A.the period of darkness exceeds the period of light
B.there is only a partial eclipse of the light
C.the periods of light and darkness are equal
D.the period of light exceeds the period of darkness
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A.yellow lights at each end
B.two red lights in a vertical line
C.a black ball
D.a diamond shape
A.vessel not under command
B.air cushion vessel in the nondisplacement mode
C.vessel towing a submerged object
D.vessel engaged in diving operations
A.underway or making way
B.under sail or under tow
C.anchored or aground
D.not under command or restricted in her ability to maneuver
A.During the hours of darkness
B.At all times when underway
C.From sunset to sunrise and restricted visibility
D.Sunrise to sunset
A.only the lights for a vessel towing
B.only the lights for a vessel restricted in her ability to maneuver
C.the lights for a towing vessel and the lights for a vessel restricted in her ability to maneuver
D.the lights for a towing vessel and the lights for a vessel not under command
最新試題
A vessel towing where the tow prevents her from changing course shall carry（）.
At sea，you are approaching a small vessel and see that it has the signal flag P hoisted. What should you do?（）.
A towing light is a yellow light having the same characteristics as a(n)（）
Lighted information markers show（）.
Approaching an anchorage in fog，you hear one short，one prolonged，and one short blast in that sequence on a ship’s whistle． This indicates（）.
As defined in the Rules，a towing light is a yellow light having the same characteristics as a(n)（）.
A single towing light will be carried above a vessel’s sternlight（）.
The prohibition against displaying lights which may be confused with required navigation lights applies（）.
Navigation lights must be displayed in all weathers from sunset to sunrise. They also（）.
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.