单项选择题
A.bearing circle B.pelorus C.bearing bar D.alidade
（）is on the panel of DF.A.RINGS INTB.SWEEP INTC.REPEATE...
单项选择题（）is on the panel of DF.
A.RINGS INT B.SWEEP INT C.REPEATER D.GONIOMETER
Quadrantal error in a gyrocompass has its GREATEST effe...
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
As a vessel changes course to starboard，the compass car...
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
