Automatic Fish Finder Operation; How The Automatic Fish Finder Operates; How To Select An Automatic Fish Finder Mode - Furuno MFD12 Operator's Manual

7.3

Automatic Fish Finder Operation

Your fish finder can be adjusted automatically to let you do other tasks.
7.3.1

How the Automatic Fish Finder Operates

The automatic fish finder function automatically adjusts the gain, clutter, TVG and
echo offset and range (ETR series only). 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.
7.3.2

How to Select an Automatic Fish Finder Mode

There are two types of automatic fish finder modes: Cruising and Fishing. Cruising
tracks the bottom, and Fishing searches for schools of fish. Cruising uses a higher
clutter removal setting than Fishing. Do not use Cruising when your purpose is to find
fish, because the clutter removal circuit can erase weak echoes.
To select an automatic fish finder mode:
1. Push the RotoKey.
2. Use the RotoKey to select [Auto] followed by [Fishing] or [Cruising].
The items controlled automatically depend on the network sounder connected, as
shown in the table.
Network sounder
ETR series
DFF series
FCV-1150
Automatic control
Gain, clutter, TVG, echo offset, and range
Gain, clutter, TVG, and echo offset
Gain, clutter, TVG, and echo offset
7. Fish Finder
7-7