A.PAN-PAN
B.MAYDAY
C.SOS
D.SECURITY
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A.TTT
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A.TTT
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C.The spoken word SECURITE
D.XXX
A.SOS
B.XXX
C.TTT
D.PAN
A.SOS
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D.PAN
最新試題
The radiotelegraph alarm signal is（）.
In radiotelephone communications，the prefix PAN-PAN indicates that（）.
Which is NOT a distress signal?（）
The expression FIRST MAGNITUDE is usually used to refer only to bodies of magnitude（）.
The vessel was drifted off from her（）due to strong wind.
What is required to launch a boat stowed in a crescent davit?（）
To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.
What are symptom(s) of a ruptured appendix?（）
The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word（）.
The towing light is a(n)（）.