A.fixed red light
B.Morse (A) white light
C.composite group-flashing light
D.yellow light
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A.flashing
B.pulsating
C.occulting
D.alternating
A.switching
B.alternating
C.oscillating
D.fluctuating
A.sharp turn in the channel
B.narrowing in the channel at that point
C.junction in the channel
D.obstruction that must be left to port
A.should be passed close aboard on either side
B.indicates that special caution is required
C.is used at a channel bifurcation or junction
D.is painted with red and white vertical stripes
A.easterly courses in high latitudes
B.southerly courses in high latitudes
C.westerly courses in low latitudes
D.easterly courses in low latitudes that cross the equator
最新試題
A nun buoy will（）.
A yellow buoy may exhibit a(n)（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
Buoys which mark isolated dangers are painted with alternating（）.
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
A white buoy with an orange rectangle on it displays（）.
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
Branford reef is（）.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
Buoys which mark dredging areas are painted（）.