A.B2
B.B1
C.MAR
D.NNN
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A.frequency allocated
B.both language and frequency
C.language used
D.transmission power and time
A.10 minutes every 4 hours
B.half an hour every other hour
C.irregular period of time
D.5 minutes every two hours
A.in any INMARSAT regions
B.in each NAVTEX area
C.at any distance
D.in Areas A3 and A4
A.navigational / typhoon
B.traffic / meteorological
C.marine / hurricane
D.navigational / meteorological
A.dedicated system
B.MSI broadcasts
C.518KHZ
D.channel 16
最新試題
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.
COSPAS-SARSAT is intended to be used for（）.
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.
For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.
By using（）system a ship can send a distress message and know with certainty it will be received.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.
The vessel has stayed in port for seven days because she needs（）.