A.After determining that the frequency or channel appears to be no longer in use
B.After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C.Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D.If，in the Master's opinion，communications on that frequency will interfere with emergency communications
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A.After determining that the frequency or channel appears to be no longer in use
B.After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C.After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D.Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
A.10 minutes
B.1 minute
C.1 hour
D.3 minutes
A.To ensure that interference to proprietary communications is minimized
B.To ensure that only voice communications can be effected on the distress frequency or channel
C.To ensure that a distressed vessel will have a "window" twice each hour for transmitting routine messages
D.To ensure that interference on a particular frequency or channel to communications concerning emergency traffic is minimized
A.1492 kHz
B.1892 kHz
C.2082 kHz
D.2182 kHz
A.Red flares or red rockets
B.Continuous sounding of fog signaling apparatus
C.International Code Flags "November" and "Charlie"
D.Basket hanging in the rigging
最新試題
What is the fundamental purpose for imposing radio silence? （）
When can routine communications be resumed when radio silence has been imposed?（）
Which condition represents the appropriate time for setting off distress flares and rockets? （）
Distress signals may be（）.
If you are transmitting a distress message by radiotelephone you should（）.
Several merchant ships are arriving at the scene of a distress incident. One of the them must assume the duties of the Coordinator Surface Search (CSS). Which of the following statements is TRUE? （）
When a vessel signals her distress by means of a gun or other explosive signal，the firing should be at intervals of approximately（）.
Distress flares and smoke signals for small passenger vessels（）.
When sending a DSC call，the vessel’s（）.
Which is NOT a distress signal? （）