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單項選擇題

The short-long dashed，magenta lines parallel to York River Entrance Channel mark（）．

A.fish trap areas
B.naval exercise areas
C.underwater cables
D.recommended track lines

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單項選擇題

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