單項(xiàng)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

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單項(xiàng)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

單項(xiàng)選擇題

A yellow signal，floating in the air from a parachute，about 300 feet above the water，indicates that a submarine（）.

A.will be coming to periscope depth
B.will be coming to the surface
C.is on the bottom in distress
D.is in distress and will try to surface

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Day-shapes must be displayed（）.

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

A yellow signal，floating in the air from a parachute，about 300 feet above the water，indicates that a submarine（）.

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A yellow signal，floating in the air from a parachute，about 300 feet above the water，indicates that a submarine（）.