单项选择题
A.Admiralty Sailing Directions B.Admiralty List of Signals C.Mariner's Handbook D.Admiralty Notices to Mariners
A chart has extensive corrections to be made to it. Whe...
单项选择题A chart has extensive corrections to be made to it. When these are made and the chart is again printed，the chart issue is a （）.
A.first edition B.new edition C.revised edition D.reprint
Charts are subject to frequent correction according to ...
单项选择题Charts are subject to frequent correction according to （）.
A.Notices to Mariners B.Mariner's handbook C.Sailing Directions D.Guide to Port Entry
Contour elevations on this chart refer to heights in fe...
单项选择题Contour elevations on this chart refer to heights in feet above mean （）.
A.lower low water B.high water C.low water D.sea level
