A.has long life
B.is light weight
C.absorbs shock
D.has fine adjustment
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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
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
最新試題
An anchored vessel is servicing an aid to navigation and is restricted in her ability to maneuver. Which lights will she show? （）
An example of a grade B product is（）.
Aids to navigation marking the intracoastal waterway can be identified by（）.
An aneroid barometer on a boat should always be（）.
All of the following are part of the fire triangle EXCEPT（）.
An engine compartment gasoline fire requires which type of extinguisher?（）
An advantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it（）.
All personnel on board a vessel should be familiar with the rescue boat’s（）.
An example of an anchor which has a stock is a（）.
An example of a grade C product is（）.