A-Scope Display (Display Only) - Furuno TZTL12F Operator's Manual

7. FISH FINDER (SOUNDER)
Bottom zoom display
The bottom zoom display expands the bottom and the fish near the bottom according
to the zoom range selected on [Zoom Range Span] in the [Settings] - [Sounder] menu.
This display helps you find the density of the bottom. A short echo tail normally indi-
cates a soft bottom (sand bottom, etc.). A long echo tail indicates a hard bottom.
Bottom
7.2.4

A-scope display (display only)

The A-scope display appears at the right of the screen and is available in any fish find-
er mode. This display shows the echoes at each transmission with the amplitudes and
tone in balance with their intensities. This display helps you identify possible fish spe-
cies and bottom structure.
How to show or hide the A-scope display
Tap the screen to show the pop-up menu, then turn [A-Scope] on or off.
A-scope peak hold
You can show the "normal" A-scope display plus the peak-hold amplitude picture for
the last five seconds in dots.
1. Open the home screen, then tap [Settings] - [Sounder].
2. Turn on [A-Scope Peak Hold].
3. Tap the close button to finish.
7-4
Bottom zoom display
ft
40.4
BZ/LF
Single frequency display
Single freq. display
Zoom marker
Weak reflection
(small fish or noise)
Fish Fish
echo echo
Strong
reflection
(bottom)
A-scope display
Zoom marker
automatically
follows change in
depth.
"Peak" shows past
amplitude with dots.