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

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

单项选择题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

单项选择题All OSV personnel should be familiar with survival craft（）.

A.boarding and operating procedures
B.maintenance schedule
C.navigational systems
D.fuel consumption rates

单项选择题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

单项选择题All of the following information concerning lighted aids to navigation may be read directly from the Light List EXCEPT the（）.

A.location
B.height of light above water
C.luminous range
D.light characteristics