A.PAN-PAN
B.MAYDAY
C.SOS
D.SECURITY
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最新試題
There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.
The expression DROP ANCHOR means（）.
The term OIL as used in the Oil Pollution Regulations means（）.
What is the MOST irritating to the skin?（）
What is the（）of the turning circle in mavoeuvring?
What is normally used to pass a mooring line to a dock?（）
The use of the danger signal（）.
What does the term TO NAVIGATE WITH CAUTION mean?（）.
Which is NOT a distress signal?（）
The expression FIRST MAGNITUDE is usually used to refer only to bodies of magnitude（）.