单项选择题
All of the following are distress signals under the Rules EXCEPT（）.
A.a green star signal
B.orange-colored smoke
C.red flares
D.the repeated raising and lowering of outstretched arms
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相关考题
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单项选择题
What is NOT a distress signal?（）.
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 -
单项选择题
What would NOT be a distress signal?（）.
A.MAYDAY sent by radiotelephone
B.Continuous sounding of fog horn
C.Green star shells fired from a launcher
D.Square flag and ball in a vertical line -
单项选择题
When two vessels are in immediate danger of collision，the stand-on vessel must（）.
A.abandon ship
B.assist in taking whatever action is necessary to avoid collision
C.hold course and speed
D.sound a distress signal
