A.Distress messages should first be transmitted on 2182 kHz
B.Channel 16 (156.8 MHz) may be used for distress messages
C.If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available
D.It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
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A.If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available
B.Channel 16 (156.8) may be used for distress messages
C.It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
D.Distress messages should first be transmitted on 2182 kHz
A.A continuous sounding with any fog signal apparatus
B.A signal sent by radiotelephone consisting of the spoken word "Mayday"
C.An International Code Signal of N.C.
D.The firing of green star rockets or shells
A.A triangular flag above or below a ball
B.The International Code Signal of distress indicated by "JV"
C.A green smoke signal
D.Flames on the vessel as from a burning tar barrel
A.Class A EPIRBs
B.Class B EPIRBs
C.L-Band EPIRBs
D.Category I EPIRBs
A.At one hour intervals
B.At half hour intervals
C.Only when there is a chance of their being seen by rescue vessels
D.Immediately upon abandoning the vessel
最新試題
When sending a DSC call，the vessel’s（）.
What is meant by the term “radio silence”?（）
When a vessel signals her distress by means of a gun or other explosive signal，the firing should be at intervals of approximately（）.
Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
What is the fundamental purpose for imposing radio silence? （）
Distress signals may be（）.
The signal to guide vessels in distress，which indicates，“This is the best place to land” is the（）.
Which signal is detected as originating from a SART?（）
When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）
Three short blasts of the whistle means（）.