单项选择题
A vessel’s position should be plotted using bearings of（）.
A.buoys close at hand B.fixed known objects on shore C.buoys at a distance D.All of the above
单项选择题 A single line of position combined with a dead-reckoning position results in a(n)（）.
单项选择题 A relative bearing is always measured from（）.
单项选择题 A position that is obtained by using two or more intersecting lines of position，taken at nearly the same time，is a(n)（）.
