Furuno FEA-2107 - Controlling Visible ARCS Chart Features

9. Raster Chart Material
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9.5.5 Controlling visible ARCS chart features
The Display dialog box contains several pages to control visible chart features.
Chart page
Black and grey color symbol:
This symbol is used to verify that you can distinguish black (frame of symbol) and
grey (inner part of symbol) colors with current contrast and brilliance settings.
Dsp Dimmer:
Use this control to adjust dimming of the display. The text “CALIB” indicates that
dimming of display is set within calibration values. Monitor brilliance is restored to
calibrated state by doing the following:
1) Place the cursor on the calibration bar and spin the thumbwheel to show
“CALIB”.
2) Select “Set Std Display” from the menu.
3) Press and hold down any one of the F1-F4 keys more than two seconds on
the Control Unit RCU-015.
Shallow contour:
Set value of shallow water contour.
Safety depth:
Set value of safety depth. Spot soundings below the safety depth are highlighted.
Safety contour:
Set value of safety contour. Visible safety contour is equal to set value or if the
contour of set value is not available then the visible safety contour is next deeper
contour than safety contour.
Note: The system uses safety contour also for chart alarms.
Deep contour:
Set deep-water contour.
TM reset:
In the true motion mode, own ship moves until it reaches the true motion reset
borderline, and then it jumps back to an opposite position on screen based on its
course. Set the limit for TM reset (in percentage).
Note: ARCS charts are “photocopies” of original paper charts. One cannot change images of
these photocopies. Selections of shallow contour, safety depth, safety contour, deep contour,
symbols, depths, boundaries, light sectors, shallow pattern and Update highlight in Chart page
control only visibility of add-on layer(s) on top of the ARCS chart image (manual updates are
such an add-on layer). For more information about manual updates, see the chapter on manual
updates.
Palette:
Choose appropriate palette for the display depending on the brightness of the bridge.
Symbols: