellite LinkC. INMARSA TD. Satellite System93.General communications_______________ DA. concern the management and operation of the shipB. may affect the safety of the shipC. are between ship station and shore-based communication networkD. A, B, and C94.________receives MSI via INMARSA T SafetyNet service within the INMARSA T coverage.BA. a NA VTEX receiverB. an EGC receiverC. a MF/HF radioD. a VHF R/T95.The NCC is located in the ______________ BA. IMO Headquarters in LondonB. Inmarsat Headquarters building in LondonC. Western European Maritime OrganizationD. International Maritime Safety Committee96.The Network Coordination Station for the INMARSA T-A coast stations in the Pacificocean region is in _________________ AA. Yamaguchi, JapanB. Beijing, ChinaC. Nakhodka, RussiaD. Perth, Australia97.There are ______________NCSs in total, one in each ocean region, the AOR (E and W),IOR and POR. DA. 3B. 2C. 1D. 498.Mariners should pay much attention in the overlapped area owing to _____________ DA. complicated circumstancesB. changeable atmospheric pressureC. large density of trafficD. some strong signals from unwanted satellites99.There is actually an overlap of____________ ocean regions somewhere in Western AEuropean Waters.A. as many as threeB. more than twoC. less than twoD. up to four100. The requirement of shipborn communications equipment vary according to the______________ DA. type of the shipB. cargo which the ship loads on boardC. tonnage of the shipD. area (or areas) in which the ship operatesGMDSS 英语模拟试卷（2）1. Radio System _______about 100 years ago.A.has been used at seaB.saved the lives of tens of thousands of peopleC.is used by marinersD.came into use at seaD2. In_____,the world first communication satellite was put into orbit.It was Telstar.A.1966B.1962C.1975D.1960 B3. The existing system has ______basic flaws which can not be overcome using traditional ,terrestrial techniques. CA. a great deal ofB.a large amount ofC.the number ofD.lots of4. It was the Telstar that_____at that time. AA.improved the world communicationsB.introduced a new life-saving systemC.saved many distress shipsD.covered all major ocean regions5. Geostationary satellites are the man-made satellites which_____ CA.are always fixed in the regular positionB.sometimes move with the earthC.are synchronizing with the movement of the earthD.can not fly off from the ground10. Since it___first used at sea,radio____helped to save the lives of tens of thousands of people.A.was/wasB.is/hasC.was/hasD.was/had C11. Before the introduction of satellite communications,it is____for anyone else on board to use the telegraphy equipment if something happens to radio operator.A.possibleB.unlikelyC.easyD.convenient B12. The letter D is the abbreviation for the word distress in_______.A.ADEB.NBDPC.GMDSSD.DSC C13. The letter G in GMDSS is the abbreviation for the word in GMDSS____.A.GlobeB.GeneralC.GlobalD.Group C14. In traditional terrestrial system, if something _____the radio operator, it is unlikely that anyone else on board will be able to use the telegraphy equipment.A.has forB.happens toC.would beD.was B15. There is little chance of the frequencies _____for maritime purpose being increased.A.allocatedB.spentC.putD.submitted A16. Telstar, the world’s first communication satellite,was_____in 1962.A.returned backB.flying into skyC.put into orbitD.destroyed C17. One of the drawbacks to the use of radio is the fact that some radio waves travel in ___.A.the earthB.the moonC. straight linesD.curves C18. ___is the united nations agency responsible for the Radio Regulations among other things.A.ITUB.IMOC.MSCD.WMO A19. Distress alerts will be acknowledged_____.A.manuallyB.automaticallyC.manually or automaticallyD.by radiotelephone A20. Only the polar regions,where shipping is infrequent,are not covered. In this setence,’shipping’ means______.A.shipsB.shipping industryC.navigation of shipsD.shipping company C21. The position of the POR satellite of the Inmarsat system is ________ above the equator. DA.55.5O WB. 64.5O EC. 15.5O WD. 178O E22._______ is the center of the frequency band assigned to a station. AA. Assigned frequencyB. Working frequencyC. MF bandD. Distress frequency23. ________ is a space system using one or more artificial satellites. DA. Satellite networkB. Satellite linkC. INMARSA TD. Satellite system24. ________receives MSI via INMARSA T SafetyNET service within the INMARSAT coverage. BA. A NA VTEX receiverB. An EGC receiverC. An MF/HF radioD. A VHF R/T25. There are ______ NCSs of INMARSAT-A system in total, one in each ocean region (the AOR- East and West, the IOR and the POR). DA. 3B. 2C. 1D. 426. There is actually an overlap of _______ ocean regions somewhere in the world. AA.as many as threeB. more than twoC. less than twoD. up to four27. ________ is designed to give an automatic distress signal when a ship sinks suddenly. CA. A lifeboatB. A survival craftC. An EPIRBD. A SART28. A radio determination system, based on the comparison of reference signals with radio signals reflected or retransmitted from the position to be determined, is a________ system. BA. DFB. RADARC. DSCD. COSPAS-SARSAT29. IMN is an __________ allocated to an SES. CA. International Mobile NumberB. INMARSA T Maritime NumberC. INMARSA T Mobile NumberD. International Maritime Number30. Operating method in which transmission is possible simultaneously in bothdirections of a communication channel is termed __________. AA.Duplex OperationB. Simplex OperationC. Auto-OperationD. Two-Way Communication31. ________ communications are internship VHF radio telephone communications for the purpose of safe movement of the ships. CA. SafetyB. UrgentC. Bridge-to-BridgeD. Distress32. When you have received GA+ from the CES for the INMARSA T-A telexcommunication, you should immediately select _______ and ______ yourequired. CA. a CES/telex modeB. an SES/telex serviceC. the service/the subscriberD. a satellite/an ocean region33. _________ means rapid and successful reporting of a distress incident to a unit that can provide or coordinate assistance. BA. Distress InformationB. Distress AlertingC. Safety CallingD.Digital Selective Call34. There are ________ for the mariners to receive SafetyNet messages. DA.some chargesB. a few chargesC. more costsD. no charges35. SOLAS vessels should be able to communicate with shore stations _________ according to the SOLAS Convention. DA.in major ocean regions and at regular timesB.in case of distress and for exchange safety informationC.at any time and from any locationD. B and C36. On-scene communications are between the _____________. BA.ship stations and the coast stationsB.SAR party and the ship in distressC.RCC and SAR partiesD.Ship in distress and the SAR authorities ashore37. The Inmarsat SES operator can choose the most suitable CES accordingto_______. AA.the service and the positionB.time and courseC.tide and speedD.types and sizes of the ships38. COSPAS-SARSAT comprises ____________. AA.several near polar-orbiting satellites and a network of land-based earthstationsB. a satellite and some earth stationsC. a lot of satellites and an earth stationD.only one satellite and one ground earth station39. A radio link between a transmitting earth station and a receiving earth station through one satellite, which comprises an up-link and a down-link, is _________.A.Satellite NetworkB. Communication LinkC. Satellite LinkD. INMARSA T C40. Without the permission of _________, an SES cannot enter the Inmarsat system. CA. ITUB. IMOC. INMARSA T OrganizationD. the CES concerned41. The satellite and support facilities operated by INMARSA T are based on_________ operational regions. BA. 3B. 4C. 16D. 542. DSC distress acknowledgements are normally transmitted by ________ in response to a received DSC distress call. BA.ship stationsB. coast stationsC. NCSsD. NCC43. A station in the mobile service the emissions of which are intended to facilitate SAR operations is ___________. AA. an EPIRBB. a SARTC. a Mobile Satellite Earth StationD. an SES44. Please use _______ for _______ according to the Manual of International SAROperations. CA.Chinese/distress callsB. the languages decided by theAdministrations/DSCC. English/all distress callsD. Japanese/some distress calls45. During a period of __________ as a newly commissioned SES, your IMN will beinformed to other CESs throughout the world. DA. 20 hoursB. 12 hoursC. 24 minutesD. 24 hours46. A distress alert can be relayed from an RCC by __________. DA.terrestrial systems using appropriate frequenciesB.satellite communications to SESsC.any major CESs and SESsD.both A and B47. COSPAS-SARSAT provides distress alerts and location information to appropriaterescue authorities, _________ for ________ in distress. DA.over all major ocean regions/all shipsB.in the polar regions/some ships and aircraftC.below the North Pole and above the South Pole/ocean-going shipsD.anywhere in the world/maritime, aviation and land system users48. An SES operator can choose the most suitable CESs according to ________. DA.the routing agreement for a particular ocean regionB.the communication services he requiredC.the positions of his own ship and the CESsD. B and C49. NA VTEX receivers also use the B2 characters to _______the different classes ofmessages. AA.identifyB. rejectC. print outD. correct50. NA VTEX technical code B1 is a single unique letter which is allocated to eachNA VTEX __________. DA. receiverB. messageC. equipmentD. transmitter51. The WWNWS is a coordinated global service for the broadcast by radio of vitalinformation on ________ to marine navigation. DA.ship‘s movementB. safetyC. ship‘s managementD. hazards52. Among all NAVTEX transmissions, _____ has the extreme priority. CA.IMPORTANTB. ROUTINEC. VITALD. MSI53. _______ is intended to transmit general public information to groups of ships.A. SafetyNETB. FleetNETC. MSID. System Message B54. International SafetyNET and NA VTEX services promulgate MSI by means of____. BA.FEC and ARQB. satellite and terrestrial communicationsC. EGC and VHFD. NBDP and FleetNET55. SafetyNET is an MSI broadcast service offering ______ on suitable ships.A.free receptionB. free transmissionC. dedicated receivingD. somecharges A56. SafetyNET Service is able to address the call to ________. DA.all shipsB. selected groups of shipsC. a particular shipD. A, B, C and D57. The priority of EGC messages is classified as follows: ________________. DA. distress, urgent and safetyB. safety and routineC. emergency, safety and routineD. distress, urgent, safety and routine58. All EGC messages _______ owing to their nature of importance. CA.can suppressB. will be suppressedC. can not be suppressedD.aresuppressed59. If the EGC receiver shares a same antenna with INMARSA MES, it will receive。

GMDSS新统考英语题库3

GMDSS新统考英语题库3GMDSS通信英语阅读考卷31. In INMARSAT-B “Priority 0” means ____ communication.A. routineB. distressC. urgencyD. safety2. The GMDSS was adopted by amendments in ____ to the SOLAS convention 1974.A. 1992B. 1988C. 1999D. 19793. The INMARSAT safety NET Service covers____A. A3B. A2+A3C. A1+A2+A3D.A1+A2+A3+A44. Each NA VTEX message ends with an end of message function ____A. NNNNB. KKKKC. ZCZCD. NCNC5. Which of the following belongs to High Frequency band? ____A.415~4000KHZB. 4~27.5 MHZC. 156~174 MHZD. 300~3400 HZ6. The NCS of INMARSAT-C system in POR is____A. GOONHILL YB. SENTOSAC. SOUTHBURYD.YAMAGUCHI7. Please choose the Inmarsat-C NCS ID of the AOR-W ____A. 044B.001C.211D.1448. Where is the distress alerting made by MES in the INMARSAT system passed to? ____A. MCCB. RCCC. LESD. NCS9. What kind of transmission mode will be used in VHF telephone voice communication? ____A. J3EB. G2BC. F1BD. G3E10. Communication using fax of Inmarsat-F, the country code of China is ____A. 868B. 11C. 86D. 8511.Which service does not EGC have? ____A. N/WB. MSIC. SafetyNETD. FAX12. The main contents of PSC for Inmarsat-C is____A. log of informationB. the setting of printerC. PV testD. the function of ship reporting13. What does ITU stand for?A. International Telephone UnionB. International Telecommunication UnionC. International Telecommunication UnitD. International Telex Unit14. IMN is an ____ for an SES.A. International Mobile NumberB. INMARSAT Maritime NumberC. INMARSAT Mobile NumberD. International Maritime Number15. ____ are also distress traffic.A. signals for locatingB. safety servicesC. light signalsD. VHF16. When a ship sinks, a ____ satellite EPIRB is ____ activated.A. stationary/automaticallyB. float free/manuallyC. vertical/automaticallyD. float free/automatically17. The NA VTEX receiver can be mounted ____A. on the bridgeB. in the coast stationC. oil the forecastleD. on starboard side18. The ground segment of Inmarsat consist of ____A. Land Earth StationsB. Network Co-ordination StationsC. Network Operations CentreD. A.B.C19. What shall be transmitted to avoid all ships in a large sea area being alerted?____A. area callB. distress callC. urgency callD. DSC call20. The SART can ____ .A. permanently install in the survival craftB. operate in a float-free positionC. be incorporated into a float-free S-EPIRBD. all are right21. ____ will form the basis for distress alerting and safety calling.A. GMDSSB. EGCC. MSID. DSC22. Which 2 digit code is maritime assistance offered by LES as specified in the Radio Regulations under GMDSS?____A. 32B.38C.39D.3323. The concept of MSI has been developed to bring together the various sources of this vital information into a combinednews broadcast suitable for all ships in all ____A. major area of the globeB. principal waters of the globeC. minor waters or narrow watersD. some special waters of the globe24. Which institution monitor and control the communications traffic of the LES within the ocean region? ____A. RCCB. NCSC. NOCD. MCC25. When a vessel in distress making On-scene communications, which one of the following radio equipments can be used____A. VHFB. MF/HF radio equipmentC. Inmarsat MESD. all of above26. Where does the RCC of the China locate in? ____A. BeijingB. ShanghaiC. DalianD. Tianjin27. Which mode of communications is possible through an Inmarsat –F MES? ____A. SITORB. telexC. telephoneD. DSC28. Which of the following is not a DSC calling content? ____A. ACK BQB. ACK RQC. EOSD.ARQ29. How many frequencies designated for DSC international distress and safety frequencies on HF band? ____A. 4B. 5C. 6D. 730. W hich definition’s meaning is the “FAX using phase modulation”? ____A. G3EB. F3EC.G2BD.F3C31. Which of the following is NOT included in urgency DSC calling? ____A. identification of calling shipB. category of priority: urgencyC. identification of called shipD. the urgency signal PANPAN32. Which type of the following services is excluded from Inmarsat-F services? ____A. telephoneB. high speed data transmissionC. telexD. E-mail33. The PIN becomes blocked if the PIN code is entered incorrectly several times when operating capsat-F77 MES.The maximum of input is____A. 4B. 5C. 6D.334. The command “KKKK” is used to ____A. clear connection with land subscriberB. clear connection with Maritime Radio StationC. clear connection with mobile subscriberD. for breaking radio connection35. Which command is used for a radio medical connection with coast station? ____A. MSG+B. TEST+C. SOS+D. MED+36. Distress messages of the DSC are automatically broadcast to____A. all stationsB. coast stationsC. ship stations nearbyD. group of specified stations37. The VHF CH06 is used for____A. intership and ship-aircraft communicationB. distress & safety communicationsC. ship-shore and ship-ship communicationsD. all of above38. The MMSI number 041211111 is ____A. a ship station’s MMSI numberB. a shore station’s MMSI numberC. group of ships’ MMSI numberD. a land user’s fax number39. What is the frequency range for Medium Frequency? ____A. 30 to 300khzB. 300 to 3000khzC. 1000 to 10000khzD. 10 to 30mhz40. Which modes could be selected to receive vessel traffic lists from high seas shore stations? ____A. AM and VHF-FMB. SSB and FECC. ARQ and FECD. VHF-FM and SSB41. At mid-day, what would be the best choice in attempting to communication with a shore station 50 miles distant?A.VHFB. 22 MHZ bandC. 16 MHZ bandD. MF42. What does the term “ARQ” mean? ____A. Automation Repeat RequestB. Automatic Repeat RequestC. Automation Request RepeatD. Automatic Request Repeat43. What are the characters that are transmitted to terminatea direct telex connection in NBDP operation? ____A. “…..”B. KKKKC. END+D. EOM44. Which of the following is true of ARQ mode? ____A. This is an interactive modeB. Each character is repeated three timesC. each character is transmitted twiceD. This mode is generally used to broadcast messages45. Which of the following ID number is used for BEIJING LES telephone access code in AOR-E? ____A. 118B. 868C. 311D. 21146. How many total frequencies are available for DSC distress alerting? ___A. oneB. twoC. fiveD. seven47. You send a HF-DSC alert on 8414.5khz. What frequency do you use for the telex transmission? ____A. 8376.5khzB. 8291.0khzC. 8401.5khzD. 8201.0khz48. What is the MID? ____A. Mobile Identification NumberB. Maritime identification DigitsC. Marine Indemnity DirectoryD. Mobile Interference Digits49. The priority of all navigational warnings and meteorological forecasts is ____A. safety priorityB. urgent priorityC. distress priorityD. ship business priority50. What is the drum speed of a station if the Index of Co-operation is 576? ____A. 90B. 60C. 240D. 12051. What is the positioning accuracy of the EPIRB in the COSPAS/SARSAT? ____A. 1 to 2 nmB. 2 to 3 nmC. 5 nmD. 10 nm52. Complying with IMO requirements, the detection range between a SART and a search RADAR is ____A. 8.0 nmB. 2.5 nmC. 2.0 nmD. 5.0 nm53. Which piece of required GMDSS equipment is the primary source of transmitting locating signals?A. Radio Direction FinderB. An EPIRB transmitting on 406MHZC. Survival Craft TransceiverD. A SART transmitting on 406MHZ54. For COSPAS-SARSAT system, ____ transmit distress alert and location information to appropriate rescue authorities all over the world.A. Polar orbiting satellitesB. Ground receiving stationsC. MCCD. ROC55. Which type of Inmarsat MES terminals use omni-directional antenna? ____A. Inmarsat-AB. Inmarsat-BC. Inmarsat-CD. Inmarst-F56. Port State Control (PSC) is the inspection of ____ in national ports.A. national shipsB. foreign shipsC. cargo shipsD. passenger ships57. What system provides accurate vessel position information to the GMDSS equipment? ____A. GPSB. COSPAS-SARSATC. InmarsatD. NBDP58. When testing with coast station using DSC in PSC checking, the priority of the calling is? ____A. distressB. urgencyC. safetyD. routine59. The General Operator’s Certificate valid for ____A. three yearsB. four yearsC. five yearsD. six years60. The log of the ship radio valid for ____A. half a yearB. one yearC. two yearsD. three years61. Both the satellite communication and terrestrial communication will____A. not be used in the GMDSSB. be used only for general communicationC. be replaced by MorseD. be used in the GMDSS62. If we want to communicate with Guangzhou station by RT, we find out the channel of the station in the ADMIRALTY LIST OF RADIO SIGNALS____A. V olume 1B. Volume 2C. V olume 3D. V olume 563. Which terminal is used to alert to ships by distress vessel? ____A. EPIRBC. MESD. DSC64. Which of the following frequencies is used for intership MF DSC call ? ____A. 2182KHZB. 2187.5KHZC. 2177KHZD. 2414.5KHZ65. Which frequencies can not be used for ship-aircraft communication? ____A. CH06B. 3023KHZC. 2182KHZD.5680KHZ66. The transition period in implementation of the new GMDSS system is ____ years.A. 6B. 7C. 8D. 967. Which of the following frequencies and modes is allocated for distress alerting in GMDSS? ____A. 406MHZ to via EPIRBB. 1626.5~1645.5MHZ via InmarsatC. Channel 70 DSC plus six MF/HF DSC frequenciesD. All of the above68. Which service is a more cost-effective solution for applications where there is no need for constant transmission of data in both directions? ____B.MPDSC. ISDLD. CDMA69. ZCZC HD36090710UTC MAY 2008OVERBOARDUNMANNED FISHING VESSEL HOUSHOU MARU（2 TONS，ONE CREW）W AS SIGHTEDIN POSITION 32-57.5N 129-28.5EAT 080701UTCTHE CREW SEEMS TO HA VE FALLEN OVERBOARD SHIPS IN THE VICINITY ARE REQUESTEDTO KEEP A SHARP LOOKOUT AND REPORTANY INFORMATION TO MSA JAPANNNNN(1) What does this message talk about?A. FishingB. OverboardC. ReportD. Lookout(2) What does MSA concern in this passage?A. A Japanese fishing vesselB. An organization takes charge of SARC. A shore radio stationD. None of above(3) What is transmitter indicator character in this message?A. DB. EC. HD. N(4) When was this message broadcast?A. 2010.9.7B. 2009.7.10C. 2008.7.1D. 2008.5.970. The 64 kbit/s data service supports applications between ISDN terminals using ISDN protocols such as V.120 or X.75. it will support any 64kbit/s data stream and is the service used for implementing ISDN applications such as video conferencing, LAN routing, file transfer, broadcast- quality audio transmission and secure telephone.The service is accessed primarily through the RJ-45 connector on the Mobile Satellite Unit. Multiple ISDN devices (up to eight) can be attached to the MSU.A point-to-point protocol (PPP) modem data service, suitable for file transfer, e-mail or internet access, may also be available via an RS-232 interface, USB port or infrared port.With Inmarsat Mobile ISDN, the customer uses a dedicated line or channel between the mobile equipment and the satellite. This channel provides up to 64kbit/s of bandwidth. Users are charged by the length of time this dedicated channel is allocated. Because of the global growth of ISDN, a whole arrange of telecommunications applications that were once the domain of large corporations have now become cost-effectively available to even the smallest of businesses. Dial-up networking using ISDN enables any number of Local Area Networks (LANs) to be quickly and easily linked. Other services available through the Mobile ISDN are video conferencing and broadcast-quality audio.An ISDN call typically takes less than five seconds to connect, which is something to take into account when the call is over a satellite communications system. With the introduction of the Inmarsat Mobile ISDN service, there is no longer any reason why people working in remote locations should not enjoy the sophisticated IT solutions that are t aken for granted in today’s office.(1) What does MSU mean? _____A. Maritime safety UnitB. Mobile Satellite UnionC. Mobile Satellite UnitD. Marine Security Union(2) Users are charged by _____ for the Inmarsat mobile ISDN 64kbps service?A. the length of time the dedicated channel is allocated.B. the number of characters being sent.C. either the duration or the number of letters sent.D. this passage does not tell us.(3) What kind of services is available through the Mobile ISDN? ____A. video conferencing and secure telephonyB. broadcast quality audioC. file transfer and LAN routingD. all of the above(4) The channel between the mobile equipment and the satellite for mobile ISDN provides up to of bandwidth? ____A. 4.8kbpsB. 9.6kbpsC. 64kbpsD. 128kbps71. For ships equipped with an Inmarsat SES, sending a distress alert is both simple and certain. It only involves pressing a special distress button or using an abbreviated dialing code. This automatically gives priority access to the system and establishes contact with a CES via the Inmarsat satellite.The SES operator can choose the most suitable CES for the communication service required, as long as the CES is within the same ocean region as the SES. The shore Inmarsat user does not have the flexibility and is limited to using the CES through which his local PTT administration has a routing agreement for a particular ocean region.(1) It is quite _____ for SES operator to send a distress alert.A. difficult and stableB. easy and expensiveC. easy and reliableD. possible and compulsory(2) Any ships with SES can ____ and ___ through the Inmarsat satellites when sending a distress alert.A. establish contact with the system/contact with RCCB. enter the system gradually/contact a coast stationC. enter the system manually/contact with any CESD. have absolute priority to enter the system/contact a CES(3) The SES operator cannot set up communication througha CES, _____ it’s within the same ocean region as the SES.A. onceB. ifC. unlessD. when(4) Which of the following acronyms has the different meaning for the sa me letter of “S”? _____A. CESB. SESC. NCSD. MSI72. Ships receiving a DSC distress alert from another ship should normally not acknowledge the distress alert by DSC since acknowledgement of a DSC distress alert by use of DSC is normally made by coast stations only.If a ship station continues to receive a DSC distress alert on an MF or VHF channel, a DSC acknowledgement should be transmitted to terminate the call only after consulting with a RCC or a coast station and being directed to do so.Ships receiving a DSC distress alert from another ship also defer the acknowledgement of the distress alert by radiotelephony for a short interval, if the ship is within an area covered by one or more coast stations, in order to give the coast station time to acknowledge the DSC distress alert first.(1) Any ship should____ after receiving a DSC distress alert from another ship.A. acknowledge the distress alert by DSC immediatelyB. not acknowledge the distress alert by DSC immediatelyC. acknowledge the distress alert on MF or VHF channelD. terminate the call(2) Ships receiving a DSC distress alert may ____ after getting permission from RCC.A. transmit the callB. receive the callC. stop the callD. continue to receive the call(3) Ships receiving a DSC distress alert should makeacknowledgement _____.A. immediatelyB. as soon as possibleC. after a short timeD. as late as possible(4) What’s the main idea of the passage?_____A. DSC distress alert transmissionB. DSC distress alert receptionC. Acknowledgement of a DSC distress alertD. DSC distress alert control。

GMDSS业务题库

GMDSS业务题库一、单选题1、GMDSS全面实行日期为（）。

A、99年2月1日B.92年2月1日 C.93年2月1日 D.95年2月1日2、下面那一项不属于GMDSS的功能（）：a)现场通信B、遇险报警C、船位报告D、常规通信3、GMDSS中遇险报警指（）：a)船对岸的报警B、船对船的报警C、岸对船的报警D、以上都是4、下面那一项不属于GMDSS的七大功能（）：a)搜救协调通信B、搜救现场通信C、船队业务D、常规通信5、根据国际海事组织规定，世界上共划分了（）个搜救区域。

A、26B、16C、13D、246、GMDSS海区划分为（）个。

A、1B、2C、3D、47、GMDSS设备配备主要是以照船舶（）进行配备。

A、吨位B、航行的海区C、大小D、动力8、A3海区船舶遇险报警可使用（），实现船到岸报警。

A、INMARSA T 设备；B、HF DSC;C、EPIRB.D、以上都可以。

9、没有报警功能的设备为（）：A、EPIRBB、SARTC、DSCD、卫星船站10、在A4航区播发航行警告主要靠（）实现A、INMARSA TB、MF/NBDPC、NA VTEXD、HF/NBDP11、下列哪一项不属于GMDSS中的新技术（）：A、MORSEB、DSCC、EGCD、NA VTEX.12、中波在白天传播的主要方式是（）。

A.天波传播B.地波传播C.空间波传播D.天波与地波传播13、在A4航区播发航行警告主要靠（）实现A、INMARSA TB、MF/NBDPC、NA VTEXD、HF/NBDP14、下列哪一项不属于GMDSS中的新技术（）：A、MORSEB、DSCC、EGCD、NA VTEX.15、GMDSS系统由（）个分系统组成。

A、4B、3C、2D、116、下面那一种系统不属于GMDSS的系统（）：A、INMARSAT—C B 、GPS C、SART D、MSI播发系统17、在A4海区，高频是唯一的远距离通信手段，下列哪一个不是远距离通信业务使用的频率（）：A、4207.5kHzB、6312kHzC、2187.5kHzD、8414.5kHz18、航行于( )海区的船站不能用INMARSAT系统完成通信。

GMDSS考试题：通信英语_单选题

1. What does ITU stand for? A. the International Telephone Union B. the International Telecommunication Union C. the International Telecommunication Unit D. the International Telex Unit 2. You can get chief officer ____it. A.do B. to do C.doing D.done
A
14. From the ship owners’point of view,_________ is the most important advantage INMARSAT providing with. A. business opportunity B. good-quality radiotelephone conversations C. telex service D. both b and c A 15. For ships equipped with an SES, it is_______ and ________for the operator to send a distress alert . A. easy/reliable B. simple/difficult C. stable /compulsory D. cheap/stow 16. Exchange of answerbacks acts a confirmation that the messages_________at the destination. A. have received B. have been received C. are received D. are being received

GMDSS通信英语完整题库

第一部英语听力习题1.Utopia Forward Station. This is Utopia Bridge. Single up forward to head line and breastline.Utopia船首台，我是驾驶台，请单绑，只剩头缆和横缆。

2.Utopia Aft Station. This is Utopia Bridge. Single up aft to breast line and stern buoy line.Utopia船尾台，我是船首台，请单绑，只剩横缆和尾浮筒系缆。

3.Utopia Aft Station. Take tug’s towing line to capstan then make fast on starboard quarter.Utopia船尾台，请把拖轮拖缆带上绞缆机并在右舿挽牢。

4.Oredock Pilot. This is Huanghe. My draught forward 10.2m, aft 11.0m, fresh waterallowance 200 millimeters.Oredock引航员，我是黄河轮，我船首吃水为10，2米，尾吃水为11米，淡水限额为200毫米5.Gargantua. This is Utopia. Visibility is expected to decrease to 200m in four hours.Gargantua，我是Utopia，预计四小时后能见度将下降到200米。

6.Euphoria. This is Red Sea. Visibility at Diexieville is 500 meters. It is expected to increaseto 1500 meters in the next two hours.Euphoria，我是Red Sea，在Diexieville处的能见度为500米，预计两小时后将增加到1500米。

GMDSS通信英语练习一三副考试必备

GMDSS通信英语练习一三副考试必备GMDSS英语阅读练习一、缩略语1、GMDSSA:Global Maritime Distress and Safety System 全球海上遇险与安全系统B:Global Maritime Distress and SafeSystem 全球海上遇险与安全系统C:Global Maritine Distress and Safety System 全球海上遇险与安全系统D:Global Maritime Distress and Safety System 全球海上遇险系统2、INMARSATA:International Mobile Satellite Organization 国际海事卫星组织B:International Maritime Satellite Organization 国际移动卫星组织C:International Maritime Satellite Organization 国家海事卫星组织D:International Maritime Satellite Organization 国际海事卫星组织3、PORA:Pacific Ocean Region 大西洋区B:Pacific Ocean Region 太平洋区C:Pacific Ocean Region 印度洋区D:Pacific Ocean Region 北冰洋区4、DSCA:Digital Select Call 数字选择性呼叫B:Digital Search Call 数字选择性呼叫C:Digital Selective Call 数字选择性呼叫D:Digital Searching Call 数字选择性呼叫5、MSIA:Maritime Safety Information 海上安全信息B:Mobile Safety Information 海上安全信息C:Maritime Safe Information 海上安全信息D:Maritime Signe Information 海上安全信息二、单选题1、Which of the following equipments on board is for the COSPAS-SARSAT system?A:DSCB:NAVTEXC:VHFD:EPIRB2、Please choose the INMARSAT-C NCS ID of the W-AOR:A:044B:001C:211D:1443、Which service does not the EGC system have？A:Safety NETB:Fleet NETC:SARTD:Sending MSI4、The VHF CH70 could be used to send ______:A:FAXB:DSCC:NBDPD:SSB5、In each NAVTEX message there is a technical code (B1B2B3B4):which character is the station identification ?A:B1B:B2C:B3D:B3B46、The following radio communication systems are used in GMDSS except the INMARSAT system:A:VHFB:VHF MF and HF terrestrial systemsC:the COSPAS-ASRSAT systemD:the FLAG SIGNAL systems7、Which equipment is required to be carried in the all sea areas ?A:VHFB:MFC:HFD:SES8、Where is the INMARSAT’S headquarters?A:ChinaB:The USAC:the United KingdomD:Canada9、The Maritime safety information contains _________:A:distress messageB:Urgency messageC:Distress alertD:Navigational and meteorological warnings10、Both the satellite communication and terrestrial communications will _________:A:not be used in the GMDSSB:be used only for general communicationsC:be replaced by MorseD:be used in the GMDSS11、If we pass this test it may be possible for us to obtainA:The First-class Radioelectronic CertificateＢ:The Second-class Radioelectronic CertificateＣ:The General Operator’s CertificateD:The Restricted Operator’s Certificate12、Which of the following statement is correct?A:2182 KHz is a carrier frequency used for distress and safety communications using radio telegraphy which class of emission is A1AB:2187:5 KHz is a carrier frequency used for distress and safetycalls using digital selective calling:C:2187:5 KHz is a carrier frequency used for distress and safety calls using narrow-band-direct-printing:D:2182 KHz is a carrier frequency used for distress and safety traffic using narrow band direct printing:13、There are VHF equipments and either a satellite EPIRB or a VHF EPIRB on board according to the equipment carriage requirement:Which sea area does the ship sail?A:A1B:A2C:A3D:A414、Which of the following description of usage is suitable for 2174:5KHz frequency?A:MSIB:NBDPC:DSCD:RT15、Which of the following description about Sea Area A3 is correct?A:an area within the radiotelephone coverage of at least one VHF coast station and one MF coast stationB:an area, including Sea Area A1 and A2, within the coverage of an INMARSAT geostationary satellite.C:An area, excluding Sea Area A1 and A2, within the coverage of an INMARSAT geostationary satellite.D:An area, excluding Sea Area A1 and A2, within the coverage of an COSPAS—SARSAT system.16、In the COSPAS-SARSAT system, there are _______types of beacons at present?A:3B:2C:1D:417、The medical message should be preceded by the word ________.A:OBSB:TMZC:MEDICOD:NW18、All the distress message should be preceded by ______.A:PAN PANB:SECURITEC:MAYDAYD:MEDICO19、What final place is a distress call/message routed to?A:CESB:NCSC:RCCD:MCC20、The date for entry into full effect for GMDSS is 1st February_______.。

GMDSS通信英语考卷

GMDSS通信英语考卷GMDSS通信英语模拟卷1. ______ will form the basis for distress alerting and safety calling.A. GMDSSB. EGCC. MSID. DSC2. In Area A1, the DSC frequency for distress alerting is ______.A. 156.8MHzB.156.3MHzC. 156.65MHzD. 156.525MHz3. Ship-to-ship distress alerting should be conducted by _______A. Inmarsat SESB. VHF/DSC or MF/DSCC. SART and VHF/DSCD. satellite EPIRB and VHF/DSC4. Maritime safety Information _______ international Safetynet service and NA VTEX service.A. consists ofB. can be receivedC. is transmitted byD. will be made on5. As each MSI message will have a unique identity, the printing of messages already received correctly is ____.A. automatically suppressedB. finished by the operatorC. manually suppressedD. done again6. If a ship is not fitted with and automatic position-fixing aid, such as GPS, its position should _____ in EGC receiver at regular interval.A. not keyB. be keyedC. not be keyedD. key7. Navigational and meteorological warnings, meteorological forecasts and other urgent safety related messages toshipping, including electronic chart correction data is _______.A. Safety serviceB. Urgent serviceC. distress alertingD. MSI8. There are _____ for ships to receive Safetynet messages.A. some chargeB. a few chargesC. more expensiveD. free charge9. The COSPAS-SARSAT 406KHz system was adopted as an element of the GMDSS by IMO in _____.A. 1980B. 1982C. 1984D. 198810. Which of the following statements is not a basic flaw of the terrestrial techniques.A. the need for specializationB. height of antennaC. congestion of communicationD. reception difficulties11. Traditional and terrestrial techniques ______.A. can overcome the basic flaws of the radio systemB. are useless todayC. now are out of dateD. are impossible to overcome the flaws in the existing radio system12. Which Inmarsat system applies S&F messaging?A. Inmarsat-AB. Inmarsat-BC. Inmarsat-CD. Inmarsat-F13. The Inmarsat system is open for use by ______ countries on a non-discriminatory basis.A. someB. lots ofC. manyD. all14. Sea Area A2 is an area within the coverage of at least one ______.A. VHF coast stationB. MF coast stationC. satelliteD. RCC15. The GMDSS must combine all various subsystems. Because _______.A. they all have different limitations with respect to coverageB. they all have different limitations in the technology they useC. different systems apply to different shipsD. all of above16. when receiving a distress alert, the SAR authorities ashore and the ships in the vicinity of the ship in distress will _______ in a coordinated search and rescue operation with the minimum delay.A. assistB. send a rescue vesselC. search the distress areaD. reach the distress position at once17. Ships equipped with Inmarsat SES send distress alerts both ______ and ______.A. quick and goodB. convenient and certainC. easily and simplyD. important and difficult18. Distress alert sent by RCC through CES or COAST STA TION is ______ alert.A. ship-to-shoreB. ship-to –shipC. shore-to-shipD. A,B,C are all correct19. For SAR operations, it should be possible to transmit messages in _____ directions.A. oneB. doubleC. bothD. four20. On-scene communications are between the _______.A. ship stations and the coast stationsB.SAR party and the ship in distressC. RCC and SAR partiesD. ship in distress and the SAR authorities ashore21. Why do some stations keep silence?A. because they are not engaged in the distress trafficB. they will affect the transmission of the distress trafficC. the powers of these stations are very weakD. they are not in charge of search and rescue22. A SART will provide the main means for _____ a survival craft in the system.A. sendingB. launchingC. locatingD. leaving23. The FEC mode is for _____ from _____ station to two or more other stations when availableA. receiving messages/one stationB. transmission/one coast station or shipC. communicating/one shipD. contacting/other24. It is preferable for ships lying ______ to receive MSI to ensure safe navigation.A. both at sea and in portB. in international watersC. at the anchorageD. in narrow channel25. In the GMDSS, Maritime Safety Information broadcast will be made on two dedicated systems providingnear-continuous automated reception on board ships, they are ______.A. INMARSAT SafetyNET service and NA VTEXB. SafetyNet service and COSPSA-SARSATC. DSC system and Navigation Warning ServiceD.MF/HF radiotelephone with NBDP and EGC Service26. WWNWS broadcasts ____ kinds of navigational warnings by means of radio for mariners.A. fourB. threeC. severalD. a lot of27. The concept of NA VTEX is of a _____ system for the broadcast and receipt of MSI.A. search and rescueB. safeC. total co-ordinatedD. hydrographic28. The NA VTEX receiver can be mounted on _______.A. on the bridgeB. in the coast stationC. on the forecastleD. on starboard side29. The distance between the two NA VTEX stations with the same B1 character should be exceed ______ nautical miles.A. 240B. 400C. 450D. 80030. The service uses a single frequency with transmissionsfrom nominated stations within each NA VREEA being arranged on a time-sharing basis ______.A. to remove other transmissionB. to establish contactC. to avoid interference between vesselsD. to eliminate mutual interference31. The receiving stations can use the B2 character to _____ different classes of messages.A. identifyB. correctC. rejectD. print out32. NA VTEX co-ordinators control messages transmitted by each station according to_____.A. the information contained in each messageB. the geographical coverage requiredC. transmitted identificationD. A and B are right33. In the communication of INMARSAT, _______ communication has the absolute priority over all other transmissions.A. routineB. distressC. urgencyD. security34. In addition to meeting the requirement of Sea area A1, every ship engaged on voyage in Sea area A2 shall be provided with ______.A. MF radio installation with DSCB. SESC. MF/HF radio telephone installationD. 2187.5 KHz watch receiver35. A radio link between a transmitting earth station and a receiving earth station through one satellite is named a ____.A. radio linkB. space segmentC. satellite linkD. upper link36. Mariners should pay much attention in the overlapped area owing to ______.A. complicated circumstancesB. changeable atmospheric pressureC. large density of trafficD. some strong signals from unwanted satellites37. The position of the INMARSAT satellite over the Atlantic Ocean Region (E) is _______.A. 180E above the equatorB. 64.5E over the IORC. 15.5W along the straight lineD. 54W above the equator38. The maritime access code for the AOR (W) is _____ INMARSAT-B telex service.A. 581B. 582C. 583D. 58439. The Inmarsat SES operator can choose the most suitable CES according to ______.A. his service and positionB. time and courseC. tide and speedD. type of his ship40. A mobile earth station in the maritime mobile-satellite service, which is located on board ship, is called _____.A. an LESB. an SES C, a ship station D. a land mobile station41. The other part of an SES is communication electronics and controllers, which is referred to as BDE, because this part is located _______.A. high up on the vesselB. inside the vesselC. exterior the vesselD. above deck42. In Inmarsat-B, “Priority2” means _____ communication.A. routineB. distressC. urgencyD. safety43. The satellites in the INMARSAT system virtually cover the globe as far as about 75______ the polar regions.A. together withB. besides C, including D. except44. For COSPAS-SARSAT system, _____ process the distress signal from EPIRB to determine its position and identity.A. COSPAS-SARSATB. LUTC. SpacecraftD. Satellite SAR instrument45. In the COSPAS-SARSAT system distress signals are proceeded by _____ and the resulting data are forwarded to______ through ______ communication network.A. MCC/LUT/RCCB.LUT/MCC/ RCCC. LUT/RCC/MCCD. LUT/RCC/LUT46. Operating method in which transmission is possible simultaneously in both directions of a communication channel is called ______.A. Duplex OperationB. Simplex OperationC. Auto-OperationD. two-way communication47. A EPIRB beacon operating in ___ frequency band through the COPSA T-SARSAT system is located on board a ship.A. 406MHZB. 121.5MHZC. 518KHZD. A+B48. In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous ______ alert.A. MF/HFB. SARTC. EPIRBD. any of A.B.C49. Chapter IV of SOLAS applies to all ships to which the present regulations apply and to cargo ships of _____ and upwards.A. 500 GTB. 3000 GTC. 1500 GTD. 300 GT50. Every radio installation shall be protected against _____, extremes of temperature and other adverse invironmental conditions.A. coated oilB. dangerous cargoC. harmful effects of waterD. noxious atmosphere51. a distinct humming should be hear on the loudspeaker.A、When the distress alarm is soundedB、When the emergency communication receiver is tuned onC、Whenever an emergency call is transmittedD、When a distress message is received52. can receive MS1 sent by coast stationA、A NA VTEX recevierB、An EGC recevierC、MF/HF radio telephoneD、HF radio telephone with NBDP53. The broadcast of MSI will be made _____.A、continuouslyB、on terrestrial communication systemC、on satellite communication systemD、both B and C54. Each NCS works as a type of , assisting controlling and monitoring telex and telephone network as quickly as possibleA、switch operatorB、communication gatewayC、national operatorD、on-scene commander55. International NA VTEX service isA、a terrestrial MF systemB、a satellite communication systemC、a land HF radio systemD、a coastal VHF system56. In the case of a ship in distress , the need exists to createa temporary geographic area to _____ locating potential assisting ships.A. increaseB. improveC. facilitateD. develop57. There is actually an overlap of _____ ocean regions somewhere in Western European Waters.A. as many as threeB. more than twoC. less than twoD. up to four58. What is COSPAS-SARSAT ?A.an international satellite system for improving communications in polar regionsB.an international satellite system using a number of polar-orbiting satellitesC.primary used for search and rescueD. B and C59. In GMDSS, any kind of EPIRB can have the abilities to keep water proof for _____in 10m deep.A. 2minB. 5minC. 10minD. 15min60. _____ means the finding of ships, aircraft, units or persons in distress.A. shore-based radar assistanceB. locatingC. search and rescueD. salvage61. Ships of 10000 tons gross tonnage and upwards shall be fitted with two _____, each capable of being operated independently of the other.A. radio equipmentsB. radar installationC. lift-saving appliancesD. EPIRBs62. At least _____ two-way VHF radiotelephone apparatus shall be provided on every passenger ship.A. oneB. twoC. threeD. four63. According to the basic concept to the GMDSS , distress alerting can be sent by _____ to SAR authorities ashore or ships in vicinity of a distress incident.A. either satellite or terrestrial communicationB. only satellite communicationC. only terrestrial communicationD. VHF DSC or SES64. Any radio communication service which is used for the safeguarding of human life and property whetherpermanently or temporarily, is a ______ service.A. publicB. radioC. safetyD. emergency radio65. The NCS of INMARSAT-C system in IOR is ____A. GoonhillyB. SentosaC. ThermopylaeD. Yamaguchi66. The second letter S in SSB is the abbreviation for the word ______..A. SafetyB. SideC. ShipyardD. Single67. A person _____ in spite of being in an extremely dangerous situation is a survivor.A. who is still aliveB. who is safetyC. who is healthyD. who continues to live68. We are sure ______ in the near future.A. that our seafarers can speak English fluentlyB. that our seafarers can read English adequatelyC. that our seafarers can listen to English conversation without any problemD. A,B,C, are all required according to STCW convention69. The fishing vessel _____ the distress area until the assistance vessel arrived.A. leaveB. leftC. has leftD. didn’t leave70. A sailor on board _____ from appendicitis and required operation immediately.A. was sufferingB. is sufferingC. has sufferedD. has been suffering71. In general, there are two parts in an SES, One of these is antenna equipment also referred to as _____A. BDEB. UDEC. AEPD. ADE72. A SART can be fixed on ______.A. a mother shipB. a lifeboatC. a life craftD. all of A,B,C73. What part of the Inmarsat will the SES get access to if the commissioning is successful?A. The SESB. The space segmentC. Any CESD. The CES decided by the applicant74. The GMDSS is a world-wide communication network combining ______ with ______.A. satellite /terrestrial systemB. INMAARSA T/COSPAS-SARSATC. SART / EPIRBD. geostationary/polar-orbiting satellites75. Radio communication______ for many years and helps to save tens of thousands of lives.A. has been usedB. have been usedC. has used D have used76. ____ is a unit responsible for promoting efficient organization of SAR services and for coordinating the conduct of SAR operations with a SAR region.A. NCCB. LUTC. RCCD. NSC77. What is the emission designation for VHF-FM?____A. F3CB. J2BC. J3ED. G3E78. Which system has the least effective radius of operation?A. HF NBDPB. MF NBDPC. NA VTEXD. VHF DSC79. In abbreviation FEC, the letter E means____A. effectB. eastC. errorD. erase80. Equipment shall be so designed that the main units canbe ____ readily, without elaborate recalibration orreadjustment.A. requiredB. requestC. replacedD. readjustment81. SAR co-ordination communications are between the ____A. RCC and ships in distressB. assisting ships and ships in distressC. RCC and OSCD. OSC and assisting ships82. For ships equipped with an SES, it is ____ and___ for the operator to send a distress alert.A. difficult/cheapB. easy/reliableC. stable/compulsoryD. easy/expensive83. EPIRB batteries must be clearly ____ with their expiry date, the serial number and the identification code.A. notedB. writtenC. markedD. notified84. Equipment performance and personnel training must be in compliance with the requirements of ____A. STCW 95B. SOLAS 88C. GMDSSD. IMO85. In all areas of operation the ____ should be provided.A. MSIB. continuous availability of alertC. safety net businessD. shipping business communication86. ____ has the right to impose silence on stations which interfere with distress traffic.A. CESB. SESC. OSCD. RCC87. In NA VTEX service, local warnings are normally broadcast on ____A. NA VTEX serviceB. SafetyNET serviceC. VHF voice onlyD. MF/HF TEL88. When activated in a distress situation, SART should provide survivors ____, when it is interrogated by a radar.A. 12 blipB. special radar imagineC. visual and audible indicationD. straight line89. I’d like to apply ____ its extension.A. toB. withC. onD. for90. Utopia asked for tug assistance because she ______.A. run agroundB. is running agroundC. was agroundD. is aground91. Stations are grouped by countries arranged in the _____order of their country symbols.A. alphabeticalB. figureC. name of stationsD. series92. The first communication satellite was used for the purpose of ______ .A. taking the place of the radio systemB. introducing a new life-saving systemC. saving the vessels in distressD. improving the communication on land93. ______ is the united nations agency responsible for the Radio Regulations among other things.A. ITUB. IMOC. MSCD. WMO94. A station in the mobile service the emissions of which are intended to facilitate search and rescue operations is ____ .A. Ship StationB. LESC. EPIRB StationD. NCS95. Every ship constructed on or after ______ shall comply with all the applicable requirements of this chapter.A. 1 February 1995B.1 February 1992C. 1 July 1997D. 1 February 199996. Misuse of ship radio frequencies is ______ and must not take place .A. forbiddenB. allowedC. illegalD. unusual97. In GMDSS, the distress and safety message will be picked up by ______ if it is sent using HF, INMARSAT or theCOSPAS-SARSAT system.A. shipsB. shore stationsC. both ships and shore stationsD. either ships or shore stations98. Category B2=f is to be used only for broadcasting ______ to the pilot service.A. weather reportB. details of vesselC. temporary alterationsD. urgent information99. Before GMDSS, if the radio officer on board is serious ill, ______.A. someone else will take his placeB. the captain will take charge of his workC. nobody will be capable of doing his workD. anyone else will use the radio equipment100. What is the most expensive per-minute call made via INMARSAT Standard-B? ____A. ship to shore voiceB. ship to shore telexC. ship to ship voiceD. all call cost the same amount。

GMDSS通信英语习题集

第一部分单项选择题第一章 GMDSS通信基础知识001. Which of the following is a required GMDSS function?A. Bridge-to-bridge communications.B. Reception of weather map facsimile broadcasts.C. Both of these.D. None of these.002. Which of the following is a required GMDSS function?A. Transmit and receive location signals.B. Transmit and receive general communications.C. Both of these.D. None of these.003. GMDS is required for which of the followings?A. All vessels capable of international voyages.B. SOLAS Convention ships of 300 gross tonnage or more.C. Vessels operating outside of the range of VHF coastal radio stations.D. Coastal vessels of less than 300 gross tons.004. What is the fundamental concept of the GMDSS?A. It is intended to automate and improve existing digital selective calling procedures and techniques.B. It is intended to automate and improve emergency communications in the maritime industry.C. It is intended to provide more effective but lower cost commercial communications.D. It is intended to provide compulsory vessels with a collision avoidance system when they areoperating in waters that are also occupied by non-compulsory vessels.005. What equipment can be used to receive Maritime Safety Information?A. HF NBDP.B. NA VTESC. EGC receiver.D. All of these.006. Which statement is false regarding the radio operator requirements for a GMDSS-equipment ship station?A. One of the qualified GMDSS operators must be designated to have primary responsibility for radiocommunications during distress incidents.B. A qualified GMDSS operator, and a qualified backup, must be designated to perform distress,urgency and safety communications.C. Maintaining a record of all incidents connected with the radio communication service which appearto be of importance to safety of life at sea is not required.D. While at sea, all adjustments or radio installations, servicing or maintenance of such installationswhich may affect the proper operation of the GMDSS station must be performed by, or under the supervision of, a qualified GMDSS operator.007. Which statement is false regarding the maintenance of GMDSS equipment at sea?A. The GMDSS operator may not be the person designated to have primary responsibility for radiocommunications during distress incidents.B. Ships must carry at least one person who qualifies as a GMDSS maintainer for the maintenance andrepair of equipment if the at sea maintenance option is selected.C. All at sea maintenance and repairs must be performed by, or under the supervision of a personholding a GMDSS First/Second Class Radio Electronic Certificate.D. The GMDSS maintainer may be the person responsible for ensuring that the watches are properlymaintained and that the proper guard channels and the vessel’s position are entered in the DSC equipment.008. What is defined as an area outside sea areas A1, A2 and A3?A. AOR-E.B. AOR-W.C. Coastal and inland waters.D. A4.009. Which radio equipment is not necessary for the ships sailing in the sea area A1?A. NA VTES receiver.B. VHF EPIRB.C. 406MHz EPIRBD. VHF DSC.010. Which of the following is a functional or carriage requirement for compulsory vessels?A. A compulsory vessel must satisfy certain equipment carriage requirements that are determined bywhere the vessel sails.B. A compulsory vessel must carry licensed GMDSS operators, the number should be determined bythe associated administration.C. A compulsory vessel must be bale to transmit and respond to distress alerts.D. All of these.011. Which radio equipment is not necessary for the ships sailing in the sea area A1?A. NA VTES receiver.B. EPIRB.C. HF DSCD. VHF DSC..012. Which radio equipment is not necessary for the ships sailing in the sea area A2?A. MF DSC.B. VHF radio telephone.C. VHF DSCD. VHF EPIRB..013. Which radio equipment is not necessary for the ships sailing in the sea area A3?A. GSM radiotelephone.B. MF DSC.C. Enhanced Group Calling receiver.D. Satellite EPIRB.014. What is the approximate range of MF radio waves during the day time?A. 30 nautical miles.B. 600 nautical miles.C. 150 nautical miles.D. 1200 nautical miles.015. What is the approximate range of VHF radio waves during the day time?A. 30 nautical miles.B. 600 nautical miles.C. 150 nautical miles.D. 1200 nautical miles.016. What is the wavelength, if the frequency is 6MHz?A. 180m.B. 18m.C. 50m.D. 500m.017. Which equation shows right ratio between the frequency (f) and the wavelength (Lambda) of radio waves?A. f=Lambda/CB. f=C x LambdaC. f=C/LambdaD. f=C x 6.28 x Lambda018. Which system is often used to provide accurate vessel position information to the GMDSS equipment?A. COSPAS-SARSATB. GPSC. EPIRBD. INMSRSAT-F019. What is defined as the area within the radiotelephone coverage area of at least one VHF coast station in which continuous DSC alerting is available as defined by the IMO regulation for GMDSS?A. Ocean Area Regions AOR-E, AOR-W, POR or IORB. Sea Area A2C. Sea Area A1D. Coastal and Inland Waters.020. What is “Protocol”?A. NMEA protocol is often selected by engineer onboard.B. A defined set of communications standards which lay down the parameters to which all users mustabide.C. Protocols in general use are X.25 and X.400D. All of these021. Which of the following is true regarding the definition of the sea areas?A. It is assured that INMARSAT services are available in sea area A3.B. It is assured that INMARSAT services are available in sea area A1.C. It is assured that INMARSAT services are available in sea area A2.D. It is assured that INMARSAT services are available in sea area A4.022. In which sea areas(s), INMARSAT service are available?A. Sea Area A3 only.B. Sea Area A1, A2 and A3C. Sea Area A3 is included.D. Excluding sea area A1023. What is defined as and area, excluding sea areas A1 and A2, within the coverage of an INMARSAT geostationary satellite in which continuous alerting is available?A. Ocean Area Regions AOR-E, AOR-W, POR or IORB. Sea Area A3C. Sea Area A4D. Coastal and Inland Waters.024. Which channel is designated for VHF Digital Selective Calling?A. Channel 70B. Channel 06C. Channel 13D. Channel 16025. What is defined as an area, excluding sea area A1, within the radiotelephone coverage area of at least one MF coast station, in which continuous DSC alerting is available as defined by the IMO?A. Ocean Area Regions AOR-E, AOR-W, POR or IORB. Sea Area A4C. Sea Area A3D. Sea Area A2026. What is the minimum requirement of a GMDSS operator?A. GMDS operator license.B. Third officer license.C. General Radiotelephone Operator license and Radar Endorsement.D. General Radiotelephone license or First or Second Class Radiotelegraph license with GMDSSRadio Officer’s endorsement.027. Which is not a functional requirement of GMDSS MF/HF equipment?A. Radiotelephony on 2152 KHz.B. Transmitting distress signals by DSC on 2187.5 KHz.C. Receiving and Watch keeping by DSC on 2187.5 KHz.D. Transmitting and receiving by NBDP with MF.028. Which statement is false regarding a GMDSS-equipped ship?A. A conditional or partial exemption may be granted, in exceptional circumstances, for a singlevoyage outside the sea area for which the vessel is equipped.B. ships must have the required equipment inspected at least once every 12 months.C. Ships must carry at least three persons holding GMDSS operator’s license for distress and safetyradio communications purposes.D. The regulations apply to all passenger ships regardless of size and cargo ships of 300 gross tons andupwards.029. Which statement is false regarding a GMDSS-equipped ship?A. A conditional or partial exemption may be granted, in exceptional circumstances, for a singlevoyage outside the sea area for which the vessel is equipped.B. ships must have the required equipment inspected at least once every five years.C. The regulations apply to all passenger ships regardless of size and cargo ships of 300 gross tons andupwards.D. Ships must carry person(s) holding a GMDSS operator’s license for distress and safety radiocommunications purposes.030. What is the term which refers to the supply of electrical energy required to supply radio installations on every ship for the purpose of conducting distress and safety radio communications in the event of failure of the ship’s main and emergency sources of electrical power?A. Emergency power.B. Reserve source of energy.C. Ship’s emergency diesel generator.D. Ship’s standby generator.031. GMDSS-equipped ships will be required to perform which of the following communications functions?A. Distress alerting and maritime safety information.B. Search and Rescue coordination and on-scene communications.C. Bridge-to-bridge and general radio communications.D. All of these032. A vertical antenna (whip) has a radiation pattern best described by which statement?A. A Figure eightB. A cardioids.C. A circle.D. An ellipse.033. Under GMDSS, the proper functioning of the DSC facilities shall be tested periodically without radiation of signals, by use of the means provided by equipment. What is the period?A. Weekly.B. Annually, by a representative of the MSA.C. DailyD. Monthly.34. Under GMDSS, the reserve source of energy is not a battery (for example, a motor generator) the reserve source of energy must be tested at what minimum intervals?A. Weekly.B. Annually, by a representative of the MSA.C. At the annual SOLAS inspection.D. Monthly.035. Who can make the determination to suspend AIS continuous listening watch?A. The operator, when the vessel is no longer operating in open sea.B. The Master, when determining that armed robbery may occur.C. An operator when it is determined that the noise becomes annoying to personnel on the bridge.D. Anyone, if it is determined that the noise interferes with listening on 97.5MHz FM transmissions. 036. Which of the following documents are required by GMDSS for vessels on international voyages?A. A copy of the IMO master plan of shore-based facilities.B. Station logs.C. ITU Radio Regulations.D. All of these.037. What equipment is used in or near the survival craft?A. NA VTEXB. Fathometer.C. COSPAS-SARSATD. EPIRB038. Which statement is false regarding a GMDSS-equipped ship?A. A conditional or partial exemption may not be granted, even in exceptional circumstances, for asingle voyage outside the sea area for which the vessel is equipped.B. ships must have the required equipment inspected at least once every 12 months.C. The regulations apply to all passenger ships regardless of size and cargo ships of 300 gross tons andupwards.D. Ships must carry person(s) holding a GMDSS operator’s license for distress and safety radiocommunications purposes.039. Every A3 ship, while at sea, shall maintain a continuous watch:A. On VHF DSC channel 70B. On the distress and safety DSC frequency 2,187.5 KHz and 8,414.5 KHz and also on at least one ofthe distress and safety DSC frequencies 4,207.5 KHz, 6,312 KHz, 12,577 KHz or 16,804.5 KHz, appropriate to the time of day and the geographical position of the ship.C. For satellite shore-to-ship distress alerts.D. All of these.040. What statement is generally correct regarding the maintenance requirements for ships under GMDSS?A. Redundancy of functions of certain equipment will partially meet this requirement.B. On-board maintenance provided by a person holding a Second Class Electronic Certificate licensewill partially meet the requirements.C. shore based maintenance and scheduled tests and inspections will partially meet this requirement.D. All of these.041. What is the primary purpose of the GMDSS?A. Environmental protection.B. A common international communications system for all shipping.C. Automate and improve emergency communications for the world’s shipping industry.D. Effective and inexpensive communications.042. What is the minimum operation time of reserve source of energy on ships without an emergency energy source?A. 1 hourB. 6 hoursC. 12 hoursD. 24 hours043. What is the minimum operation time of reserve source of energy on ships with an emergency energy source?A. 1 hourB. 6 hoursC. 12 hoursD. 24 hours044. Vessel operating in which sea area(s) are required to carry either INMARSAT or HF equipment or a combination thereof under GMDSS?A. All sea areas.B. A3.C. A4.D. A3 and A4045. Which system is most likely to be affected by atmospheric disturbances?A. VHF DSCB. INMARSAT Standard-CC. MF/HF radiotelephony.D. Safety NET046. Which system is least likely to be affected by atmospheric disturbances?A. NA VTESB. MF NBDP.C. SESD. HF NBDP047. Which of the following systems is most likely to be subject to fading or static interference?A. HF NBDPB. INMARSATC. Digital Selective Calling on channel 70.D. VHF ARQ048. Which system has the least effective radius of operation?A. HF SITORB. MF NBDPC. VHF DSCD. NA TTEX049. What is the basic concept of GMDSS?A. Search and rescue authorities shore can be alerted to a distress situation.B. shipping in the immediate vicinity of a ship in distress will be rapidly alerted.C. Shore-side authorities and vessels can assist in a coordinated SAR operation with minimum delay.D. All of these.050. A ship operating in sea area A1 must have the following provisions of maintenance:A. Shore maintenance.B. Duplication of equipment.C. At Sea Maintenance.D. Any one of these.051. A ship operating in sea area A3 must have the following provisions for maintenance:A. Duplication of Equipment.B. Shore Maintenance.C. At Sea Maintenance.D. Any two of these.052. What is the minimum operator license required to perform or supervise the performance of at sea maintenance which may affect the proper operation of the GMDSS station in sea area A3?A. Second Class Radio Electronic CertificateB. Restricted Operator’s Certificate.C. First Class Radio Electronic Certificate.D. GMDSS General Operator’s Certificate.053. What is the minimum operator license required to perform or supervise the performance of at sea maintenance which may affect the proper operation of the GMDSS station in sea area A1?A. Restricted Operator’s Certificate.B. First Class Radio Electronic Certificate.C. Second Class Radio Electronic CertificateD. GMDSS General Operator’s Certificate.054. What is the minimum operator license required to perform or supervise the performance of at sea maintenance which may affect the proper operation of the GMDSS station in sea area A2?A. Restricted Operator’s Certificate.B. First Class Radio Electronic Certificate.C. Second Class Radio Electronic CertificateD. GMDSS General Operator’s Certificate.055. What is the minimum operator license required to perform or supervise the performance of at sea maintenance which may affect the proper operation of the GMDSS station in sea area A4?A. Restricted Operator’s Certificate.B. Second Class Radio Electronic CertificateC. First Class Radio Electronic Certificate.D. GMDSS General Operator’s Certificate.056. How many pieces of portable GMDSS VHF transceivers must a passenger ship of 400 tons gross tonnage be provided with?A. 3B. 1C. 2D. 6057. How many pieces of portable GMDSS VHF transceivers must a cargo ship of 400 tons gross tonnage be provided with?A. 1B. 3C. 2D. 6058. How many pieces of portable GMDSS VHF transceivers must a passenger ship of 1700 tons gross tonnage be provided with?A. 1B. 2C. 3D. 6059. How many pieces of portable GMDSS VHF transceivers must a cargo ship of 1700 tons gross tonnage be provided with?A. 1B. 2C. 3D. 6060. Where are the operational details of NA VTES stations to be found?A. ITU List of ship Stations.B. Admiralty Lists of Radio Signals, Volume IIIC. IEC Publication 945, Marine Navigational Equipment.D. Frequency Allocation Tables.061. Where are the operational details of stations transmitting maritime safety information to be found?A. ITU List of ship Stations.B. Admiralty Lists of Radio Signals, Volume IIIC. IEC Publication 945, Marine Navigational Equipment.D. Frequency Allocation Tables.062. Where are the operational details of the stations for timing signals?A. Admiralty Lists of Radio Signals, V olume IB. Admiralty Lists of Radio Signals, Volume IIC. Admiralty Lists of Radio Signals, V olume IIID. Admiralty Lists of Radio Signals, V olume IV063. Where are the operational details of the stations for public correspondence?A. Admiralty Lists of Radio Signals, V olume IB. Admiralty Lists of Radio Signals, Volume IIC. Admiralty Lists of Radio Signals, Volume IIID. Admiralty Lists of Radio Signals, V olume IV064. Which is not vessel or personnel requirement of GMDSS?A. Regular equipment upgrading standards requirement.B. Licensed radio operators.C. Equipment carriage requirements.D. Distress alerting and response.065. Which statement is false regarding the maintenance requirement for GMDSS equipped vessels?A. On ships engaged on voyages in sea area A1 and A2, maintenance availability must be assured byduplication of equipment, shore-based maintenance, or at-sea maintenance capability or a combination of these.B. On ships engaged on voyages in sea areas A2 and A3, maintenance availability must be ensured byusing a combination of as least two choices between duplication of equipment, shore-based maintenance, or at-sea maintenance capability.C. if the shore-based maintenance method is used, maintenance services must be completed andperformance verified and noted in the ship’s record before departure from the first port of call entered after any failure occurs.D. All at-sea maintenance and repairs must be performed by, or under the supervision of a personholding a suitable GMDSS license.066. What are the vessel equipment and personnel requirements of GMDSS?A. Licensed radio operators.B. Equipment carriage requirements.C, Distress alerting and response.D. All of these067. What is the minimum GMDSS personnel requirement of Non-GMDSS ships operating in sea area A1?A. Restricted Operator’s Certificate.B. Second Class Radio Electronic Certificate.C. First Class Radio Electronic Certificate.D. None GMDSS requirements are compelled.068. What is the minimum personnel requirement of GMDSS ships trading in sea area A1?A. Restricted Operator’s Certificate.B. General Operator’s CertificateC. Second Class Radio Electronic Certificate.D. First Class Radio Electronic Certificate.069. What is the minimum GMDSS personnel requirement of drill platforms operating in sea area A1?A. Restricted Operator’s Certificate.B. General Operator’s CertificateC. Second Class Radio Electronic Certificate.D. First Class Radio Electronic Certificate.070. What is the minimum personnel requirement of GMDSS ships trading in sea area A2?A. Restricted Operator’s Certificate.B. General Operator’s CertificateC. Second Class Radio Electronic Certificate.D. First Class Radio Electronic Certificate.071. What is the minimum personnel requirement of GMDSS drill platforms operating in sea area A2?A. Restricted Operator’s Certificate.B. Second Class Radio Electronic Certificate.C. General Operator’s CertificateD. First Class Radio Electronic Certificate.072. What is the minimum GMDSS personnel requirement of ship with At-sea Maintenance method operating in sea area A3?A. Restricted Operator’s Certificate.B. Second Class Radio Electronic Certificate.C. General Operator’s CertificateD. First Class Radio Electronic Certificate.073. What is the minimum GMDSS personnel requirement of ships with Duplication of Equipment method operating in sea area A3?A. Restricted Operator’s Certificate.B. Second Class Radio Electronic Certificate.C. General Operator’s CertificateD. First Class Radio Electronic Certificate.074. Which of the following regarding AAIC (accounting authority identification code) is false?A. The AAIC of vessels registered in China is HX08.B. The AAIC of vessels registered in China is CN03.C. It is a unique code assigned by the ITU to identify an accounting authority.D. It should be submitted to the operators ashore when ships are requesting services from CRS. 075. Which of the following regarding AUSREP is false?A. A vessel position-reporting system similar to AMVER.B. It is a compulsory system.C. It is operated by the Austrian Authorities.D. It is an active system which means when vessels send position overdue, search and rescue unitsashore will take action to connect with them.076. Which of the following regarding AMVER is false?A. A vessel position-reporting system operated by the United Kingdom.B. It can be taken port in by any merchant vessel of 1000grt or more on a voyage lasting longer than24 hours, to and from anywhere on the world.C. It is the abbreviation of Automated Mutual-assistance Vessel Rescue system.D. It is a ship reporting system in practice.077. Gold Franc (GF):A. A nominal currency used by LESs and accounting authorities to calculate communication chargesincurred by an MES. A fixed rate of exchange exists between the GF and the nominal currency the SDR: 1 SDR = 3.061 GF.B. It is a currency used in France.C. The coins are made of gold.D. The exchange rate between the GF and SDR is invariable.078. What is the minimum GMDSS personnel requirement of ships with Shore-based Maintenance method operating in sea area A3?A. Restricted Operator’s Certificate.B. General Operator’s CertificateC. Second Class Radio Electronic Certificate.D. First Class Radio Electronic Certificate.079. What is the minimum GMDSS personnel requirement of drill platforms with At-Sea Maintenance method operating in sea area A3?A. Restricted Operator’s Certificate.B. General Operator’s CertificateC. First Class Radio Electronic Certificate.D. Second Class Radio Electronic Certificate.080. What is the minimum GMDSS personnel requirement of drill platforms with Duplication of Equipment method operating in sea area A3?A. Restricted Operator’s Certificate.B. General Operator’s CertificateC. Second Class Radio Electronic Certificate.D. First Class Radio Electronic Certificate.081. What is the minimum GMDSS personnel requirement of drill platforms with At-Sea Maintenance method operating in sea area A4?A. Restricted Operator’s Certificate.B. General Operator’s CertificateC. Second Class Radio Electronic Certificate.D. First Class Radio Electronic Certificate.082. GMDSS is primarily a system based on:A. Ship-to-ship distress communication using MF or HF radiotelephony.B. VHF digital selective calling from ship to shore.C. Distress, urgency and safety communication carried out by the use of narrow-band direct printingtelegraphy.D. The linking of search and rescue authorities ashore with shipping in the immediate vicinity of aship in distress or in need of assistance.083. What is the minimum GMDSS personnel requirement of drill platforms with Shore-based Maintenance method operating in sea area A4?A. Restricted Operator’s Certificate.B. General Operator’s CertificateC. Second Class Radio Electronic Certificate.D. First Class Radio Electronic Certificate.084. What is the minimum GMDSS personnel requirement of drill platforms with Duplication of Equipment method operating in sea area A4?A. Restricted Operator’s Certificate.B. General Operator’s CertificateC. Second Class Radio Electronic Certificate.D. First Class Radio Electronic Certificate.085. Which statement is false regarding a vessel equipped with GMDSS equipment that remains in Sea Area A1 at all times?A. The vessel must be provided with a radio installation capable of initiating the transmission ofship-to-shore distress alerting from the position from which the ship is normally navigated.B. VHF DSC alerting may be the sole means of distress alerting.C. EPRIB may satisfy the equipment requirement.D. MF SSB with 2182 kHz automatic alarm generator may satisfy the equipment requirement.086. What is the total voltage and capacity of two 12 batteries coupled in series if each battery has capacity of 100 Ah?A. 12V 100Ah.B. 24V 100Ah.C. 12V 200Ah.D. 24V 200Ah087. Which statement is false regarding the GMDSS requirement for ship sources of energy?A. At all times while the vessel is at sea, a sufficient supply of electrical energy to operate the radioinstallations and charge any batteries which may be part of the reserve source of energy is required.B. All of these.C. The reserve sources of energy need to supply, INMARSAT-B/F, HF and MF radio installations atthe same time.D. An uninterruptible power supply or other means of ensuring a continuous supply of electricalpower to GMDSS equipment that could be affected by normal variations and interruptions of ship’s power is required.088 Which of the following service or maintenance functions may be performed by the holder of First Class Radio Electronic Certificates?A. Reset tripped circuit breakers or replace defective fuses.B. Routine battery maintenance if used as port of the GMDSS station.C. Any adjustments or maintenance which may affect the proper operation of the station.D. all of these089. Which of the following service or maintenance functions may be performed by the holder of Second Class Radio Electronic Certificates?A. Reset tripped circuit breakers or replace defective fuses.B. Routine battery maintenance if used as port of the GMDSS station.C. Any adjustments or maintenance which may affect the proper operation of the station.D. all of these090. Which of the following service or maintenance functions may not be performed by the holder of GMDSS General Operator’s Certificates?A. Any adjustments or maintenance which may affect the proper operation of the station.B. Replacement of consumable items such as paper, ribbons, etc.C. Reset tripped circuit breakers or replace defective fuses.D. Routine battery maintenance if used as part of the GMDSS station.091. Which of the following service or maintenance functions may not be performed by the holder of Restricted Operator’s Certificates?A. Reset tripped circuit breakers or replace defective fuses.B. Routine battery maintenance if used as part of the GMDSS station.C. Any adjustments or maintenance which may affect the proper operation of the stationD. Replacement of consumable items such as paper, ribbons, etc.092. What are the conditions, under GMDSS, whereby a ship is not allowed to depart from any port?A. The vessel is not capable of performing all required distress and safety functions.B. The vessel is carrying more than the required number of qualified GMDSS operators.C. The vessel has a temporary waiver o fits radio license and Safety Certificate.D. The vessel is not carry a GMDSS radio maintainer, but has provided for shore-side maintenance. 093. Which of the following areas would be considered Ocean Area A2?A. An area within coverage of INMARSAT geostationary satellites.B. An area within coverage of Medium Frequency (MF) coastal radio stations in which continuousDSC alerting is available.C. an area within coverage of VHF coast radio stations in which continuous DSC alerting is available.D. The extreme polar regions.。

1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。

GMDSS题库汉语部分第一部分：GMDSS系统概述1、GMDSS的首要功能是（）：A、日常通信B、播发海上安全信息C、驾驶台与驾驶台通信D、遇险船舶的可靠报警D2、下面那一项不属于GMDSS的功能（）：A、现场通信B、遇险报警C、常规通信D、船位报告D3、下面那一项不属于GMDSS的七大功能（）：A、现场通信B、搜救现场通信C、船队业务D、常规通信C4、下面那一种系统不属于GMDSS的系统（）：A、INMARSAT—C B 、GPS C、SART D、MSI播发系统B5、GMDSS中遇险报警指（）：A．船对岸的报警B、船对船的报警C、岸对船的报警D、A+B+CD6、GMDSS中的MSI的播发是通过（）来进行的：A、NA VTEX系统B、EGC系统C、高频电传方式D、A+B+CD7、船对船的遇险报警应使用（）设备：A、卫星EPIRB和VHF/EPIRBB、VHF/DSC和MF/DSCC、INMARSA T—B船站和SARTD、INMARSAT—B船站或C船站B8、GMDSS中的寻位是靠（）来完成的：A、GPSB、SART 和雷达C、EPIRBD、MF/VHF设备B9、GMDSS中，不能用以下（）设备接收气象信息：A、NA VTEXB、NBDPC、EGC接收机D、DSC设备D10、每艘船舶应配备SART（）台，双向手提式无线电话（）台：A、1/2B、2/3C、2/1D、3/2 BB11、遇险的现场通信常使用（）：A、HF设备的无线电话和电传B、INMARSAT船站的电话和电传C、MF/VHF的无线电话和电传D、VHF/DSCC12、GMDSS按航区划分为（）：A、16海区B、太平洋、大西洋、印度洋C、大西洋西区、大西洋东区、太平洋、印度洋D、4个海区D13、位于（）航区的船站可以利用INMARSAT系统进行通信：A、A1B、A2C、A3D、A4C14、IMO规定的：至少一个具有DSC功能的MF海岸电台的覆盖范围是（）海区：A、A1B、A2C、A3D、A4B15、在同一INMARSA T卫星覆盖区中的岸站数目不能超过（）个：A、5B、15C、25D、30B16、只有（）种船站采用模拟通信方式：A、INMARSAT—AB、INMARSA T—BC、INMARSAT—CD、INMARSAT—M A17、在INMARSA T系统中网络协调站的缩写为（）：A、CESB、NCSC、NCCD、LESB18、IMO规定的：至少一个具有DSC功能的VHF海岸电台的覆盖范围是（）海区：A、A1B、A2C、A3D、A4A19、GMDSS船载设备的基本配备是（）：A VHF无线电话，有CH70DSC功能的VHF和VHF/DSC值守机B 至少两台SART和EPIRB C、NA VTEX接收机，EGC设备D.A+B+CD20、A1航区船舶必须增配的设备是（）：A、用于常规通信的VHF电话设备B、MF/DSC值守机和MF/DSCC、可用VHF/EPIRB代替卫星EPIRBD、A+CD21、GMDSS中，对A1海区EPIRB有（）规定：A、必须配备406MH Z的EPIRBB、必须配备406MH Z的EPIRB或VHF/EPIRBC、必须配备406MH Z的EPIRB和VHF/EPIRBD、在VHF/EPIRB，406MHZ的EPIRB与1.6GHZEPIRB中任选一种示位标D22、GMDSS中规定，航行在A1+A2+A3+A4海区的船舶，其无线电设备增配方案包括（）：A、INMARSAT船站B、MF/HF电台C、MF电台和INMARSAT船站D、HF电台和INMARSA T船站B23、SOLAS公约对航行于A1或A2海区的船舶，无线电设备维修配备方案应采用（）：A、双套设备B、海上电子维修C、岸基维修D、三种中任选一种D24、SOLAS公约对航行于A3或A4海区的船舶，无线电设备维修配备方案应采用（）：A、双套设备B、海上电子维修C、岸基维修D、三种中任选两种D25、GMDSS设备主要是以（）为依据进行配备的：A、船舶吨位B、船舶航区C、各国自定规范D、船舶动力推进装置的功率B26、IMO关于船舶配备双套设备的要求（）：A 一个VHF电台（VHF收发机+DSC设备+CH70A值守机）B 一个组合电台（MF/HF收发机+DSC设备+DSC值守机+NBDP）或INMARSAT SES一台C、NA VTEX接收机D、A+BD27、下面那一项不属于GMDSS的功能（）:A.WEATHER FAXB.遇险报警C.常规通信D.现场通信A28、没有报警功能的设备为（）:A.EPIRBB.NA VTEXC.DSCD.卫星移动站B29、航行在A2、或者A3、或者A4海区的船舶应至少有（）名持有普通操作员证书的通信设备操作人员。

A.1B.2C.3D.4B30、船对船遇险报警应用( )。

A.卫星EPIRB和VHF_EPIRBB.A站和SARTC.VHF—DSC和MF—DSCD. C站和SARTC31、500总吨以上的船舶至少配备( )台双向VHF无线电话通信设备。

A.2B.3C.4D. 5B32、遇险现场通信常使用（）:A.HF无线电话和电传B.INMARSA T船站的电话和电传C.MF/VHF无线电话和电传D.VHF/DSCC33、船对船的遇险报警应使用（）设备:A.卫星EPIRB和VHF/EPIRBB.VHF/DSC和MF/DSCC.INMARSAT—A船站和SARTD.INMARSAT—A船站或B34、ISDN业务付费的特点是（）。

A.付费与通信时间成正比B.陆地用户付费C.按传输信息量的大小付费D.按月付费A35、IMO所定义的A3海区是指（）：A、除A1和A2海区外的南北纬70度之间广阔区域B、INMARSA T静止卫星覆盖区C、具有DSC报警功能的MF海岸电台覆盖区D、南北纬度70度以上的两极地区A36、在GMDSS中，救生艇至少应配备（）：A、救生艇电台、手提式VHF双向无线电话（包括16CH及1-2个VHF频道）、SARTB、2182KHz收发信机、无线电测向仪、手提式VHF双向无线电话（包括16CH及1-2个VHF频道）、SARTC、2182KHz收发信机、S-EPIRB、VHF双向无线电话（包括16CH及1-2个VHF频道）、SARTD、手提式VHF双向无线电话、SARTD37、下述哪种设备属于GMDSS在1999年2月1日全面实施后船舶基本配备的设备：A、INMARSAT—C船站B、2182KHz无线电话值守机C、L波段EPIRB或406MHz—EPIRBD、MF/HF DSC扫描值守机C38、指出下述电传指令中哪一个是船舶请求海上医疗帮助的TELEX通信指令？A、NA V+B、HELP+C、MED+D、OPR+C39、船舶进行测试呼叫选用的优先等级是：常规40、GMDSS正式生效日期是：1999年2月1日41、GMDSS系统有（）个分系统。

442、应急通信负责人为：船长43、中国的RCC总部位于何处？北京44、A4海区播发的航行警告主要靠（）来实现。

HF—NBDP45、GMDSS船载设备的基本配备是（）：A、VHF无线电话，有CH70DSC功能的VHF和VHF/DSC值守机B、至少两台SART和EPIRBC、NA VTEX接收机，EGC设备D、A+B+CD46、500总吨以上的船舶至少配备( )台双向VHF无线电话通信设备。

A.2B.3C.4D. 5B47、GMDSS中遇险报警指（）:A.船对岸的报警B.船对船的报警C.岸对船的报警D.以上都是D48、遇险现场通信常使用（）:A.HF无线电话和电传B.INMARSA T船站的电话和电传C.MF/VHF无线电话和电传D.VHFD49、IMO所定义的A3海区是指（）:A.南北纬70度之内的广阔区域；B.除A1、A2海区外的静止卫星覆盖区；C.具有DSC报警功能的MF海岸电台覆盖区；D.南北纬70度以上的两极地区。

A50、GMDSS设备主要是以（）为依据进行配备的：A、船舶吨位B、船舶航区C、各国自定规范D、船舶动力推进装置的功率B51、每艘客船至少应配备（）只9GHz SART:A.1B.2C.3D.4B52、MPDS业务付费的特点是（）A.与通信时间成正比B.按占用信道的时间付费C.按传输信息量的大小付费D.按月付费C53、在A2海区的遇险船舶要实现船到岸报警，可以选择在DSC遇险与安全频率( )上发射。

A、VHF CH70B、MF 2187．5kHzC、HF 8414．5kHzD、HF某一遇险报警频率B54、分配给我国的海上识别数字为( )。

A、431B、412C、336D、216B55、我国上海岸台的识别码为( )。

A、004121100B、004122100C、004123100D、004124100B56、遇险电文中通信模式未注入，与遇险船联系采用( )：A、NBDPB、卫星C、电话D、无法确定C57. 航行在A1海区的船舶应至少有（）名持有普通操作员证书的通信设备操作人员。

A．1 B. 2 C. 3 D.4A58. 交通系统的船舶经标志为( )账务结算单位负责电信费用的结算01030204B59. 仅在A1海区航行的船舶，可配备（）:A.含DSC功能的VHF设备B.MF/DSC值守机C.SART/EPIRB/NA VTEX等D.A+CD60. GMDSS系统中，不使用的通信方式是( )A.SSBB.NBDPC.MORSED.EGCD第二部分：地面通信系统与业务1、D层电子浓度变化的特点是（）：A、白天存在，夜间消失B、白天夜间存在C、夜间存在，白天消失D、白天浓度小，夜间浓度大，冬季大，夏季小A2、E层电子浓度变化的特点是（）：A、白天存在，夜间消失B、白天夜间存在C、夜间存在，白天消失D、白天浓度小，夜间浓度大，冬季大，夏季小B3、白天在较远的地方收不到中波，而晚间可以收到的原因是白天（）：A、电离层D层吸收B、E层吸收C、F1层吸收D、F2层吸收A4、中波在夜间传播的主要方式是（）：A、天波传播B、地波传播C、空间波传播D、天波与地波传播D5、中波在白天传播的主要方式是（）：A、天波传播B、地波传播C、空间波传播D、天波与地波传播B6、接收中频信号，夜间接收距离较远的原因是（）：A、太阳紫外线对电磁波的强烈干扰B、夜间电气干扰C、白天吸收地波强D、夜间除地波传播外，还靠天波折射D7、短波传播存在寂静区，其主要原因是（）：A地波传播，因发射台太远信号衰减，接收台收不到B.天波传播存在跃距，且跃距大于地波传播的最大距离C.天波传播的多径传播引起衰减D、A+B D8、电离层在夏季白天时常划分成（）：A、D、E、F层B、E、F1、F2层C、D、E、F1、F2层D、E、F层C9、电离层在夏季夜间时常划分成（）：A、D、E、F层B、E、F1、F2层C、D、E、F1、F2层D、E、F2层D10、短波段无线电波具有许多特点，下面哪一种描述是错误的（）：A、短波的电波波长为10—100mB、电离层对电波的衰减与频率无关C、天波作用距离较远D、沿地面传播时，衰减很快B11、对定点通信在白天与夜间、冬季与夏季使用频率不同是（）通信特有的特点：A、长波B、中波C、短波D、微波C12、由于电子浓度是变化的，在短波通信中，为了保证通信的连续进行，实际使用频率一般为最高可用频率的（）：A、100%B、80%—90%C、50%—60%D、30%B13、在短波通信中，白天使用较高的频率，原因是（）：A、白天电子浓度大B、白天电子浓度小C、白天电子浓度变化快D、白天电子浓度稳定A14、下面（）种情况最易产生绕射：A、波长大于障碍物尺寸B、波长远大于障碍物尺寸C、波长小于障碍物尺寸D、波长等于障碍物尺寸B15、当船舶处于寂静区时，船舶电台应（）：A、降低工作频率通信B、降低发射功率通信C、提高工作频率通信D、提高发射功率通信A16、船用中波天线一般呈现的阻抗特性是（）：A、电容性，大电阻B、电容性，小电阻C、纯电阻性D、电感性，大电阻B17、电波在外层空间传播时，我们把（）频段称为最佳频段或“无线电之窗”：A、30M H Z以下B、30—50M H ZC、1—10G HZD、19—29G H ZC18、短波传播的衰落现象是由于（）：A、反射次数不同引起B、地波与天波的迭加引起C、反射次数不同引起与漫反射的电波共同引起D、漫反射C19、地面通信系统主要包括的通信设备是（）。