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
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相关考题
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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 -
单项选择题
A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n)（）.
A.dead reckoning position
B.estimated position
C.fix
D.None of the above -
单项选择题
A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n)（）.
A.running fix
B.dead-reckoning position
C.fix
D.estimated position
