單項(xiàng)選擇題

All of the following are distress signals under the Rules EXCEPT（）.

A.International Code Signal AA
B.orange-colored smoke
C.red flares
D.the repeated raising and lowering of outstretched arms

你可能感興趣的試題

單項(xiàng)選擇題

All of the following are distress signals EXCEPT（）.

A.the continuous sounding of any fog signal apparatus
B.giving five or more short and rapid blasts of the whistle
C.firing a gun at intervals of about a minute
D.a barrel with burning oil in it，on deck

單項(xiàng)選擇題

After putting on a self-contained breathing apparatus，you open the air supply and hear a continuous ringing of a bell. What does this mean?（）.

A.The unit is working properly
B.The face mask is not sealed properly
C.The air bottle needs to be refilled
D.The air supply hose has a leak

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All of the following are distress signals under the Rules EXCEPT（）.

你可能感興趣的試題

All of the following are distress signals EXCEPT（）.

After putting on a self-contained breathing apparatus，you open the air supply and hear a continuous ringing of a bell. What does this mean?（）.

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