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
What is the fundamental purpose for imposing radio silence? （）
Which signal is recognized as a distress signal?（）
The signal to guide vessels in distress，which indicates，“This is the best place to land” is the（）.
Which condition represents the appropriate time for setting off distress flares and rockets? （）
Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
Wat is NOT required in the radiotelephone log?（）
When should distress flares and rockets be used? （）
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?（）
The service life of distress signals must be not more than（）.
When can routine communications be resumed when radio silence has been imposed?（）