A.the rotation of the earth on its axis
B.convection currents caused by differences in radiant heating between equatorial and polar regions
C.mountain ranges
D.All of the above
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A.the letters ICW after the aid's number or letter
B.yellow stripes，squares，or triangles marked on them
C.white retroreflective material
D.the light characteristic and color for lighted aids
A.Bayou Sara
B.Baton Rouge
C.Head of Passes
D.Red River Landing
A.Thimble Shoal Main Channel or the South Auxiliary Channel
B.Any of the channels but keep to the right hand side
C.The South Auxiliary Channel
D.Thimble Shoal Main Channel
A.Any span is navigable
B.Northbank or Southbank
C.Southbank span only
D.Northbank span only
A.Right Descending Bank span
B.Left Descending Bank span
C.Center span
D.Water is equal under all spans
最新試題
An authorized light to assist in the identification of submarines operating on the surface is a(n)（）.
An engine compartment gasoline fire requires which type of extinguisher?（）
An advantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it（）.
An advantage of the Christmas Tree towing method is to（）.
In handling break bulk hazardous materials，it is forbidden to use（）.
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.
An airplane should NOT send which signal in reply to a surface craft?（）
An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter “E” (Echo) to signify that “（）”.
All of the following information concerning lighted aids to navigation may be read directly from the Light List EXCEPT the（）.
An all-round flashing yellow light may be exhibited by a(n)（）.