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
An advantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it（）.
In respect of carrier’s liabilities，responsibilities，rights and immunities the（）contained in the International Convention for the Unification of Certain Rules Relating to Bills of Lading，signed at Brussels on August 25，1924，shall be applied.
In handling break bulk hazardous materials，it is forbidden to use（）.
Explosive and flammable gasses are most likely to be encountered on a vessel（）.
Aids to navigation marking the intracoastal waterway can be identified by（）.
All towing vessels of 26 feet or longer while navigating are required to carry which item? （）
An aneroid barometer on a boat should always be（）.
An “atoll cloud” forming over an island due to heating of the land during the daytime would be which type? （）
AMVER is a system which provides（）.
An airplane should NOT send which signal in reply to a surface craft?（）