Furuno NavNet TZtouch3 Series User Manual

7. FISH FINDER (SOUNDER)
7-7
7.4 How to Select the Range
The range can be selected automatically or manually. To set the range selection meth-
od, tap the screen to show the pop-up menu, then set Auto Range to [ON] (automatic)
or [OFF] (manual) as appropriate.
Automatic range selection: The range is automatically changed to display the bot-
tom echo. The slider bar for range adjustment is turned off on modes other than bot-
tom lock* and bottom zoom*.
* The range for the bottom lock and bottom zoom displays can be adjusted with the
slider bar.
Manual range selection: Pinch the screen to change the range. Additionally, you can
adjust the range with the slider bar at the right side of the screen. Drag the slider knob,
or tap the [+] or [-] symbol at the top, bottom of the bar. The slider bar can be disabled
with [Show Range Slider] in the [Fish Finder] menu.
How to shift the display range
You can shift the display range up or down to see deep or shallow place. This function
is disabled during auto range operation.To shift the display range, drag the screen up
or down.
7.5 How to Adjust the Gain
Gain can be adjusted automatically (two methods, fishing, cruising) or manually.
7.5.1 Automatic gain adjustment
The automatic gain adjustment feature is convenient when you don’t have the time to
adjust the gain because you are busy with other tasks. With the automatic gain mode
activated, gain, clutter, and TVG are automatically adjusted. The main functions of the
automatic mode are as shown below.
• The gain is automatically adjusted to show the bottom echo in reddish-brown color.
• The clutter function removes weak echoes such as noise and plankton.
• TVG is automatically adjusted.
• The gain between low- and high-frequencies is automatically adjusted.
There are two types of automatic gain adjustment, fishing and cruising.
[Auto Fishing]: The gain is automatically adjusted to emphasize weak echoes from
schools of fish. Use this mode for fishing.
[Auto Cruising]: The gain is automatically adjusted to suppress weak echoes and
emphasize the bottom echo. Use this mode for cruising.
To select an automatic gain adjustment mode, tap the screen, tap [Adjust], then turn
on [Auto Fishing] or [Auto Cruising] as appropriate.

Furuno NavNet TZtouch3 Series Specifications

General

Brand	Furuno
Model	NavNet TZtouch3 Series
Category	Monitor
Language	English