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178 · Raster Chart material
uses underscale or overscale image of an ARCS chart, the scale indication is in red colour like 1:20000. The system
has also indication UNDERSCALE or OVERSCALE.
The system has indication of Equal RNC, if you have a chart with the same scale and overlapping with displayed
ARCS chart. When you are reaching to edge of chart and you have indication Equal RNC, you can switch an other
chart with the same scale to the display by pressing SELECT NEXT push button from the Control Panel. An
overlapping chart with same scale will be opened.
Look charts around your own ship
You can use either TRUE MOTION or RELATIVE MOTION. Refer to DISPLAY MODE chapter. In True
motion your own ship moves until it reaches the true motion reset borderline. Then it will jump back to opposite
position on screen based on its course. In relative motion your own ship stays in a fixed position while the chart
under it moves on screen.
If you use true motion and you press TM/CU RESET, your ship will immediately jump to true motion reset
position.
If you use true motion and you press SHIP OFF CENTER, your ship will go to that position on screen and continue
true motion movement from that position. When it reaches true motion reset borderline it will automatically jump to
true motion reset position.
If you use relative motion and you press TM/CU RESET, your ship will immediately jump to true motion reset
position and use that position as fixed position to stay on screen.
If you use relative motion, you can select a new fixed position to your ship by pressing SHIP OFF CENTER push
button.
Use ZOOM IN and ZOOM OUT push buttons to select desired scale of the chart.
This is possible view of ECDIS screen, note also upper status bar indications and no TM RESET OFF and ECDIS
indicates that Equal ENC available at own ship position.