A.To consider
B.To check
C.To examine
D.To agree with
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A.cylindrical projection
B.simple conic projection
C.polyconic projection
D.rectangular projection
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
A.Mercator projection
B.polyconic projection
C.orthographic projection
D.gnomonic projection
A.Summary of Corrections
B.Local Notice to Mariners
C.Daily Memorandum
D.Chart Correction Card
A.vertical distance from the chart sounding datum to the ocean bottom，plus the height of tide
B.vertical distance from the chart sounding datum to the ocean bottom
C.average height of water over a specified period of time
D.average height of all low waters at a place
最新試題
Which aid is NOT marked on a chart with a magenta circle? （）
On a Mercator chart，1 nautical mile is equal to（）.
The numeral in the center of a wind rose circle on a pilot chart indicates the （）.
That the scale of any part of a chart to be larger than the scale of the survey is（）.
The survey information upon which a chart is based is found （）.
What defines a great circle? （）
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（）.
When a buoy is in position only during a certain period of the year，where may the dates when the buoy is in position be found?（）
The soundings on the chart are based on the depth of water available at （）.
The shoreline on charts generally represents the mean（）.