Lowrance LCX-20C, Operation Instructions Manual

Page: 75 / 200

67
conditions directly under the boat. This makes it useful for ice fishing,
or when you're fishing at anchor. When the boat is not moving, fish
signals are long, drawn out lines on a normal chart display. FasTrack
converts the graph to a vertical bar graph that, with practice, makes a
useful addition to fishing at a stationary location.
Sonar Page showing FasTrack.
Fish I.D.

(Fish Symbols & Depths)
The Fish I.D. feature identifies targets that meet certain conditions as
fish. The microcomputer analyzes all echoes and eliminates surface
clutter, thermoclines, and other undesirable signals. In most instances,
remaining targets are fish. The Fish I.D. feature displays fish symbols
on the screen in place of the actual fish echoes.
There are several fish symbol sizes. These are used to designate the
relative size between targets. In other words, Fish I.D. displays a small
fish symbol when it recognizes a target as a small fish, a medium fish
symbol on a larger target and so on.
The sonar's microcomputer is sophisticated, but it can be fooled. It can't
distinguish between fish and other suspended objects such as trotlines,
turtles, submerged floats, air bubbles, etc. Individual tree limbs
extending outwards from a group of limbs is the hardest object for the
Fish I.D. feature to distinguish from fish.
You may see fish symbols on the screen when actually, there are no
fish. The reverse also is true.
Does that mean Fish I.D. is broken? No. The feature is simply
interpreting 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. Practice with Fish I.D. mode on and off to become more
familiar with it. The default for Fish I.D. is off.
Structure
Colorline

Bottom signal
Fish arches
FasTrack,
fish arches
show as
horizontal
bars.
FasTrack
bar graph