Fish I.d - Lowrance X-4 Pro Installation And Operation Instructions Manual

Fish I.D.™
The Fish I.D.™ feature displays — as fish — targets that meet certain
conditions. The microcomputer analyzes all echoes and eliminates sur-
face clutter, thermoclines and other undesirable signals.
The Fish I.D. feature displays symbols on the screen in place of the ac-
tual fish echoes. There are three symbol sizes: small, medium and
large. These show the relative size between targets. In other words, it
displays a small fish symbol when it thinks a target is a small fish, a
medium fish symbol on a larger target and so forth.
Fish I.D. is an easier way for a sonar novice to recognize a fish signal
return when he sees it. But, locating fish by symbol only does have
some limitations.
Your sonar unit's microcomputer is sophisticated, but it can be fooled. It
can not distinguish between fish and other suspended objects such as
trotlines, turtles, submerged floats, air bubbles, etc. Individual tree limbs
extending outward from a group of limbs are the hardest objects for the
Fish I.D. feature to distinguish from fish.
Fish
arches
Underwater scene in normal fish arch mode (left). Fish I.D. menu with
To see what is under your boat in maximum detail, we recommend you
turn off Fish I.D. and begin learning to interpret fish arches.
You may see Fish I.D. symbols on the screen when actually, there are no fish.
The reverse is also true — Fish I.D. can actually miss fish that are present.
Does that mean Fish I.D. is broken? No — the feature is interpreting so-
nar 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 informa-
tion. This and other features can help you "see" beneath the boat under
varied water and fishing conditions. So, practice with the unit in both the
the feature turned on (right).
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Fish I.D.

symbols