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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1.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

2.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

3.單項選擇題The broken magenta lines（long and short dashes）in and around Mobjack Bay indicate（）.

A.Amphibious training areas
B.Grounds for dredge spoil
C.Fish trap areas
D.Gunnery exercise areas

4.單項選擇題The arrangement of charts in the catalogue is（）.

A.on a regional basis
B.on a national basis
C.shown orderly
D.appeared from A to W

5.單項選擇題That the scale of any part of a chart to be larger than the scale of the survey is（）.

A.very rare
B.common
C.often
D.reasonable