A.untrue
B.impossible
C.suspectful
D.unimportant
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A.date of construction or establishment
B.length of time between flashes of the light
C.time required for the longest flash of each cycle
D.time required for the light to complete each cycle
A.under existing visibility conditions
B.under perfect visibility
C.with ten miles visibility
D.with fifteen miles visibility
A.nominal range
B.luminous range
C.charted range
D.geographic range
A.glare from background lighting
B.existing visibility conditions
C.elevation of the light
D.observer's height of eye
A.flashing red lights upstream and fixed red lights downstream
B.yellow unlighted buoys
C.signs and/or flashing red lights
D.red daymarks upstream and green daymarks downstream
最新試題
The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the（）.
（） is not likely to be a methods of Traffic Separation.
The four standard light colors used for lighted aids to navigation are red，green，white，and （）.
What area of the earth cannot be shown on a standard Mercator chart（）.
When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation（）.
You have been informed that dredging operations may be underway in your vicinity.Which buoy indicates the dredging area（）.
When using a buoy as an aid to navigation which of the following should be considered?（）
When latitude and longitude are used，these shall be expressed in（）（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich.
In very high latitudes，the most practical chart projection is the（）.
The equator is（）.