单项选择题
The light on a life jacket must be replaced（）.
A.when the power source is replaced
B.each year after installation
C.every six months
D.when it is no longer serviceable
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相关考题
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单项选择题
The lifesaving equipment on all vessels shall be（）.
A.inspected weekly
B.stowed in locked compartments
C.readily accessible
D.tested yearly -
单项选择题
The life jackets on all vessels shall be（）.
A.inspected weekly
B.worn at all times
C.readily available
D.tested yearly -
单项选择题
The last shot of an anchor cable is usually painted（）.
A.white
B.international orange
C.yellow
D.red
