G证英语阅读Word格式.docx

1、Time;Nature of distress （ in the form of a standard code）;Ships position.Where fitted, ships officers should ensure they are fully conversant with the procedure for entering the necessary information into the DSC equipment. At sea, unless provided automatically from a navigation system, ships positi

2、on should be updated at least once during each watch period.Question: 1、Each DSC”PACKET”have priority（priorities）A、1 B、2 C、3 D、42、Which of the following staement is not true &nbds?A、DSC message has a MMSI of source stationB、DSC message has a MMSI of source stationC、DSC message has a name of source s

3、tationD、A DSC message also has other information for sending round.3、Which of the following statement is true?A. Not every ship is required to keep continuous watch on the distress frequency.B. A ship can keep a watch on the distress frequency at the time it thinks convenient.C. An exclusive DSC wat

4、ch receiver is required to keep continuous watch on the distress frequencies.D.A simple single channel receiver is not suitable for keeping continuous watch on the distress frequency.4、at sea ,if dsc equipment can not get shi is position message from a navigation system automatically,then the positi

5、on message should be renewedA、at least every 4 hoursB、at least every 8 hoursC、at least every 12 hoursD、at least every 24 hours5、according to the message ,distress message can be received by（ ）A 、ALL STATIONB、COAST SATION C、SHIP STATIOND、GROUP OF SPECIFIED STATION（二）NAVTEX systemThe NAVTEX receiver i

6、s a Narrow Band Direct Printing （NBDP） device operating on the frequency 518Khz, （some equipment can also operate on 490Khz and 4209.5Khz）, and is a vital part of the Global Maritime Distress and Safety System （GMDSS）.It is automatically receives Maritime Safety Information such as Radio Navigationa

7、l Warnings, Storm/Gale Warnings, Meteorological Forecasts, Piracy Warnings, Distress Alert etc.The information received is printed on the receivers own paper recorder roll. Each message begins with starts of message function （ZCZC） followed by a space then four B characters. The First, （B1）, identif

8、ies the station being received, the second, （B2）, identifies the subject i.e. Navigational Warning, Met Forecast etc, and the third and fourth, （B3+B4）, form the consecutive number of the message from that station. This followed by the text of the message and ends with an end of message function （NN

9、NN）.The NAVTEX system broadcasts COASTAL WARNING which cover the area from the fairway buoy out to 250 nautical miles from the transmitter, the transmission from some transmitters can be received out to 400 nautical miles and even further in unusual propagation conditions. 1. Which frequency is the

10、NAVTEX receiver usually operating on?A. 490Khz B. 4209.5Khz C. 518Khz D. 2182 Khz. 2. Each message begins with starts of message function （ ）?A. NNNN B. KKKK C. ZCZC D. NCNC3、Which of the following is no TRUE?A、Each message begin with starts of message function（ZCZC）B、Each message ends with an end o

11、f message function（nnnn）C、THE NAVTEX system can cover the 250miles from the transmitterD、THE NAVTEX system can not cover 400 miles from the transmitter（三）Terrestrial CommunicationsLong-Range ServiceUse of HF provides a long-rang service in both the ship-to-shore and shore-to-ship directions. In case

12、 covered by INMARSAT it can be used as an alternative to satellite communications and outside these areas it provides the only long-rang communication capability. Frequencies have been designated in the 4,6,8,12 and 16 MHz bands for this service.Digital selective calling （DSC） forms the basis of dis

13、tress alerting and safety communications. Distress and safety communications following a DSC call can be performed by radiotelephone or NBDP.Medium-Range ServiceA medium-range service is provided on frequencies in the 2 MHz band. In the ship to shore, ship to ship and shore to ship directions 2187.5

14、kHz will be used for distress alerts an safety calls using DSC, and 2182kHz will be used for distress and safety traffic by radiotelephone, including SAR co-ordinatind and on-scene communications. 2174.5kHz will be used for radiotelex （NBDP） distress and safety traffic. 1. Which frequency will be us

15、ed for distress and safety traffic by radiotelephone? A. 2187.5 kHz B. 2182 kHz C. 2174.5kHz D. 2152kHz2、The HF can provide the service which is A、not covered by INMARSATB、only short-range serviceC、only Medium-Range ServiceD、covered by INMARSAT3、Which of the following is true ?A、Digital selective ca

16、lling（DSC） follows a telephone callB、Distress and safety communications by radiotelephone or NBDP follows a DSC distress callC、Digital selective calling（DSC） follows NBDP trafficD、Radio telephone alert forms the basis of distress alerting and safety communication（四）Digital selective calling （DSC） on

17、 VHF, MF and HFThe IMO also introduced digital selective calling （DSC） on VHF, MF and HF maritime radios as part of the GMDSS system. DSC is primarily intended to initiate ship/ship, ship/shore, and shore/ship radiotelephone and MF/HF radiotelex calls. DSC calls can also be made to individual ships

18、or groups of ships. DSC distress alerts, which consist of a preformatted distress message, are used initiate emergency communications with ships and rescue coordination centers. When fully implemented, DSC will eliminate the need for persons on a ships bridge or on shore to continuously guard radio

19、receivers on voice radio channels, including VHF channel 16 （156.8 MHz） and 2182 kHz now used for distress, safety and calling. A listening watch aboard GMDSS-equipped ships on 2182 kHz ended on 1 February 1999, and on VHF channel 16 is scheduled to end on 1 February 2005. We urge that the DSC-equip

20、ped VHF and MF/HF radios be externally connected to a satellite navigation receiver. That connection will ensure accurate location information is sent to a rescue coordination center if a distress alert is ever transmitted. FCC regulations actually require that ships position be manually entered int

21、o the radio every four hours on ships required to carry GMDSS equipment, while that ship is underway （47 CFR 80.1073）. Once SOLAS ships are allowed to disband watch-keeping on VHF and MF radiotelephone channels, other ships are going to need DSC-equipped radios to contact these ships, particularly i

22、n a passing situation, especially when outside U.S. waters. We believe VHF, MF and HF radiotelephone equipment carried on ships should include a DSC capability as a matter of safety. To achieve this, the FCC requires that all new VHF and MF/HF maritime radiotelephones type accepted after June 1999 t

23、o have at least a basic DSC capability. VHF digital selective calling also has other capabilities beyond those required for the GMDSS. The Coast Guard uses this system to track vessels in Prince William Sound, Alaska, Vessel Traffic Service. IMO and the USCG also plan to require ships carry a Univer

24、sal Automatic Identification System, which will be DSC-compatible. Countries having a GMDSS A1 Area will be able to identify and track AIS（自动识别系统）-equipped vessels in its waters without any additional radio equipment. 1、According to this message, the watch-keeping of VHF CH16 will be ended _.A. on 1

25、 February 1999. B. on 1 February 2005. C. on 1 February 2000. D. on 1 February 2010.2、The writer intends that the vhf/mf/hf radio equipment A、should have its own satellite navigator B、have nothing to do with the satelling navigation systemC、should be connected to a statellite navigatorD、should chang

26、e the ship is position manually every hours 3、Which statement is not correct?A、DSC can initiate radio-telephone and radiotelex calls on VHF/HF/MF bands.B、DSC can initiate radio-telephone calls on VHF/HF/MF bands.C、DSC can initiate rdiotelex calls on HF/MF bandsD、DSC can initiate VHF/HF/MF radio-tele

27、phone and HF/MF rdiotelex calls4、The AIS equipment will be used to A、identifity and track vessels in A1areaB、identifity and track vessels in A2areaC、identifity and track vessels in A3areaD、identifity and track vessels in A4area5、The meaning of word “rdios” in the passage is A、radio equipmentsB、radio wavesC、radio programsD、no meaning（五） Three types ship earth station terminals of Inmarsat Satellite systems operated by the International Mobile Satellite Organization （Inmarsat）, are also important elements of the GMDSS. Three types of Inmarsat ship eart