Chart/Publication correction record Card system ensures that every chart is properly corrected（）.<br>A:in use<br>B:prior to use<br>C:after use<br>D:When chart received on board

Chart/Publication correction record Card system ensures that every chart is properly corrected（）.
A:in use
B:prior to use
C:after use
D:When chart received on board

出自：海船船员证

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