A.A vessel towed
B.A vessel not under command and unable to maneuver
C.A vessel anchored giving warning of her position
D.A vessel stopped dead in the water
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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
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
最新試題
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
All fog signals shall be sounded every two minutes with the exception of a vessel（）.
A vessel being towed astern，where the length of the tow exceeds 200 meters，will exhibit （）.
Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?（）
By night，you sight the lights of a vessel engaged in underwater operations. If an obstruction exists on the port side of the vessel，it will be marked by（）.
A vessel towing where the tow prevents her from changing course shall carry（）.
An all-round flashing yellow light may be exhibited by a(n)（）.
A red triangular daymark marks（）.
As defined in the Rules，a towing light is a yellow light having the same characteristics as a(n)（）.
The prohibition against displaying lights which may be confused with required navigation lights applies（）.