The Sailing Directions contain information on （）.<br>A:required navigation lights<br>B:lifesaving equipment standards<br>C:casualty reporting procedures<br>D:currents in various locations

The Sailing Directions contain information on （）.
A:required navigation lights
B:lifesaving equipment standards
C:casualty reporting procedures
D:currents in various locations

出自：海船船员证

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