單項選擇題

Dring a period of “whiteout”，you should expect which of the following（）.

A.Snowfall or blowing snow
B.Lack of ability to estimate distance
C.Harsh contrast between sun-illuminated snow cover and the background
D.Hazy horizons with extensive mirage effects

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單項選擇題

Day-shapes must be displayed（）.

A.Between sunset and sunrise
B.Only between 8 AM and 4 PM
C.During daylight hours in any visibility
D.During daylight hours in unrestricted visibility only

單項選擇題

At night，a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two（）.

A.red lights
B.red lights and two white lights
C.red lights with a white light in between
D.white lights with a red light in between

Dring a period of “whiteout”，you should expect which of the following（）.

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Day-shapes must be displayed（）.

At night，a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two（）.

Dring a period of “whiteout”，you should expect which of the following（）.

At night，a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two（）.