18. If you wished to transmit a message by VHF concerning the safety of navigation, you
would preface it by the word ________.
(A) MAYDAY
(B) PAN PAN
(C) SECURITE
(D) SAFETY

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統計： A(0), B(0), C(5), D(0), E(0) #4055226

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#7682683
考題觀念 本題考的是國際海上無線電通訊...
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