A.ITU
B.IMO
C.MSC
D.WMO
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A.promote
B.improve
C.guarantee
D.both A and B
A.taking the place of the radio system
B.introducing a new life-saving system
C.saving the vessels in distress
D.improving the communication on land
A.was suffering
B.is suffering
C.has suffered
D.has been suffering
A.see
B.seeing
C.be seen
D.being seen
A.where
B.when
C.after
D.unless
最新試題
Radio communication（）for many years and helps to save tens of thousands of lives.
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.
The priority of EGC messages is classified by（）.
（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
On-scene communications will normally take place between（）.
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 advantage of geostationary satellites is（）.
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.