Sperry Marine Visionmaster FT ECDIS, User Manual

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ECDIS User Guide Charts
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Enabling AUTO Scale Preferences
When automatic chart database selection is enabled for a display area, the
system periodically searches all enabled databases and automatically
changes the selected database to be the one which provides the largest
scale chart at own ship position. When multiple enabled chart databases
provide a largest scale chart with an identical scale, the chart database with
the highest priority is selected.
To enable Auto Scale Preferences to operate the display must be in Auto
scale mode, see Chapter 3, `Scale Ratio’.
To enable tick the Allow Automatic Database Selection check box.
Manual Database Selection
When a display is in manual database selection mode, the display area
uses the selected chart database specified in the Chart button, see Chart
Database & Sub Menu Selection
The chart display automatically switches from automatic database selection
mode to manual database selection mode as the result of the following:

The operator manually changes the selected chart database.

Automatic scaling mode becomes disabled.
Supported Chart Engines and Chart Databases
The VisionMaster system supports C-Map and SevenCs chart engines.
The C-Map chart engine supports the following chart databases:

C-MAP ENC
19

C-MAP Profe
20

C-MAP ENC+
21
The SevenCs chart engine supports the following chart databases:

S63 (encrypted S-57)
22

S-57
23

ARCS
24
(raster format charts)
19
Official S-57 charts converted to CMAP's proprietary chart database format.
20
Profe is an extended version of CM93v3 charts supplied on DVD.
21
The C-Map ENC+ database consists of official ENC data and unofficial C-Map chart data
where official data is not present.
22
Encrypted official chart format, implementation is based on IMO S63 standard.
23
Unencrypted official chart format, implementation based on IHO S57 standard.
24
Admiralty Raster Chart Service. Suppliers of raster format electronic charts with world
coverage, in the HCRF format.