A.the starboard side of the channel
B.the centerline of the channel
C.an obstruction where the preferred channel is to starboard
D.special purpose areas
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A.a black ball
B.a diamond shape
C.two cones，apexes together
D.one cone，apex upward
A.green squares
B.green triangles
C.red squares
D.red triangles
A.a floodlight
B.two red lights in a vertical line
C.a single red light
D.any visible lights
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
最新試題
A vessel towing is showing three forward white masthead lights in a vertical line. This means that the length of the（）.
A tug is towing three manned barges in line in fog. The first vessel of the tow should sound （）.
A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show （）.
Daymarks marking the starboard side of the channel when going towards the sea are（）.
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 power-driven vessel，when towing astern，shall show（）.
During the day，a vessel with a tow over 200 meters in length will 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（）.
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.