Arcs Chart Display; Displaying Arcs Chart Material; Choosing Arcs Chart Datum - Furuno FEA-2107-BB Operator's Manual

9. Raster Chart Material
9.5

ARCS Chart Display

9.5.1

Displaying ARCS chart material

To display ARCS format raster chart material on the display, do the following:
1. Place the cursor just above the area where the ECDIS shows chart scale.
2. Spin the scrollwheel to show "Activate ARCS Chart" in the mouse functions area, then push the left mouse
button to show ARCS charts on the display.
9.5.2

Choosing ARCS chart datum

Datum is used to choose between different models of the earth. It is essential that you use datum in a consistent way.
If you use paper charts together with electronic charts, it is recommended that you use the same datum as your
current paper chart to avoid misalignment between your electronic system and points taken or plotted on your
current paper chart.
Once you have chosen a datum, all numerical latitude and longitude position values are presented in your chosen
datum.
Note: If you use ARCS raster chart material, the rasterized charts contain some rasterized position information.
These positions, like scales in the edges of ARCS charts, are true only if you have chosen native datum of that
ARCS chart. Normally this is the natural situation, because you use ARCS together with corresponding official
paper chart and because you have chosen the datum that is equal to the official paper chart.
To find out native datum of ARCS chart, do the following:
1. Click the sidebar area in the information area, spin the scrollwheel to show Menu/ /Select Sidebar in the mouse
functions area, push the right mouse button, choose Chart Legend from the menu then push the scrollwheel.
2. Click the Details... button in the Chart Legend window to show ARCS Details.
In the Hor Datum field the native datum of the displayed ARCS chart is shown.
3. Move the cursor over Datum on the upper right corner of the ECDIS and choose desired datum by spinning the
scrollwheel and pushing it to confirm selection. Chosen datum is shown on the status bar (at the top of the
screen).
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