Operation Manual

Chapter 6: Fishfinder application 75
Transducer frequency
Your transducer may support a number of frequencies.
The same target will appear differently when the transducer fre-
quency is changed. The lower the frequency, the broader the mark.
For information on setting the transducer frequency see Transducer
settings on page 87.
Clutter / Background noise
The fishfinder picture may be impaired by echoes received from
floating or submerged debris, air bubbles or even the boats move-
ment. This is known as ‘background noise’ or ‘clutter’ and is
controlled by the gain modes. It is recommended that you allow your
system to automatically control the ideal sensitivity level based on
depth and water conditions. You can however adjust these settings
manually if you prefer.
For information on reducing clutter and background noise see Gain
and power on page 80.
6.4 Fishfinder Pre-set operation
The fishfinder provides you with four preset configurations, available
on the default toolbar. These are tailored to provide optimal opera-
tion in different circumstances.
Each preset has been configured to provide the best operating
parameters for the fishfinder. However, it is possible to adjust the
presets if necessary.
To select a preset mode
1. Press the appropriate softkey to select from:
•Single
•Dual
• Shallow
• Deep.
When you make a fishfinder window active, the title bar shows you
which preset is selected, along with its settings.
Preset display modes
When a fishfinder preset is selected, its softkey label changes to
ADJUST. Pressing this key allows you to configure the display
mode settings to suit your requirements. (Changes to the display
mode are saved with the preset at power-off.)