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
Which position includes the effects of wind and current（）.
Restricted areas at locks and dams are indicated by（）.
The recording fathometer produces a graphic record of the（）.
When entering a channel from seaward，the numbers on buoys（）.
When entering from seaward，a buoy displaying a single-flashing red light would indicate （）.
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.
You should plot your dead reckoning position（）.
The equator is（）.
When making landfall at night，you can determine if a light is a major light or an offshore buoy by（）.
（） is a defined area within which ships must use particular caution and should follow the recommended direction of traffic flow.