单项选择题
A.A rhumb line appears as a straight line B.Distance is measured at the midlatitude of the track line C.Meridians appear as curved lines converging toward the nearer pole D.Parallels，except the equator，appear as curved lines
Which information does the outer ring of a compass rose...
单项选择题Which information does the outer ring of a compass rose on a nautical chart provide（）.
A.variation B.true directions C.magnetic directions D.annual rate of variation change
Which chart symbol indicates the bottom is clay（）.A.Cly...
单项选择题Which chart symbol indicates the bottom is clay（）.
A.Cly B.Cla C.Cl D.C
Where would you obtain data on currents for areas of th...
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
