航海英語(yǔ)海圖及海圖作業(yè)單項(xiàng)選擇題每日一練(2019.01.14)

單項(xiàng)選擇題
The chart symbol indicating that the bottom is coral is （）.
A.C
B.Cl
C.Co
D.c
單項(xiàng)選擇題
The short-long dashed magenta line around Gardiners Island marks（）.
A.A regulated anchorage
B.Fish trap areas
C.An area closed to the public
D.Underwater cables
單項(xiàng)選擇題
The agonic line on an isomagnetic chart indicates the （）.
A.magnetic equator
B.magnetic longitude reference line
C.points where there is no variation
D.points where there is no annual change in variation
單項(xiàng)選擇題
Solid green arrows on the main body of a pilot chart indicate （）.
A.prevailing wind directions
B.prevailing ocean current directions
C.probable surface current flow
D.shortest great circle routes
單項(xiàng)選擇題
The shoreline on charts generally represents the mean（）.
A.High water line
B.Low water line
C.Low water spring line
D.Tide level

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