30. Which type of message will follow the “PAN PAN” repeating three times over the
radiotelephone?
(A) safety
(B) warning
(C) urgency
(D) distress
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統計: A(3), B(8), C(100), D(9), E(0) #1900620
統計: A(3), B(8), C(100), D(9), E(0) #1900620