Raytheon Pathfinder ECDIS Operator's Manual page 29

A periodical update−service of the ARCS −seacharts is ensured by the
manufacturer.
A seachart in raster−data−format is divided into pixels and then stored.
On the screen of the ECDIS these pixels will be displayed.
In this way the complete (paper−) chart equivalent is displayed on the screen.
As additional information only the geographically coordinates are displayed
(after selection by courser) on the Information Panel.
Other, for seacharts typically information, as there are buoys, light beacons,
wrecks or depth information can only be read out of the displayed seachart.
The Zoom−function is reduced to 2 steps.
There is no object query possible on Raster charts.
1.1.4 Charting Capabilities for DNC Chart Types
The Digital Nautical Chart (DNC) is produced by the National Geospatial−Intelli-
gence Agency. This chart type is an unclassified, vector−based digital database
containing maritime significant features essential for safe marine navigation.
Edition: 30.MAR.2007
ECDIS
Operator Manual
1−5
R
Raytheon Anschütz GmbH
Germany
3655DOC020102