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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.
考题
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
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Advertisements that__________ the travel agency's newest package vacations will air on radio and television stations tomorrow evening.A.promote
B.overlook
C.submit
D.admire
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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.assembled
B.installing
C.equipped
D.installed
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单选题With the help of GMDSS（）can be alerted to a distress incident as soon as possible.A
all ships in a large sea areaB
only the sea authorities ashoreC
the SAR units ashore and at seaD
the port radios and the coast stations
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CATEGORY A EPIRB’s transmit on frequencies that are monitored by（）.A
orbiting satellites in spaceB
commercial radio stationsC
private，commercial，and military aircraftD
ordinary radio stations
考题
单选题The list of Coast Stations is republished（）in a trilingual.A
every two yearsB
every three yearsC
every yearD
every four years
考题
单选题Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）A
No, it receives the MSI from ship stationsB
Yes, it canC
only with NBDP terminal, can it receives the MSI sent from coast stationsD
No, it can not receive the MSI sent from coast stations
考题
单选题To obtain accuracy in fixing by DF cross bearings，（）should be used.A
two stations，including one on the nearest coastB
two stations，including one on the nearer coastC
three stations，including one on the farthest coastD
three stations，including one on the nearest coast
考题
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.A
DSCB
MSIC
EGCD
NBDP
考题
单选题According to the basic concept of GMDSS,（）can be rapidly alerted to a distress incident.A
only SAR authorities on landB
all ships in a very large sea areaC
the nearest coast stations and port radiosD
the SAR authorities ashore as well as ships in the vicinity of the casualty
考题
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.A
digital codesB
code messagesC
norse codesD
distress messages
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（）can receive MSI sent by coast station.A
A NAVTEX receiverB
An EGC receiverC
MF/HF radio telephoneD
HF radio telephone with NBDP
考题
单选题The receiving stations can use the B2 character to（）different, classes of messages.A
identifyB
CorrectC
RejectD
Print out
考题
单选题The Network Coordination Station for the INMARSAT-A coast stations in the Pacific ocean region is in（）.A
Yamaguchi, JapanB
Beijing, ChinaC
Nakhodka, RussiaD
Perth, Australia
考题
单选题Your assigned emergency stations aboard your vessel can be found on the ships （）.A
muster listB
certificate of inspectionC
clearance papersD
permit to proceed
考题
单选题The ARQ mode should be applied（）.A
when two stations communicate with each otherB
in any radio system and at any timeC
when one ship sends a message to another stationD
for communication among some stations
考题
单选题The Coast Radio Stations are found in（）.A
Admiralty List of Lights and Fog SignalsB
Admiralty Maritime CommunicationsC
Admiralty List of Radio SignalsD
Admiralty Digital List of Lights
考题
单选题The advantage of geostationary satellites is（）.A
the range of antenna can cover everywhere in the worldB
we can know the ship’s exact positionC
that the distress alert can be located as soon as possibleD
antenna of permanent earth stations may be directed towards fixed points in the sky
考题
单选题Which of the following statements is TRUE regarding automatic identification systems (AIS)? （）A
AIS 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 areaB
AIS 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 areaC
AIS 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 areaD
AIS 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
考题
单选题The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called（）.A
NAVTEXB
HYDROLANT/HYDROPACC
NAVAREAD
SAFESEA
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The Lists of Meteorological Observation Stations can be found in（）.A
ALRSB
ALLC
AMCD
ATT
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