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
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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
A.A rapid ringing of a bell for 5 seconds every two minutes
B.A whistle signal of one short，one prolonged，and one short blast
C.A prolonged blast of the whistle at intervals not to exceed one minute
D.A rapid ringing of a bell for 5 seconds，preceded and followed by three separate and distinct strokes on the bell
最新試題
On entering from seaward，a starboard side daymark will（）.
A towing light，according to the Rules，is a（）.
A tug is towing three manned barges in line in fog. The first vessel of the tow should sound （）.
The duration of a prolonged blast of the whistle is（）.
A single towing light will be carried above a vessel’s sternlight（）.
A safe water daymark has what shape? （）
During the day，a vessel with a tow over 200 meters in length will show（）.
A power-driven vessel towing another vessel astern (tow less than 200 meters) shall 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（）.
The prohibition against displaying lights which may be confused with required navigation lights applies（）.