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

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

出自：海船船员证

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