A.increase the towing hawser's catenary and provide more spring
B.reduce catenary，allow operation in shallower water，and to release one barge without breaking up the entire tow
C.enable one tug and its crew without any outside assistance to make up or break down the tow
D.provide rapid delivery of logs from the northwestern United States to Hawaiian sawmills
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A.only when the load is taken off the cable
B.only when there is a load on the cable
C.only when activated by the controls at the lowering station
D.at any time
A.Cirrus
B.Cumulus
C.Stratus
D.Nimbus
A.a mattress
B.spilled liquids such as oil or paint
C.high voltage electrical gear
D.a trash can
A.satellite communications
B.navigational information
C.weather information
D.position reporting service
A.At least two lifeboats
B.A radiotelephone
C.A radio direction finder
D.None of the above
最新試題
An icebreaker displaying a flag hoist which consists of the code letters “WO” (Whiskey Oscar) is indicating that（）.
An example of a grade B product is（）.
An all-round flashing yellow light may be exhibited by a(n)（）.
All towing vessels of 26 feet or longer while navigating are required to carry which item? （）
All portable fire extinguishers must be capable of being（）.
An advantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it（）.
All OSV personnel should be familiar with survival craft（）.
An “atoll cloud” forming over an island due to heating of the land during the daytime would be which type? （）
In handling break bulk hazardous materials，it is forbidden to use（）.
An engine compartment gasoline fire requires which type of extinguisher?（）