单选题The most accurate method of determining gyrocompass error while underway is by（）.AComparing the gyro azimuth of a celestial body with the computed azimuth of the bodyBComparing the gyro heading with the magnetic compass headingCDetermining from the chart the course made good between celestial fixesDIt cannot be determined accurately at sea due to drift of unknown currents
单选题
The most accurate method of determining gyrocompass error while underway is by（）.
A
Comparing the gyro azimuth of a celestial body with the computed azimuth of the body
B
Comparing the gyro heading with the magnetic compass heading
C
Determining from the chart the course made good between celestial fixes
D
It cannot be determined accurately at sea due to drift of unknown currents
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