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

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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
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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