A.litmus paper
B.a combustible gas indicator
C.an oxygen breathing apparatus
D.an oxygen indicator
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A.that the vessel is anchored
B.to request the draw span of a bridge to be opened
C.of distress
D.that the vessel is broken down and drifting
A.have someone standing by
B.make sure there is sufficient air within the locker
C.de-energize the windlass
D.All of the above
最新試題
Which mooring line is likely to undergo the most strain when docking a ship under normal conditions?（）
In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）
I hope you don’t mind（）the radar for us in a short time.
The ship is not very stable，please（）when making a turn.
Good anchorage may be obtained anywhere in this water area，the bottom being generally mud and sand，vessel may have（）.