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Does that mean Fish I.D. is broken? No — the feature is simply inter-
preting sonar returns in a specific way to help take some of the work
out of reading the screen. Remember: Fish I.D. is one of the many tools
we provide so you can analyze your sonar returns for maximum fish
finding information. This and other features can help you successfully
"see" beneath the boat under varied water and fishing conditions. So,
practice with the unit in both the Fish I.D. mode and without to become
more familiar with the feature. The default for Fish I.D. is off.
Sonar Features menu with Fish I.D. Symbols selected.
When the check box to the left is checked, the feature is on.
To turn the Fish I.D. feature on:
1. From the Sonar Page, press
MENU|↓ to SONAR FEATURES|ENT.
2. Press ↓ to
FISH ID SYMBOLS|ENT|EXIT|EXIT.
To turn off Fish I.D., repeat these instructions.
FishReveal
When displaying actual sonar returns, the FishReveal feature uses 16
levels of gray tones to show fish targets hidden by surface clutter,
thermoclines, weed beds and other cover.
The normal mode of operation (with FishReveal turned off) shows the
weakest echoes as black and the strongest echoes in light gray. Since
all weak echoes are black, fish arches show boldly against the white
background. The drawback is that all weak echoes – such as thermo-
clines – are also emphasized. This can make it hard to distinguish fish
signals inside thermoclines or other cover.
In FishReveal mode, the weakest echoes are white and the strongest
echoes are black. Echoes in between vary in gray in proportion to their
signal strength. The Grayline control determines the range for black to