How To Activate Or Deactivate An Alarm; Alarm Sensitivity; Accu-Fish - Furuno TZTL12F Operator's Manual

7. FISH FINDER (SOUNDER)
7.11.2

How to activate or deactivate an alarm

Fish alarm
1. Open the home screen, then tap [Settings] - [Sounder].
2. Turn [Fish Alarm] on or off.
The fish alarm can also be activated or deactivated with [Fish Alarm] on the pop-up
menu.
Bottom lock fish alarm
Open the home screen, then tap [Settings] - [Sounder]. Turn [Fish Alarm for Bottom
Lock] on or off.
7.11.3

Alarm sensitivity

You can select the echo strength that releases the fish alarms.
1. Open the home screen, then tap [Settings] - [Sounder].
2. Tap [Fish Alarm Level].
3. Tap which echo strength releases the fish and bottom lock alarms.
[Low]: Light-blue or stronger echoes
[Medium]: Yellow or stronger echoes
[High]: Red and reddish-brown echoes
4. Tap the close button to finish.
7.12

ACCU-FISH

The ACCU-FISH
Bottom Discrimination Sounder BBDS1 or Network Fish Finder DFF1-UHD, calculates
the length of each fish and shows a fish symbol and depth value or fish length.
Usage guidelines
• The information given by this feature is intended for reference only.
• This feature cannot be used with the inside-hull transducer since a fish may not be
detected depending on the frequency of the transducer. Even if a fish is detected,
the fish length indicated may be smaller than the actual length.
• ACCU-FISH
gardless of the frequency mode in use.
• The intensity of an echo depends on fish species. If the indicated length is different
from the true length, you can apply an offset in the [Sounder] - [ACCU-FISH Size
Correction] menu of the menu.
7-12
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feature, which requires an ACCU-FISH
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uses both low and high frequency echoes for the measurements re-
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capable transducer or