单项选择题

A compass card without north-seeking capability that is used for relative bearings is a(n)（）.

A.bearing circle
B.pelorus
C.bearing bar
D.alidade

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单项选择题

（）is on the panel of DF.

A.RINGS INT
B.SWEEP INT
C.REPEATER
D.GONIOMETER

单项选择题

Quadrantal error in a gyrocompass has its GREATEST effect（）.

A.in high latitudes
B.near the equator
C.on north or south headings
D.on intercardinal headings

单项选择题

As a vessel changes course to starboard，the compass card in a magnetic compass（）.

A.remains aligned with compass north
B.also turns to starboard
C.first turns to starboard then counterclockwise to port
D.turns counterclockwise to port