Coast Guard approved buoyant work vests（）.<br>A:may be substituted for 10 percent of the required life preservers<br>B:should be stowed adjacent to lifeboats and emergency stations<br>C:may be used by boat crews and line handlers during lifeboat drills<br>D:should be used when carrying out duties near a weather deck's edge

Coast Guard approved buoyant work vests（）.
A:may be substituted for 10 percent of the required life preservers
B:should be stowed adjacent to lifeboats and emergency stations
C:may be used by boat crews and line handlers during lifeboat drills
D:should be used when carrying out duties near a weather deck's edge

出自：海船船员证

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