56
Sonar Operations
As you can see from the quick reference on the previous page, basic operation
is pretty easy, right out of the box. If you are a sonar novice, try operating the
unit with the factory defaults until you get a feel for how it's working.
As you're learning the basics, there is one setting you might want to tinker
with from time to time — Sensitivity.
Sensitivity controls the unit's ability to pick up echoes. If you want to see
more detail, try increasing the sensitivity, a little at a time. There are
situations when too much clutter appears on the screen. Decreasing the
sensitivity can reduce the clutter and show the strongest fish echoes, if fish
are present. As you change the sensitivity setting, you can see the difference
on the chart as it scrolls.
These figures show results of different sensitivity levels on the same
location. Fig. 1: Sensitivity at 88 percent. Typical of full auto mode. Fig.
2: Sensitivity set at 75 percent. Fig. 3: Sensitivity set at 50 percent. Fig.
4: Sensitivity set at 100 percent.
You can change the sensitivity level whether you are in Auto
Sensitivity mode or Manual Sensitivity mode. The adjustment method
works the same in both modes, but gives you slightly different results.
Fig. 1
Fig. 2
Fig. 3
Fig. 4
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