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单选题
If a DSC distress relay is transmitted from coast station , it will（）.
A
indicate the ship in distress that the alert has been received
B
alert ships in the area of a distress incident that a distress has occurred
C
inform other coast station of distress incident
D
repeat the distress alert in 5 minutes
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更多 “单选题If a DSC distress relay is transmitted from coast station , it will（）.A indicate the ship in distress that the alert has been receivedB alert ships in the area of a distress incident that a distress has occurredC inform other coast station of distress incidentD repeat the distress alert in 5 minutes” 相关考题
考题
DSC遇险呼叫时,它的格式符£¯类别是()。
A、Distress/distressB、allship/DistressC、Distress/ALL shipD、All ship/All ship
考题
The data station usually means a(71)unit that provides data for transmission, that accepts transmitted data, and that performs all functions necessary for communication with another functional unit. Data stations may be divided into two kinds, the primary stations and the secondary stations, (72)control functions.In(73)data link control, the primary station is the data station that supports the primary control functions of the data link, generates commands to be transmitted, and interprets received responses. Specific responsibilities assigned to the primary station include initialization of control signal interchange, organization of data flow and actions regarding error control and error recovery functions. The secondary station executes data link control functions as (74)by the primary station, interprets received commands and (75) responses to be transmitted.A．performanceB．functionalC．capacityD．quality
考题
Both bus and tree topologies are characterized by the use of multipoint (71) ．For the bus，all stations attach，through appropriate hardware (72) known as a tap，directly to a linear transmission medium，or bus．Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the (73) ．A transmission from any station propagates the length of the medium in both directions and can be received by all other (74) ．At each end of the bus is a (75) ，which absorbs any signal，removing it from the bus．（71）A．mediumB．connectionC．tokenD．resource
考题
如果用DSC设备收妥确认遇险报警信息，在DSC上应选（）A、DISTRESS ACKNOWLEDGEB、URGENT CALLC、DISTRESS RELAYD、SAFETY CALL
考题
Both bus and tree topologies are characterized by the use of multipoint (1).For the bus, all stations attach, through appropriate hardware (2) known as a tap, directly to a linear transmission medium, or bus. Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the(3). A transmission from any station propagates the length of the medium in both directions and can be received by all other (4). At each end of the bus is a (5) , which absorbs any signal, removing it from the bus.
空白（1）处应选择（）A、mediumB、connectionC、tokenD、resource
考题
单选题DSC distress relays can be transmitted by either（）or（）.A
a coast station/a ship stationB
an EPIRB/a SARTC
ARQ/FECD
a back-up satellite/a land SAR unit
考题
单选题The distress message of a ship should include considerable information which might facilitate the rescue. This information should（）.A
ALWAYS be included in the initial distress messageB
be sent to a Coast Guard station FIRSTC
be transmitted as a series of short messages，if time allowsD
include the vessel's draft
考题
单选题If no distress acknowledgement is received（）a DSC distress call transmission, then the ship in distress may repeat the DSC distress call attempt after a delay of between 3.5 and 4.5 minutes from the beginning of the initial call.A
relevant toB
relate toC
in response toD
in relation to
考题
单选题On-scene communications will normally take place between（）.A
ship in distress and assisting unitsB
NCS and RCCC
RCCs and „0n-scene commander‟ or “co-ordinator surface search”D
ship in distress and coast station
考题
单选题On-scene communications will normally take place between（）.A
ship in distress and assisting unitsB
NCS and RCCC
RCCs and “on-scene commander” or “coordinator surface search”D
ship in distress and coast station
考题
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.A
SAR party and the ship in distressB
SAR authorities and the ship in distress and survival craftC
A ship station and any coast stationD
Ship stations and shore-based communication network
考题
单选题To evacuate a vessel from crew and passengers following a distress means（）.A
abandon vesselB
adriftC
beach toD
assembly station
考题
单选题Distress flares and smoke signals for small passenger vessels（）.A
are not required aboard vessels on runs of less than 30 minutes durationB
must be Coast Guard approved and stowed in a portable，watertight containerC
must be marked with an expiration date not more than 42 months from the date of manufactureD
All of the above
考题
单选题DSC distress acknowledgements are normally transmitted by（）in respond to a receiver DSC distress call.A
Ship stationsB
Coast stationsC
NCSsD
NCC
考题
单选题If a ship station relays a DSC distress call to an appropriate coast station, it means that（）.A
the ship has received the DSC distress call on a HF frequencyB
the coast station concerned has not acknowledged it within 5 minutesC
the ship will take command of search and rescue in 5 minutesD
A and B
考题
单选题If a DSC distress relay is transmitted from coast station , it will（）.A
indicate the ship in distress that the alert has been receivedB
alert ships in the area of a distress incident that a distress has occurredC
inform other coast station of distress incidentD
repeat the distress alert in 5 minutes
考题
单选题The FEC mode is for（）from（）station to two or more other stations when available.A
receiving messages/one stationB
transmission/ one coast station or shipC
communicating /one shipD
contacting/other
考题
单选题If a GMDSS radio operator initiates a DSC distress transmission but does not insert a message，what happens? （）A
The transmission is aborted and an alarm sounds to indicate this data must be provided by the operatorB
The transmission is not initiated and ERROR is indicated on the display readoutC
The transmission will be made with default information provided automaticallyD
The receiving station will poll the DSC unit of the vessel in distress to download the necessary information
考题
单选题What is the primary purpose for Digital Selective Calling (DSC)?（）A
DSC provides reception of weather and navigational warnings plus search and rescue informationB
DSC provides low-cost，routine communications for the vessel operatorC
DSC is to be used for transmitting and receiving distress alerts to and from other ships or coast radio stations via radioD
This aids SAR authorities in tracking a vessel's position by satellite
考题
单选题The control of distress traffic is the responsibility of（）.A
the ownersB
the charterersC
the shipperD
the vessel in distress or of the station that relays the distress message
考题
单选题The distress message of a ship should include considerable information which might facilitate the rescue. This information should（）.A
ALWAYS be included in the initial distress messageB
be sent to a MSA station FIRSTC
be transmitted as a series of short messages，if time allowsD
include the vessel's draft
考题
单选题How is “radio silence” imposed?（）A
By the On Scene Coordinator (OSC)B
By the Coast Earth Station (CES) controlling the distress communications on that frequencyC
It is imposed by the Public Correspondence Station (PCS) controlling the distress communications on that frequency or channelD
It is imposed by the High Seas Service (HSS) controlling the distress communications on that frequency or channel
考题
单选题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 /DSC
考题
单选题Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）A
If no answer is received on the designated distress frequencies，repeat the distress call on any frequency availableB
Channel 16 (156.8) may be used for distress messagesC
It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds durationD
Distress messages should first be transmitted on 2182 kHz
考题
单选题In NAVTEX service, VITAL warnings will（）by transmitting station.A
be transmitted at once though the frequency is not clearB
be transmitted as soon as the frequency is cleared coordinatelyC
be transmitted at its scheduled transmissionsD
be transmitted at next scheduled transmissions
考题
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.A
exchangeB
to exchangeC
exchangingD
exchanged
考题
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?（）A
It will abort the transmission and set off an audible alarm that must be manually resetB
It 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 situationC
It will initiate the DSC distress alert and default information will automatically be transmittedD
It 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
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