Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are（）.
- Aaccurate only in the Polar regions
- Baccurate electronic servomechanisms
- Chand operated
- Daccurate only if the vessel is underway
问题
Gyrocompass repeaters reproduce the in
参考解析：
分类：航海仪器使用说明书题库
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