单项选择题
A.buoys close at hand B.fixed known objects on shore C.buoys at a distance D.All of the above
A single line of position combined with a dead-reckonin...
单项选择题A single line of position combined with a dead-reckoning position results in a(n)（）.
A.running fix B.fix C.estimated position D.assumed position
A relative bearing is always measured from（）.A.true nor...
单项选择题A relative bearing is always measured from（）.
A.true north B.magnetic north C.the vessel's beam D.the vessel's head
A position that is obtained by using two or more inters...
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)（）.
A.estimated position B.fix C.running fix D.dead-reckoning position
