單項(xiàng)選擇題How is variation indicated on a small-scale nautical chart?（）

A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts


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1.單項(xiàng)選擇題Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.

A.accurate only in the Polar regions
B.accurate electronic servomechanisms
C.hand operated
D.accurate only if the vessel is underway

2.單項(xiàng)選擇題Error may be introduced into a magnetic compass by（）.

A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above

4.單項(xiàng)選擇題Deviation which is maximum on intercardinal compass headings may be removed by the（）.

A.Flinders bar
B.transverse magnets
C.fore-and-aft magnets
D.soft iron spheres on the sides of the compass

5.單項(xiàng)選擇題Deviation is the angle between the（）.

A.true meridian and the axis of the compass card
B.true meridian and the magnetic meridian
C.magnetic meridian and the axis of the compass card
D.axis of the compass card and the degaussing meridian