Furuno FMD-3200 Operator's Manual page 143

7. C-MAP CHARTS
Chart Legend
Type
Name: Name of chart.
Type: Type of chart.
Edition: Edition number of the chart.
Edition Date: Date the edition was published.
Update Number: Update number
Update Date: Date of update
Compilation Scale: The scale of the original paper chart is shown here.
Projection: Projection of current chart.
Horizontal Datum: Horizontal datum used with current chart.
Sounding Datum: Datum used to create sounding data.
Vertical Datum: Vertical datum used with current chart.
Units of Depth: Unit of depth used with current chart.
Units of Height: Unit of measurement used to measure height of objects above sea
level.
Magnetic Variation: Amount of magnetic variation. A positive value indicates a
change in an easterly direction and a negative value indicates a change in a westerly
direction.
Quality Indication: Quantitative estimate of the accuracy of chart features, given by
the chart producer.
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