单项选择题
A.mean low water
B.mean lower low water
C.mean high water
D.mean high water springs
单项选择题 The revision date of a chart is printed on which area of the chart? （）
单项选择题 The path that a vessel is expected to follow，represented on a chart by a line drawn from the point of departure to the point of arrival，is the（）.
单项选择题 The only cylindrical chart projection widely used for navigation is the （）.