A.transmit distress signal
B.send response signal
C.transmit the signal of ship’s position
D.be started by X-band radar
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A.the main source of energy
B.emergency source of electrical power
C.the reserve source of energy
D.all of above
A.Goonhilly, UK
B.Yamaguchi, Japan
C.Perth, Australia
D.Southbury, USA
A.180E above the equator
B.64.5 E over the IOR
C.15.5W along the straight line
D.55.5W above the equator
A.complicated circumstances
B.changeable atmospheric pressure
C.large density of traffic
D.some strong signals from unwanted satellites
A.besides the polar regions
B.including the North Pole and the South Pole
C.above 70N and below 70S
D.as far north and south 70
最新試題
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.
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（）.
（）will form the basis for distress alerting and safety calling.
All coast radio stations（）DSC installed for VHF and HF.
COSPAS-SARSAT is intended to be used for（）.
Radio beacon can be activated（）in case of distress.
The priority of EGC messages is classified by（）.
Radiotelephony communication or radio telex communication or both will be carried out by terrestrial or satellite means,（）the equipment fitted on ship and the area in which the incident occurs.
Every lifeboat which is fitted with a fixed two-way（）radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.