A.by day or at night
B.almost round the clock
C.somewhat and sometime
D.from sunrise and sunset
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A.DF
B.Radar System
C.DSC System
D.COSPAS-SARSAT
A.nature of distress
B.type of assistance required
C.course and speed and time at which the information was recorded
D.A, B, C are all right
A.when two stations communicate with each other
B.in any radio system and at any time
C.when one ship sends a message to another station
D.for communication among some stations
A.VHF channels 16 and 13
B.Appropriate DSC distress and safety frequencies
C.INMARSAT TDM message channel
D.VHF channel 70 and channel 8
A.SAR party and the ship in distress
B.SAR authorities and the ship in distress and survival craft
C.A ship station and any coast station
D.Ship stations and shore-based communication network
最新試題
Every lifeboat which is fitted with a fixed two-way vhf radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.
（）will form the basis for distress alerting and safety calling.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
Ship-to-ship distress alerting should be conducted by（）.
We consider（）send a helicopter with medical facilities to the distress area.
As each MSI message will have a unique identity, the printing of messages already received correctly is（）.
Please use（）for（）.
The advantage of geostationary satellites is（）.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）
The priority of EGC messages is classified by（）.