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
Antiseptics are used principally to（）.
An “on-load” release system on a survival craft means the cable can be released（）.
All towing vessels of 26 feet or longer while navigating are required to carry which item? （）
Explosive and flammable gasses are most likely to be encountered on a vessel（）.
An entry of water，gas，oil，or other formation fluid into the wellbore is called a（）.
All of the following are part of the fire triangle EXCEPT（）.
All personnel on board a vessel should be familiar with the rescue boat’s（）.
Air circulation is caused or affected by（）.
All of the following vessels are “restricted in their ability to maneuver” EXCEPT a vessel （）.
An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.