A.masthead light
B.all-round light
C.sidelight
D.sternlight
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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
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
最新試題
A towing light is a yellow light having the same characteristics as a(n)（）
A red triangular daymark marks（）.
A vessel is fishing at anchor on the high seas. Which of the following day signals should she display if she has gear extending out over 150 meters horizontally from the vessel?（）.
During the day，a vessel with a tow over 200 meters in length will show（）.
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?（）
A vessel towing where the tow prevents her from changing course shall carry（）.
A power-driven vessel，when towing astern，shall show（）.
If your vessel were proceeding down river (descending)，a green square marker with a green reflector border on the right bank would be a（）.
The duration of a prolonged blast of the whistle is（）.
A vessel towing is showing three forward white masthead lights in a vertical line. This means that the length of the（）.