Sperry Marine VISIONMASTER FT ECDIS-E - Chart One Presentation Library; Chart Safety Information; Display Overscale Pattern; Larger Scale Available Prompt

Charts ECDIS-E User Guide
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Display Overscale Pattern
The overscale pattern is displayed over charts if
the scale ratio of the display is more than double
the compilation scale of any charts in the display.
For example, if the compilation scale of the
displayed chart is 1:75,000 and the scale ratio is
set to 1:30,000 or less.
The overscale pattern is a series of closely aligned
dotted vertical lines across the whole of the chart
display.
Larger Scale Available Prompt
The Larger Scale Chart Available at Ship prompt is shown when the
largest scale chart under the ships position, considering ALL enabled chart
databases, is not displayed.
Chart Safety Information
Chart data suppliers such as UKHO may provide additional safety-related
information about supplied ENC chart sets. This information comes in the
form of a ReadMe.txt file which is accessed from the SevenCs
ChartHandler screen.
For instructions on accessing this safety information, refer to Appendix A
`Chart Installation’.
Chart One Presentation Library
The Chart One Presentation Library contains an index of chart symbols, as
used on vector charts, see Chart 1.