单项选择题
Where would you obtain data on currents for areas of the world not covered by the National Ocean Service（）.
A.In the Coast Pilot B.In the Nautical Almanac C.In the List of Lights D.In the Sailing Directions
单项选择题 The soundings on the imperial chart are measured in（）.
单项选择题 The short-long dashed，magenta lines parallel to York River Entrance Channel mark（）．
单项选择题 The short-long dashed magenta line around Gardiners Island marks（）.
