Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.<br>A:accurate only in the Polar regions<br>B:accurate electronic servomechanisms<br>C:hand operated<br>D:accurate only if the vessel is underway

Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
A:accurate only in the Polar regions
B:accurate electronic servomechanisms
C:hand operated
D:accurate only if the vessel is underway

出自：海船船员证

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