A.a message about the safety of navigation will follow
B.a message of an urgent nature about the safety of a ship will follow
C.the sender is in distress and requests immediate assistance
D.you should secure your radiotelephone
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A.Safety message
B.Urgency message
C.Distress message
D.Routine message
A.at
B.on
C.in
D.above
最新試題
I hope you don’t mind（）the radar for us in a short time.
The winch is liable（）worn-out in this way.
In the International Code of signals，a group of three letters indicates（）.
I would be very much（）if you could arrange for a radio technician to come on board as soon as possible for my radar repair.
Geographic range is the maximum distance at which a light may be seen under（）.
The term PROLONGED BLAST refers to（）.
Proper use shall be made（）radar equipment if fitted and operational.
Keep clear（）the buoy.
The ship will be（）demurrage soon.
If passengers are on board when an abandon ship drill is carried out，they should（）.