A.PAN-PAN
B.MAYDAY
C.SOS
D.SECURITY
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最新試題
The expression DROP ANCHOR means（）.
Which radiotelephone signal indicates receipt of a distress message?（）
What is the（）of the turning circle in mavoeuvring?
We have no steel wire．You had better（）us one.
To reduce mild fever the MOST useful drug is（）.
The term OIL as used in the Oil Pollution Regulations means（）.
The expression FIRST MAGNITUDE is usually used to refer only to bodies of magnitude（）.
What is required to launch a boat stowed in a crescent davit?（）
PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）
There is plenty of（）at this area.