Furuno CH-250 - Manual (Page 49)

2-31
Color bar for the strata display
The depth of the bottom each in all directions is displayed in the sub window, in the colors set by
the color bar for the strata display. The color bar for the strata display shows search angle range
below 336 degrees.
Color bar for
strata display
0 ˚ 6 ˚ 12 ˚ 90 ˚ -6 ˚ -12 ˚ -18 ˚ -90 ˚
Strongest
color Weakest
color
The undulation of the bottom echo in all directions
is shown by the colors on the color bar for the
strata display.
18 ˚
The position of the weakest echo can be changed with the [RANGE] control, and the width of
each color on the color bar for the strata display with the [SECTOR] control.
Use the [SECTOR] control to
adjust width of each color.
Weakest color
Use the [RANGE] control to move
the location of the weakest echo color.
Note: TILT, TRAIN, FULL/HALF, FAST SCAN, R/B, EVENT, TARGET, CUSTOM MODE
controls may only be operated from the main window. When you attempt to operate
them from the sub window the message “SELECT MAIN WINDOW.” appears for about
four seconds.
Flat bottom and strata display
PORT STBD +90˚ -90˚
Each layer on the strata
display is equal to one
train on the horizontal
display.
The color of this position
on the color bar is the
color of point "a" on the
strata display.
When the bottom is flat
the horizontal display
inscribes the bottom as a
true circle, and the strata
display inscribes the color
of point "a".
Color "a"
on the color bar
Color "a"
Figure 2-30 Flat bottom and strata display