单选题Quadrantal error in a gyrocompass has its GREATEST effect（）.Ain high latitudesBnear the equatorCon north or south headingsDon intercardinal headings
单选题
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
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