单选题Details of coast radio stations and radar stations can be found in（）.AAdmiralty ChartBAdmiralty Light listCAdmiralty List of Radio SignalsDAdmiralty Notices to Mariners
单选题
Details of coast radio stations and radar stations can be found in（）.
A
Admiralty Chart
B
Admiralty Light list
C
Admiralty List of Radio Signals
D
Admiralty Notices to Mariners
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Which two statements describe the operation of the CSMA/CD access method, which is in use on the Ezonexam network? (Choose two)A. After a collision, the station that detected the collision has first priority to resend the lost data.B. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.C. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.D. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method.E. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.F. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data.
What is meant by the term“radio silence”________．A.Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channelB.Stations remaining off the air to safeguard proprietary informationC.Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting“window”for distressed vessels to transmit distress alerts using J3ED.Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic
Advertisements that__________ the travel agency's newest package vacations will air on radio and television stations tomorrow evening.A.promoteB.overlookC.submitD.admire
Heating，ventilating，and air conditioning（HVAC） systems are______in most of underground subway stations to provide comfortable and fresh air to underground subway stations。A.assembledB.installingC.equippedD.installed
单选题With the help of GMDSS（）can be alerted to a distress incident as soon as possible.Aall ships in a large sea areaBonly the sea authorities ashoreCthe SAR units ashore and at seaDthe port radios and the coast stations
单选题General radio communications in the global system are those between（）concerning the management and operation of the ships and may have impact on their safety.ASAR party and the ship in distressBSAR authorities and the ship in distress and survival craftCA ship station and any coast stationDShip stations and shore-based communication network
单选题The FEC mode is for（）from（）station to two or more other stations when available.Areceiving messages/one stationBtransmission/ one coast station or shipCcommunicating /one shipDcontacting/other
单选题CATEGORY A EPIRB’s transmit on frequencies that are monitored by（）.Aorbiting satellites in spaceBcommercial radio stationsCprivate，commercial，and military aircraftDordinary radio stations
单选题The list of Coast Stations is republished（）in a trilingual.Aevery two yearsBevery three yearsCevery yearDevery four years
单选题Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）ANo, it receives the MSI from ship stationsBYes, it canConly with NBDP terminal, can it receives the MSI sent from coast stationsDNo, it can not receive the MSI sent from coast stations
单选题To obtain accuracy in fixing by DF cross bearings，（）should be used.Atwo stations，including one on the nearest coastBtwo stations，including one on the nearer coastCthree stations，including one on the farthest coastDthree stations，including one on the nearest coast
单选题（）means a technique using digital codes which enables a radio station to establish contact with, and transfer information to another station or group of stations and complying with the relevant recommendations of the CCIR.ADSCBMSICEGCDNBDP
单选题According to the basic concept of GMDSS,（）can be rapidly alerted to a distress incident.Aonly SAR authorities on landBall ships in a very large sea areaCthe nearest coast stations and port radiosDthe SAR authorities ashore as well as ships in the vicinity of the casualty
单选题Digital Selective Calling means a technique using（）which which enables a radio station to establish contact with, and transfer information to another station or group of stations and complying with the relevant recommendations of the CCIR.Adigital codesBcode messagesCnorse codesDdistress messages
单选题What is the primary purpose for Digital Selective Calling (DSC)?（）ADSC provides reception of weather and navigational warnings plus search and rescue informationBDSC provides low-cost，routine communications for the vessel operatorCDSC is to be used for transmitting and receiving distress alerts to and from other ships or coast radio stations via radioDThis aids SAR authorities in tracking a vessel's position by satellite
单选题（）can receive MSI sent by coast station.AA NAVTEX receiverBAn EGC receiverCMF/HF radio telephoneDHF radio telephone with NBDP
单选题The receiving stations can use the B2 character to（）different, classes of messages.AidentifyBCorrectCRejectDPrint out
单选题The Network Coordination Station for the INMARSAT-A coast stations in the Pacific ocean region is in（）.AYamaguchi, JapanBBeijing, ChinaCNakhodka, RussiaDPerth, Australia
单选题Your assigned emergency stations aboard your vessel can be found on the ships （）.Amuster listBcertificate of inspectionCclearance papersDpermit to proceed
单选题The ARQ mode should be applied（）.Awhen two stations communicate with each otherBin any radio system and at any timeCwhen one ship sends a message to another stationDfor communication among some stations
单选题The Coast Radio Stations are found in（）.AAdmiralty List of Lights and Fog SignalsBAdmiralty Maritime CommunicationsCAdmiralty List of Radio SignalsDAdmiralty Digital List of Lights
单选题The advantage of geostationary satellites is（）.Athe range of antenna can cover everywhere in the worldBwe can know the ship’s exact positionCthat the distress alert can be located as soon as possibleDantenna of permanent earth stations may be directed towards fixed points in the sky
单选题Which of the following statements is TRUE regarding automatic identification systems (AIS)? （）AAIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position and other safety related information to similarly equipped vessels，aircraft and shore stations within the areaBAIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position and other safety related information to similarly equipped vessels，aircraft and shore stations within the areaCAIS is a short-range VHF-FM system that automatically broadcasts a vessel's position and other safety related information frequently to similarly equipped vessels，aircraft and shore stations within the areaDAIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position and other safety related information to similarly equipped vessels，aircraft and shore stations within the area
单选题The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called（）.ANAVTEXBHYDROLANT/HYDROPACCNAVAREADSAFESEA
单选题Distress traffic is the communication（）between the station in distress and the ships, aircraft, coast radio stations, coast earth stations and rescue centers participating in the rescue work.AexchangeBto exchangeCexchangingDexchanged
单选题The Lists of Meteorological Observation Stations can be found in（）.AALRSBALLCAMCDATT