A.a floodlight
B.two red lights in a vertical line
C.a single red light
D.any visible lights
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A.Proceed on present course and speed since the vessel is stopped and making no way through the water
B.Keep clear of the vessel because it has a diver down
C.Attempt to call the vessel on VHF radiotelephone because someone on board requires medical assistance
D.Approach with caution because the vessel is a fishing vessel and its nets are fouled on an obstruction
A.masthead light
B.all-round light
C.sidelight
D.sternlight
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
最新試題
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?（）.
A single towing light will be carried above a vessel’s sternlight（）.
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
Lighted information markers show（）.
As defined in the Rules，a towing light is a yellow light having the same characteristics as a(n)（）.
Environmental loading consists of the forces caused by wind，waves，and（）.
Entering from seaward，triangular-shaped daymarks are used to mark（）.
A vessel being towed astern，where the length of the tow exceeds 200 meters，will exhibit （）.
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（）.
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?（）