24
ECDIS OPERATION
The remote brightness pot must be disconnected for ECDIS operation.
This Display has been calibrated for ECDIS operation at the factory and is provided along
with an ECDIS Color Calibration CD containing the ECDIS information and color tables.
Setting Controls for route monitoring
It is important that the display be adapted to lighting conditions on the bridge by selecting
the correct color table (Day, Dusk or Night).
The controls should only be used for fine adjustment within the appropriate color table.
In-addition to the external backlight brightness controls readily available to the mariner, the
LCD Display has internal controls, under the On Screen Display (OSD), available for
service engineers. These controls are the contrast and video brightness adjustments.
NOTE: Use of the Video Brightness and Contrast controls may inhibit
visibility of ECDIS information, particularly when using the
night color tables
To ensure that the controls are always set to a level above that at which information will be
lost, the black-adjust symbol BLKADJ (ref. IHO document S-52) shall be used as follows:
1 First set the backlight brightness to the calibrated position. Look at the black-
adjust symbol. Then either:
2A If the center square is not visible, turn up the backlight brightness until it just
appears.
2B If the center square is clearly visible, turn down the brilliance until the inner
square disappears, then turn the backlight brightness back up until the inner
square is just visible again.
(If the above adjustment is not successful, select a more appropriate color table and repeat
this procedure.)
The “black level” is now correctly set. If a brighter display is required use the backlight
brightness control, but it is better not to re-adjust the controls unless lighting conditions on
the bridge change.
Note that the black-adjust symbol should be displayed to check that the inner square
remains visible on the following occasions:
-
Every time that the video brightness or contrast controls are adjusted.
-
Every time that the display is switched to the night color table.
Color Differentiation Test Diagram Test
A multi-purpose color differentiation test diagram is illustrated in the IHO ECDIS
Presentation Library, Part I, section 15.4. It consists of 20 squares each colored
with one
of four main background colors and each having a diagonal line in one of six foreground
colors. Each diagonal line is two pixels wide.
