The principal purpose of adjustment of the magnetic com……

单项选择题（）the repeater compass with the master compass，please.

A.Similize
B.Clock
C.Synchronize
D.Position

单项选择题My gyro-compass error is（）.

A.east two degrees
B.two degrees east
C.two east degrees
D.two-degrees east

单项选择题There is a possibility that small vessel，ice and other floating objects may not be（）by radar at an adequate range.

A.reflect
B.shown
C.detected
D.defected

单项选择题Which of the following radar contacts will present the most immediate danger?（）.

A.A vessel on the starboard bow whose bearing is changing and range is decreasing
B.A vessel on the starboard bow whose bearing is steady and range is increasing
C.A vessel on the port bow whose bearing is steady and range is decreasing
D.A vessel on the port bow whose bearing is changing to the left and range decreasing