Raytheon Pathfinder ECDIS Operator's Manual page 26

1.1 Types Of Charts
ECDIS displays the type and scale of the displayed chart in the information
panel. As you change the scale of the display, or center the display on other
areas,
ECDIS is displaying a more appropriate chart. If the display is centered over a
region not covered by any of the installed charts, no chart is displayed. For ex-
ample, if you zoom in on an area, ECDIS displays the chart that features the
most detailed coverage of that region; if you zoom out, it displays the chart that
features broadest coverage. It also makes similar adjustments when you move
the display to the left or right, and up or down.
While a chart is displayed, you may see red lines drawn on the display.
These lines designate the different fragments of the paper charts.
You may view the source of the chart; the chart name, manufacturer, date and
much more by clicking the right mouse button.
1.1.1 Charting Capabilities for S57 (CM93/3) Chart Types
Legal Equivalence With Paper Charts
In order an ECDIS to be the legal equivalent of paper charts, the following condi-
tions must be true:
The system must display official ENC (Electronic Nautical Chart), issued by
a national Hydrographic Office.
The ENC must be up to date.
Regulation
The IHO S−63 data format is decoded by the ECDIS Program to pure ENC for-
mat.
ENC in S57 (93/3) format are produced and issued by national Hydrographic Of-
fices, then distributed to vessels either directly, or through a Regional ENC Coor-
dinating Center (RENC), that also performs quality checking and integration, or
through other distributors and service providers.
On the ship, S57 (93/3) data is loaded into the ECDIS in a dedicated storage
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Operator Manual
the type of the chart being displayed may change, indicating that
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Edition: 30.MAR.2007