单项选择题
A Mercator chart is a （）.
A.cylindrical projection
B.simple conic projection
C.polyconic projection
D.rectangular projection
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相关考题
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单项选择题
A revised print of a chart is made （）.
A.after every major hydrographic survey of the area covered by the chart
B.when there are numerous corrections to be made or the corrections are extensive
C.when a low-stock situation occurs and minor corrections are made
D.every two years to update the magnetic variation information -
单项选择题
All straight lines represent great circle tracks on a chart based on a(n) （）.
A.Mercator projection
B.polyconic projection
C.orthographic projection
D.gnomonic projection -
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
