單項(xiàng)選擇題Lighted white and orange buoys must show which color light?()

A.Orange
B.White
C.Red
D.Alternating yellow and white


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2.單項(xiàng)選擇題At the magnetic equator there is no induced magnetism in the vertical soft iron because().

A.the lines of force cross the equator on a 0°-180°alignment
B.the quadrantal error is 0°
C.there is no vertical component of the Earth's magnetic field
D.the intercardinal headings have less than 1°

3.單項(xiàng)選擇題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

4.單項(xiàng)選擇題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

5.單項(xiàng)選擇題A relative bearing is always measured from().

A.true north
B.magnetic north
C.the vessel's beam
D.the vessel's head