Operation Manual
Chapter 4: The chart application 61
Datum
The Chart application and your paper charts must use the same
datum to correlate accurately. The default datum for the display is
WGS1984. If that is not suitable, you can change it to one from the
set provided under the Datum option on the Chart Setup menu.
If you have a Raymarine GPS attached, it will automatically update
when you adjust the datum. If you use a third-party GPS, you need
to update its datum separately.
CAUTION: Changing the chart datum does not cause any
waypoints or routes stored in the chartplotter to move on
the display, although their latitude and longitude changes to
reflect the new datum. When you add waypoints to the
waypoint list, make sure they are referenced to the same
datum.
Chart offset and cartography setup
This feature allows you to move the position of the chart to correct
positional errors in the cartography. The adjustment is indicated as a
distance north/west (+ve) or south/east (-ve) from your vessel to a
maximum of 1000m. An indicator in the chart window tells you when
chart offset is enabled.
Restore chart offset to zero when you begin using a chart with the
correct georeference.
Please report chart errors to Navionics (see page 148).
To change chart offset
1. Select Chart Offset in the Chart Setup Menu.
2. Toggle OFFSET to ON.
3. Press the SET OFFSET softkey.
4. Adjust the North/South and East/West offset values by pressing
the corresponding softkey and using the trackpad.
To restore chart offset to zero
1. Select Chart Offset in the Chart Setup Menu.
2. Press the SET OFFSET softkey.
3. Press CLEAR OFFSET.
To open the Cartography Setup Menu
1. Press and hold the PAGE/MENU button.
2. Highlight Cartography Setup.
3. Press the right-arrow on the trackpad.
FUNCTION OPTIONS
Chart Display
The level of detail shown on the chart.
Simple
Detailed
Extra detailed
Chart Grid
Grid lines of latitude and longitude.
ON
OFF
Chart Text
Text appearing on the chart e.g. place names
etc.
ON
OFF
Chart Boundaries
The line indicating the extent of the chart.
ON
OFF
Spot Soundings
Number on the chart indicating depth.
ON
OFF