默认题库 - 地文航海

单选题

A line of position is（）.

A. a line connecting two charted objects
B. a line on some point of which the vessel may be presumed to be located
C. the position of your vessel
D. not used in a running fix

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单选题

A single line of position combined with a dead-reckoning position results in a(n)（）.

A. running fix
B. fix
C. estimated position
D. assumed positio

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单选题

Lighted white and orange buoys must show which color light?（）

A. Orange
B. White
C. Red
D. Alternating yellow and white

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单选题

Preferred channel buoys indicate the preferred channel to transit by（）.

A. odd or even numbers
B. the color of their top band
C. the location of the buoy in the channel junction
D. the buoy's light rhythm

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单选题

The period of a lighted aid to navigation refers to the（）.

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

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单选题

This is（）where we shall anchor.

A. the light-house
B. the anchorage
C. the pilot station
D. the light-buoy

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单选题

What is the light characteristic of a lighted，preferred-channel buoy? （）

A. Group flashing
B. Composite group flashing
C. Interrupted quick flashing
D. Fixed and flashing

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单选题

When entering from seaward，a buoy displaying a single-flashing red light would indicate （）.

A. a junction with the preferred channel to the left
B. a sharp turn in the channel to the right
C. the starboard side of the channel
D. a wreck to be left on the vessel's port side

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单选题

When making landfall at night，you can determine if a light is a major light or an offshore buoy by（）.

A. the intensity of the light
B. checking the period and characteristics against the Light List
C. the color，because the buoy will have only a red or a green light
D. Any of the above can be used to identify the light

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单选题

The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the（）.

A. Set
B. Frequency
C. Period
D. Functio

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