A.making headway
B.making no headway
C.moored to a buoy
D.at anchor
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A.Whether she is normally a fishing or a trawling vessel
B.Her gross tonnage
C.Her length
D.The type of gear she carries
A.a diamond shape
B.two cones，apexes together
C.a black ball
D.one cone，apex upward
A.vessel being towed
B.fishing vessel engaged in trawling
C.vessel at anchor warning of her location
D.power-driven pilot vessel on station underway
A.flashes at regular intervals at a frequency of 120 flashes or more per minute
B.is yellow in color
C.is visible over an arc of the horizon of not less than 180°nor more than 225°
D.All of the above
A.A flashing amber light
B.A fixed red light
C.A white flag raised and lowered vertically
D.A flashing white light
最新試題
A towing light，according to the Rules，is a（）.
Lighted information markers show（）.
On entering from seaward，a starboard side daymark will（）.
The prohibition against displaying lights which may be confused with required navigation lights applies（）.
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?（）
Daymarks marking the starboard side of the channel when going towards the sea are（）.
According to the Rules，when should lights be displayed?（）.
The duration of a prolonged blast of the whistle is（）.
A single towing light will be carried above a vessel’s sternlight（）.
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（）.