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
您可能感興趣的試卷
你可能感興趣的試題
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
A.At least two lifeboats
B.A radiotelephone
C.A radio direction finder
D.None of the above
最新試題
An example of a grade C product is（）.
An “on-load” release system on a survival craft means the cable can be released（）.
Antiseptics are used principally to（）.
Explosive and flammable gasses are most likely to be encountered on a vessel（）.
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)（）.
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 all-round flashing yellow light may be exhibited by a(n)（）.
An anchored vessel is servicing an aid to navigation and is restricted in her ability to maneuver. Which lights will she show? （）