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Raster Chart material
ARCS Charts
Around 2700 ARCS charts are available on 11 Chart CD-ROMs, covering the world's major trading routes and ports.
Regionally based Chart CD-ROMs RC1 to RC10 contain standard BA navigation charts, while RC11 contains
ocean charts at scales of 1:3,500,000 and smaller. ARCS charts are facsimile copies of BA paper charts, and as such
share a common numbering system. New Editions and New Charts for ARCS and BA paper charts are issued
simultaneously. They are supplied on each weekly Update CD-ROM until incorporated into the Chart CD-ROMs at
the next issue.
Occasionally, it is necessary to issue new charts in advance of their intended date of validity, for example a change in
regulations commencing on a future date. In such cases the current chart will co-exist with the new chart until the
date of implementation, the earlier chart being indicated with a suffix "X" after the chart number. The system will
allow access to both charts for the period of overlap by issue of new chart permits.
Sometimes you may wish to add manually Notices to mariners or Navtex warnings into your ARCS charts. In this
system this kind of things are called as Manual Updates. Manual updates are valid for both ARCS and S57 charts so
that you need to define them only once. Also manual updates are valid for all scales so that you don't need to repeat
them for charts published in different scales from the same area. See more details in chapter Manual Updates.
Chart legend of ARCS chart
CHART LEGEND is not a push button, but it is the front-page that is displayed as a base. If you push CANCEL
enough you will finally get CHART LEGEND. The chart legend gives information to the user about edition date
and updates of the displayed chart
Chart number:
Number of current chart is shown in this field.
Country Of Origin:
The country which has produced original chart.
Latest NM:
Date when the latest Notice to Mariners included to chart.
Edition Date:
Date when the chart was issued.
Publication Date:
Issue date of Update CD used to update the system.
WGS shift status:
Datum shift between local Datum and WGS84 datum is known (=Defined), unknown or user defined (=Undefined)
or shift is known only some parts of chart (=Partially defined).
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