單項選擇題

Messages concerning weather conditions transmitted by radiotelephone are preceded by（）.

A.MAYDAY
B.PAN-PAN
C.SECURITE
D.SOS

你可能感興趣的試題

單項選擇題

The radiotelephone message that indicates a station is about to transmit a message concerning the safety of navigation or important meteorological warnings commences with（）.

A.TTT
B.The spoken word PAN
C.The spoken word SECURITE
D.XXX

單項選擇題

The Urgency Signal（）indicates that the station calling has a very urgent message to transmit concerning the safety of a ship or aircraft，or of some person on board or within sight.

A.SOS
B.XXX
C.TTT
D.PAN