A.Mercator projection
B.polyconic projection
C.orthographic projection
D.gnomonic projection
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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
A.Gray lines on the uppermost inset chart
B.Red lines on the main body of the chart
C.In parenthesis on the lines of equal magnetic variation
D.Annual rate of change is not shown
A.Chart No.1
B.Catalog of Charts
C.IMO Practical Navigator
D.IMO Light List
A.points of equal variation
B.points of zero variation
C.the magnetic latitude
D.magnetic dip
最新試題
Which chart symbol indicates the bottom is clay（）.
The description Racon beside an illustration on a chart would mean a （）.
When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.
Particular care is needed when navigating in the vicinity of（）as very few of these features have been fully surveyed to modern standards to determine their correct position，full extent，or the least depth over them.
（）is not a position-fixing system.
Which aid is NOT marked on a chart with a magenta circle? （）
What defines a great circle? （）
What information is NOT found in the chart title? （）
A chart position enclosed by a square is a（n）（）.
A chart projection depicting the poles and a small area on either side of a connecting meridian，that is sometimes used for star charts，is the（）.