Automatic Fish Finder Operation; How The Automatic Fish Finder Operates; How To Select An Automatic Fish Finder Mode; Manual Fish Finder Operation - Furuno NAVnet TZtouch2 Operator's Manual

7.4

Automatic Fish Finder Operation

Your fish finder can be adjusted automatically to let you do other tasks.
7.4.1

How the automatic fish finder operates

The automatic fish finder function automatically adjusts the gain, clutter, TVG, echo
offset and range. The main features of the automatic mode are as shown below.
• Gain adjusts the sensitivity of the receiver to show the bottom echo in reddish-
brown (default color arrangement).
• Clutter automatically reduces low-level noise like plankton.
• The TVG function is automatically adjusted.
• The echo offset balances the gain on high and low frequencies.
• Range is adjusted automatically to show the bottom echo.
7.4.2

How to select an automatic fish finder mode

There are two types of automatic fish finder modes: [Auto Fishing] and [Auto Cruising].
[Auto Fishing] searches for schools of fish, and [Auto Cruising] tracks the bottom.
[Auto Cruising] uses a higher clutter removal setting than [Auto Fishing]. Do not use
[Auto Cruising] when your purpose is to find fish, because the clutter removal circuit
can erase weak echoes.
To select an automatic fish finder mode, tap the screen to open the pop-up menu,
tap [Adjust] then tap [Auto Fishing] or [Auto Cruising]
7.5

Manual Fish Finder Operation

Use the manual operation to see schools of fish and the bottom echo with a fixed gain
setting. The gain, range and range shift functions let you select the depth you can see
on the screen.
7.5.1

How to select the manual mode

Tap the screen to open the pop-up menu. Tap [Adjust] then tap [Manual].
7.5.2

How to select the display range

Manual range setting
Pinch the fish finder screen or use the slider bar. The slider bar can be shown or hid-
den with [Show Scale Slider] in the [Settings] - [Sounder] menu.
How to turn on or off the auto range
The range can be selected automatically or manually. tap the screen to open the pop-
up menu, then turn [Auto Range] on or off.
7. FISH FINDER (SOUNDER)
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