An “atoll cloud” forming over an island due to heating of the land during the daytime would be which type? （）

单项选择题An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.

A.a mattress
B.spilled liquids such as oil or paint
C.high voltage electrical gear
D.a trash can

单项选择题AMVER is a system which provides（）.

A.satellite communications
B.navigational information
C.weather information
D.position reporting service

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

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