A.DF
B.Radar System
C.DSC System
D.COSPAS-SARSAT
您可能感興趣的試卷
你可能感興趣的試題
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
A.Because they are not engaged in the distress traffic
B.they will affect the transmission of the distress traffic
C.The powers of these stations are very weak
D.They are not in charge of search and rescue
最新試題
The rescue coordination center may（）on stations which interfere with traffic.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
Particular care should be（）in selecting CESs in areas where Ocean Regions overlap.
The advantage of geostationary satellites is（）.
The vessel has stayed in port for seven days because she needs（）.
Before GMDSS, if the radio officer on board is serious ill,（）.
Stations in the United States of America are grouped by states arranged in the alphabetical order of their（）.
Please use（）for（）.
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.
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.