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
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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
A.Only when there is a chance of their being seen by rescue vessels
B.At half hour intervals
C.At one hour intervals
D.Immediately upon abandoning the vessel
最新試題
If you log a distress message，it must include the（）.
Wat is NOT required in the radiotelephone log?（）
What is NOT a distress signal?（）
Which action should you take after sending a false distress alert on VHF?（）
How is “radio silence” imposed?（）
When a vessel signals her distress by means of a gun or other explosive signal，the firing should be at intervals of approximately（）.
Three short blasts of the whistle means（）.
Which categories of NAVTEX messages may not be selectively rejected through receiver programming?（）
What is the fundamental purpose for imposing radio silence? （）
Upon receipt of a distress message，a merchant vessel is bound to proceed to the scene of the distress. Under which of the following cases would this NOT be true?（）