单项选择题
Which vessel may show three lights in a vertical line，the top and bottom being red and the middle being white? （）
A.A vessel engaged in diving operations B.A pilot vessel C.A vessel trawling D.All of the above
单项选择题 Which publication should you check for complete information on Puget Sound weather conditions? （）
单项选择题 When the Pilot is embarked he or she （）.
单项选择题 When the movement of engine is no longer required the pilot usually gives the order like this（） .
