Because the actual center of some planets may differ from the observed center，the navigator applies a correction known as the（）.<br>A:phase correction<br>B:refraction correction<br>C:semidiameter correction<br>D:augmentation correction

Because the actual center of some planets may differ from the observed center，the navigator applies a correction known as the（）.
A:phase correction
B:refraction correction
C:semidiameter correction
D:augmentation correction

出自：海船船员证

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