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
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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
Aids to navigation marking the intracoastal waterway can be identified by（）.
An all-round flashing yellow light may be exhibited by a(n)（）.
All personnel on board a vessel should be familiar with the rescue boat’s（）.
All of the following are part of the fire triangle EXCEPT（）.
An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes? （）
An advantage of the Christmas Tree towing method is to（）.
All of the following vessels are “restricted in their ability to maneuver” EXCEPT a vessel （）.
An azimuth angle for a body is measured from the（）.
In handling break bulk hazardous materials，it is forbidden to use（）.
An icebreaker may use the code letter “K” to remind ships of their obligation to listen continuously on their radio. This signal may be made by any of the following EXCEPT（）.