单项选择题

All towing vessels of 26 feet or longer while navigating are required to carry which item? （）

A.At least two lifeboats
B.A radiotelephone
C.A radio direction finder
D.None of the above

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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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All personnel on board a vessel should be familiar with the rescue boat’s（）.

A.boarding and operating procedure
B.maintenance schedules
C.navigational systems
D.fuel consumption rates
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