单项选择题
You determine your vessel’s position by taking a range and bearing to a buoy.Your position will be plotted as a（n）（）.
A.Running fix B.Fix C.Dead-reckoning position D.Estimated position
单项选择题 Which statement concerning current is TRUE（）.
单项选择题 Which position includes the effects of wind and current（）.
单项选择题 Which of the following are data layer categories to be displayed on ECDIS（）．
