Northrop Grumman Sperry Marine VisionMaster FT, User Manual

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Charts Radar/Chart Radar User Guide
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Setting Name Setting Description Default
Value
Chart Scale
Boundary Displays a boundary around the largest scale
chart data in view On
Data Quality Pattern Pattern indicating the quality of chart data Off
Ignore Time
Attributes
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Display chart objects regardless of their S-57
date and time dependency attributes
(PERSTA, PERENC, DATSTA, DATEND) Off
Information Tags Displays information tags on chart objects that
provide descriptive text when queried. Off
Official Boundary Boundary between official and unofficial data. On
Overscale Pattern Overscale pattern displayed on charts that are
shown at a more detailed scale level than their
compilation scale. On
Scamin Filtering
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Suppresses chart symbols based on their
SCAMIN attribute. On
Shallow Pattern Shallow pattern displayed on waters shallower
than the safety contour. Off
Simplified Symbols Simplified symbols from the presentation
library used. Off
Two Shade Depths Controls whether two or four water depths
shades are used. Off
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Date-dependent objects, such as seasonal buoys, are only displayed over a certain period
(defined as IHO S-57 parameters PERSTA to PEREND). Other objects, such as a traffic
separation scheme, may have a date on which they are introduced (DATSTA) and/or
discontinued (DATEND). The system defaults to not displaying any ENC object with one of
these attributes outside its effective date/time.
To display all ENC objects outside their date/time dependency, tick
the Ignore Time
Attributes check box. When this setting is switched on, the ENC chart objects are displayed
and a permanent prompt `Chart Ignores Date and Time’ appears informing the user that ENC
information displayed may be incorrect for the present real date and time.
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SCAMIN is an attribute (defined by the IHO S-57 standard) that can be used to tag ENC
chart features to be suppressed above a certain display scale.
The primary function of SCAMIN is to declutter the chart display, enabling the operator to
focus on the most useful navigational information for the current display scale. As the chart
display is decluttered, SCAMIN also helps increase the chart re-draw performance.
The application of the SCAMIN attribute by the producer of the ENC data is optional; some
chart providers may not apply SCAMIN. Also, it may not be available consistently across
different ENC charts.