A.a hard sand shoal marked with a light
B.completely submerged at all stages of the tide
C.surrounded by rocks awash at low water spring tides
D.a small，low，sandy islet surrounded by shoal water
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A.directions
B.distances
C.locations
D.All of the above
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Rectangle
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Square
A.wreck
B.shoal area
C.anchorage area
D.middle ground
最新試題
A rock and sand structure extending from the bank of the river toward the channel is known as 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（）.
Fishing stake，the position of which frequently（），exist in the area covered by this chart.
A yellow buoy may exhibit a(n)（）.
How would you pass a red buoy in the maritime buoyage system “A”? （）
A nun buoy will（）.
A yellow buoy may mark a(n)（）.
A relative bearing is always measured from（）.
Buoys which mark isolated dangers are painted with alternating（）.
Branford reef is（）.