单选题If an airplane circles a vessel 3 times，crosses the vessel’s course close ahead while rocking the wings，and heads off in a certain direction，what does this indicate（）.AThe plane is in distress and will have to ditchBThe plane is going to drop a package and wishes the vessel to recover itCSomeone is in distress in that direction and the vessel should follow and assistDThere is danger ahead and the best course is indicated by the direction of the aircraft
单选题
If an airplane circles a vessel 3 times，crosses the vessel’s course close ahead while rocking the wings，and heads off in a certain direction，what does this indicate（）.
A
The plane is in distress and will have to ditch
B
The plane is going to drop a package and wishes the vessel to recover it
C
Someone is in distress in that direction and the vessel should follow and assist
D
There is danger ahead and the best course is indicated by the direction of the aircraft
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