Raytheon Pathfinder ECDIS Operator's Manual page 66

2.9 CHART AREA
The chart area is where the ECDIS displays ship, electronic charts symbol, and
past tracks. It is also where you will enter waypoints/routes, set markers, and
draw lines.
The display has optional latitude/longitude grid lines which cover the entire world
and are measured in degrees and minutes, with minutes expressed to the
hundredth decimal.
The degrees and minutes currently in view appear down the left side and across
the bottom of the display. You can control the appearance and location of the
display using commands in the Display menu.
The ECDIS supports charts from government agencies (S57, DNC and ARCS)
and private chart manufacturers, like C−MAP. Please consult your dealer for the
availability of charts in your area.
2.9.1 Chart Boundaries
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 other information
by clicking the right mouse button. When a portion of the area you are viewing is
not covered by the chart currently displayed, the area appears green in color. If
you are viewing an area of the globe for which you have no charts, the area
appears white.
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Operator Manual
All charts are displayed in a "North−up" orientation.
Datum is always WGS 1984 (World Geodetic System).
NOTE
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Edition: 30.MAR.2007