单项选择题
You hear on the radiotelephone the word “Securite” spoken three times. This indicates that（）.
A.a message about the safety of navigation will follow
B.a message of an urgent nature about the safety of a ship will follow
C.the sender is in distress and requests immediate assistance
D.you should secure your radiotelephone
相关考题
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单项选择题
You have a large，broken-down vessel in tow with a wire rope and anchor cable towline. Both vessels have made provision for slipping the tow in an emergency; however，unless there are special circumstances（）.
A.the towing vessel should slip first
B.the vessel towed should slip first
C.they should slip simultaneously
D.either vessel may slip first -
单项选择题
You are underway and pass by a lighthouse. Its light，which was white since you first sighted it，changes to red. This means（）.
A.the light is characterized as alternately flashing
B.the lighthouse has lost power and has switched to emergency lighting
C.it is the identifying light characteristic of the lighthouse
D.you have entered an area of shoal water or other hazard -
单项选择题
You are the first vessel to arrive at the scene of a distress. Due to the volume of traffic on the radio，you are unable to communicate with the vessel in distress. Which action should you take?（）
A.Switch to flag hoists
B.Broadcast "Seelonce Distress"
C.Broadcast "Charlie Quebec-Mayday-Quiet"
D.Key the microphone three times in quick succession
