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1. OPERATION
21
1.21 Menu Description
This section describes menu items not previ-
ously mentioned. For the [System] menu, see
chapter 2.
Sounder menu
[Zoom Mode]: Select the zoom display (bot-
tom lock, bottom zoom and marker zoom) to
show when "ZOOM" is selected with the
MODE knob. For details, see page 3 and 4.
[White Line]: Display the leading edge of the
bottom echo in white to help you distinguish
bottom fish from the bottom echo.
1) Select [White Line] and press the ENTER
key.
2) Set the width. The larger the number the
greater the width of the line. Select [Edge]
to show the contour of the bottom in white.
3) Press the ENTER key.
[White Marker]: Display the selected echo
color in white.
1. Select [White Marker] in the [Sounder]
menu and press the ENTER key.
2. Use S or T to select color desired. For
example, move the arrow to the top of the
color bar to display the bottom echo in
white. The echo color chosen on the color
bar is changed to white. That color is also
white on the color bar.
To turn off the white marker, select [Off].
3. Press the ENTER key.
4. To restore the original color, move the ar-
row to [Off] and press the ENTER key.
[TVG]: Two schools of fish of the same size
are displayed in different colors between deep
water and in shallow water because of the
feature of the ultrasound waves. TVG com-
pensates for propagation attenuation of the
ultrasound waves. It does this by equalizing
echo presentation so that the schools of fish
of the same size appear in the same color
(echo strength) in both shallow and deep wa-
ters. The gain is adjusted automatically de-
pending on the depth. The gain is low at short
distance and increases over distance. [High]
provides the greatest degree of gain reduction
against short range echoes.
Note: Auto gain must be disabled to use the
TVG.
[Smoothing]: Smooth echo presentation
when enabled. Turn smoothing on when ech-
oes appear "spotty" or “jagged”.
Color
bar
Select echo color
to display in white.