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?（）<br>A:The plane is in distress and will have to ditch<br>B:The plane is going to drop a package and wishes the vessel to recover it<br>C:Someone is in distress in that direction and the vessel should follow and assist<br>D:There is danger ahead and the best course is indicated by the direction of the aircraft

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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