单项选择题
What is the MOST important thing you should do before transmitting on a marine radio? （）
A.Ask for permission
B.Record the time in your radio log
C.Press the push to talk button three times
D.Monitor the channel to insure that it is clear
相关考题
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单项选择题
What is a “Special Warning”? （）
A.An urgent message concerning a vessel in distress
B.A weather advisory about unusual meteorological or oceanographic phenomena hazardous to vessels
C.A broadcast disseminating an official government proclamation affecting shipping
D.A radio navigational warning concerning a particularly hazardous condition affecting navigation -
单项选择题
What does a SART signal sound or look like?（）
A.It transmits "SOS" and the vessel's name and position in slow speed Morse Code
B.It will appear on a radar unit's PPI as a line of dots radiating outward with the innermost dot indicating the SART's position
C.It will appear on a radar unit's PPI as a line of dots radiating outward with the outermost dot indicating the SART's position
D.None of the above -
单项选择题
The radiotelephone safety signal is（）.
A.securite repeated 3 times
B.safety repeated 3 times
C.pan pan repeated 3 times
D.securite securite repeated 3 times
