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 white buoy with a blue band is（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
A relative bearing is always measured from（）.
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A preferred-channel buoy will show a（）.
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.
Except for N-S courses，and E-W courses on the equator，a great circle track between two points，when compared to a rhumb line track between the same two points，will（）.
A white buoy with an orange rectangle on it displays（）.
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.