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
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? （）
An all-round flashing yellow light may be exhibited by a(n)（）.
All of the following vessels are “restricted in their ability to maneuver” EXCEPT a vessel （）.
All Loran-C transmitting stations are equipped with cesium frequency standards which permit （）.
An “atoll cloud” forming over an island due to heating of the land during the daytime would be which type? （）
In handling break bulk hazardous materials，it is forbidden to use（）.
An example of a grade B product is（）.
An anchored vessel is servicing an aid to navigation and is restricted in her ability to maneuver. Which lights will she show? （）
An engine compartment gasoline fire requires which type of extinguisher?（）