单项选择题
By regulation，life preservers aboard an uninspected towing vessel must be（）.
A.readily accessible
B.securely stowed
C.stored in sealed containers
D.stowed with the emergency provisions
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相关考题
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单项选择题
As you hold a piece of manila line vertically in front of you，the strands run from the lower left to the upper right. Which type of line is this?（）
A.Right-hand laid
B.Cable-laid
C.Sennet-laid
D.Water-laid -
单项选择题
An oxygen indicator can be used to determine if there is（）.
A.sufficient oxygen in a compartment to support life
B.combustible gases present
C.hydrogen gas present
D.All of the above -
单项选择题
An on-load release system on a survival craft means the cable can be released（）.
A.only when the load is taken off the cable
B.only when there is a load on the cable
C.only when activated by the controls at the lowering station
D.at any time
