A.vessel laying cable
B.vessel towing a submerged object
C.vessel not under command
D.air cushion vessel
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A.Opening and closing the throttle
B.Rocking the wings
C.Flashing the navigational lights off and on
D.Flashing Morse T
A.has long life
B.is light weight
C.absorbs shock
D.has fine adjustment
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
最新試題
Aids to navigation marking the intracoastal waterway can be identified by（）.
An aneroid barometer on a boat should always be（）.
An airplane should NOT send which signal in reply to a surface craft?（）
All OSV personnel should be familiar with survival craft（）.
An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter “E” (Echo) to signify that “（）”.
An “on-load” release system on a survival craft means the cable can be released（）.
An example of an anchor which has a stock is a（）.
An icebreaker displaying a flag hoist which consists of the code letters “WO” (Whiskey Oscar) is indicating that（）.
An entry of water，gas，oil，or other formation fluid into the wellbore is called a（）.
Explosive and flammable gasses are most likely to be encountered on a vessel（）.