单项选择题
All portable fire extinguishers must be capable of being（）.
A.carried by hand to a fire
B.carried or rolled to a fire
C.recharged in the field
D.used on class "B" fires
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A.boarding and operating procedure
B.maintenance schedules
C.navigational systems
D.fuel consumption rates -
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All OSV personnel should be familiar with survival craft（）.
A.boarding and operating procedures
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All of the following vessels are “restricted in their ability to maneuver” EXCEPT a vessel （）.
A.laying a pipeline
B.dredging
C.mineclearing
D.not under command
