A.Opening and closing the throttle
B.Rocking the wings
C.Flashing the navigational lights off and on
D.Flashing Morse T
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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
A.a mattress
B.spilled liquids such as oil or paint
C.high voltage electrical gear
D.a trash can
最新試題
AMVER is a system which provides（）.
Aids to navigation marking the intracoastal waterway can be identified by（）.
An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.
All OSV personnel should be familiar with survival craft（）.
Antiseptics are used principally to（）.
All of the following information concerning lighted aids to navigation may be read directly from the Light List EXCEPT the（）.
An inflatable liferaft is floating in its container，attached to the ship by its painter，as the ship is sinking rapidly. Which action should be taken with respect to the liferaft container? （）
An icebreaker displaying a flag hoist which consists of the code letters “WO” (Whiskey Oscar) is indicating that（）.
An “atoll cloud” forming over an island due to heating of the land during the daytime would be which type? （）
An entry of water，gas，oil，or other formation fluid into the wellbore is called a（）.