A.Three lights in a vertical line，the highest and lowest red and the middle white，and anchor lights
B.Three lights in a vertical line，the highest and lowest red and the middle white，ONLY
C.Anchor lights ONLY
D.Anchor lights and sidelights ONLY
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A.vessel laying cable
B.vessel towing a submerged object
C.vessel not under command
D.air cushion vessel
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
最新試題
Antiseptics are used principally to（）.
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)（）.
An aneroid barometer on a boat should always be（）.
All of the following vessels are “restricted in their ability to maneuver” EXCEPT a vessel （）.
An icebreaker displaying a flag hoist which consists of the code letters “WO” (Whiskey Oscar) is indicating that（）.
An example of an anchor which has a stock is a（）.
All of the following information concerning lighted aids to navigation may be read directly from the Light List EXCEPT the（）.
Explosive and flammable gasses are most likely to be encountered on a vessel（）.
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? （）