A.10 minutes every 4 hours
B.half an hour every other hour
C.irregular period of time
D.5 minutes every two hours
您可能感興趣的試卷
你可能感興趣的試題
A.on the bridge
B.in the coast station
C.on the forecastle
D.on starboard side
A.search and rescue
B.safe
C.co-ordinated
D.hydrographic
A.special
B.different
C.expensive
D.valuable
A.a mother ship
B.a lifeboat
C.a life craft
D.all of A,B,C
A.any transmission
B.any harmful transmission
C.to use radiotelephone
D.using radiotelephone
最新試題
The vessel has stayed in port for seven days because she needs（）.
The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
（）will form the basis for distress alerting and safety calling.
If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.
What following is not among the function of SOLAS ships?（）
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
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.
Radio beacon can be activated（）in case of distress.
The frequency（）the safety message will be transmitted shall be included in DSC safety call.
Can MF/HF radiotelephone receive the MSI sent from the coast stations alone?（）