单选题All stations which receive a distress alert shall immediately cease（）.Aany transmissionBany harmful transmissionCto use radiotelephoneDusing radiotelephone
单选题
All stations which receive a distress alert shall immediately cease（）.
A
any transmission
B
any harmful transmission
C
to use radiotelephone
D
using radiotelephone
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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.
Which categories of NAVTEX messages may not be selectively rejected through receiver programming ________．A.Navigational warningsB.Weather warningsC.SAR and distress alert informationD.All of the above
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
Which action should be taken on receipt of a GMDSS distress alert ________．A.Read the display screen and/or printoutB.Silence the alarmC.Listen for any follow up voice/telex transmission on the appropriate frequencyD.All of the above
ALL PASSENGERS OF DECK NO.2 ARE REQUESTED TO FOLLOW THE CREW MEMBERS WHO WILL ESCOPT YOU TO YOUR ASSEMBLY STATIONS. From this sentence you can concluded that the vessel is in ______.A.immediate danger to collide with another vesselB.a situation in which more passengers will embark on boardC.berth and ready to disembark her passengersD.Distress
单选题What is the action that a GMDSS Radio Operator should take when a DSC distress alert is received? （）ANo action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequencyBThe operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was receivedCThe Operator should immediately set continuous watch on VHF channel 70DThe Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received
单选题The officer in charge of the deck watch in port shall not（）.Amake rounds to inspect the ship at appropriate interalsBtake every precaution to prevent pollution of the environment by the shipCenter, in the bell book, all important events affecting the shipDoffer assistance to ships or person in distress
单选题If a DSC distress relay is transmitted from coast station , it will（）.Aindicate the ship in distress that the alert has been receivedBalert ships in the area of a distress incident that a distress has occurredCinform other coast station of distress incidentDrepeat the distress alert in 5 minutes
单选题The basic concept of GMDSS is（）.ASearch and rescue authorities ashore will rapidly received an distress alert and acted uponBSAR units will be rapidly alerted to a distress incident and assist in a coordinated SAR operationCShips navigating in the immediate vicinity of the ship in distress will rapidly alerted to the alert and give their help accordinglyDThe RCC will rapidly alerted to a distress alert through satellite and terrestrial communication techniques and conducted a rescue operation immediately
单选题Please use（）for（）.AEnglish/all distress communicationsBChinese/some distress callsCthe language decided by Administration/all distress callsDJapanese/some distress alerts
单选题Which system may be useful for messages，such as local storm warnings or a shore-to-ship distress alert，for which it is inappropriate to alert all ships in the satellite coverage area?（）ANAVTEXBEGCCAMVERDDSC
单选题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.AassistBsend a rescue vesselCsearch the distress areaDreach the distress position at once
单选题What shall be conducted during a fire and boat drill?（）AAll watertight doors which are in use while the vessel is underway shall be operatedBAll lifeboat equipment shall be examinedCFire pumps shall be started and all exterior outlets openedDAll of the above
单选题When receiving a distress alert, the SAR authorities ashore and the ships in the vicinity of the ship in distress will（）soonest.Areach the distress areaBconduct a sector searchCsend rescue vesselsDassist coordinately in SAR operation
单选题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.AassistBsend a rescueCsearch the distress areaDReach the distress position at once
单选题Which channel and mode should be used when initiating a distress alert transmission（）.AChannel 6 DSCBChannel 6 RadiotelephonyCChannel 13 Radiotelephony and channel 16 DSCDChannel 70 DSC
单选题why do some stations keep silence?（）ABecause they are not engaged in the distress trafficBthey will affect the transmission of the distress trafficCThe powers of these stations are very weakDThey are not in charge of search and rescue
单选题（）, which consisted of seven short blasts and one prolonged blast, all passengers have to go to their assembly station.AWhen the distress alert is soundedBWhen the emergency equipment is switching onCWhen the general emergency alarm is soundedDWhen the distress broadcast is sounded
单选题Which categories of NAVTEX messages may not be selectively rejected through receiver programming?（）ANavigational warningsBWeather warningsCSAR and distress alert informationDAll of the above
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 EPIRB transmits a distress alert that is received and relayed by an INMARSAT satellite?（）AClass A EPIRBsBClass B EPIRBsCL-Band EPIRBsDCategory I EPIRBs
单选题What information will a distress alert contain?（）Anature of distressBtype of assistance requiredCcourse and speed and time at which the information was recordedDA, B, C are all right
单选题Which action should you take after sending a false distress alert on VHF?（）ASend a DSC cancellation message on Ch-70BMake a voice announcement to cancel the alert on Ch-16CMake a voice announcement to cancel the alert on Ch-13DMake a voice announcement to cancel the alert on Ch-22A
单选题You receive a call from the MSA OF CHINA addressed to all stations. The call begins with the words Pan-Pan (3 times). Which type of emergency signal would this be?（）.ASafety signalBUrgency signalCDistress signalDRed alert signal
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What does the DSC control unit do if the GMDSS radio operator fails to insert updated information when initiating a DSC distress alert?（）AIt will abort the transmission and set off an audible alarm that must be manually resetBIt will initiate the DSC distress alert but，as no information will be transmitted，rescue personnel will not be able to identify the vessel，its position or its situationCIt will initiate the DSC distress alert and default information will automatically be transmittedDIt will initiate the DSC distress alert，but any station receiving it will have to establish contact with the distressed vessel to determine its identity，position and situation