单项选择题
A.Steering a sinuous course
B.Steering a zig-zag course
C.Turning on all available deck lights at night
D.Dumping debris over the side to make a trail to your vessel
单项选择题 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?（）.
单项选择题 Acknowledgement by you of receipt of a distress message from a vessel which，beyond any possible doubt，is not in your vicinity and is a long distance away must be made when（）.
单项选择题 If you are transmitting a distress message by radiotelephone you should（）.