单项选择题
Chart correction information is NOT disseminated through the （）.
A.Summary of Corrections B.Local Notice to Mariners C.Daily Memorandum D.Chart Correction Card
单项选择题 Charted depth is the （）.
单项选择题 How is the annual rate of change for magnetic variation shown on a pilot chart?（）
单项选择题 In which source could you find the number of a chart for a certain geographic area?（）
