A.switching
B.alternating
C.oscillating
D.fluctuating
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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
A.plane tangent at one point
B.cylinder tangent at the equator
C.cone tangent at one parallel
D.infinite series of cones tangent at selected parallels
A.True position
B.True meridian
C.True course
D.True bearing
最新試題
Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
A preferred-channel buoy may be（）.
A mid-channel buoy，if lighted，will show a（）.
How would you pass a red buoy in the maritime buoyage system “A”? （）
A SEAMARK，I.E. A BUOY，INDICATING THE NORTH，EAST，SOUTH OR WEST FROM A FIXED POINT，E.G. A WRECK is（）.
Branford reef is（）.
A nun buoy will（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
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 structure，usually made of stone，or cement pilings，which extends from the bank at approximately right angles to the current is called a（）.