Lowrance electronic X-20A SONAR User Manual


 
FISH I.D.
The Fish 1.0. feature is
automatically
on when the unit is first turned on.
The
computer
inside the
unit
analyzes
all
echoes,
filtering
out unwanted
signals.
It
helps
eliminate surface
clutter, thermoclines,
and other un-
desirable
signals.
The
remaining suspended targets
are
usually
fish.
Targets
that are identified
by
the unit as fish are
displayed
as
small,
medium,
or
large
fish
symbols
on
the
display.
These
symbols
are
shown
according
to the relative size of the fish as seen
by
the unit. The
Fish l.D. feature can
only
be used in automatic. If
you
wish to turn it
off,
or back on
again, press
the FISH I.D.
key.
If
you press
the
FISH 1.0.
key
when the unit is in
manual,
it will
put
it in automatic and enable the Fish
1.0. feature.
To show fish
symbols, you
must be
traveling
at a slow
trolling speed.
There should be some movement of the
_____________________
boat for the Fish 1.0. feature to work
________ _____
properly.
AUTO
If
you
have
difficulty showing
fish
sym-
bols, try increasing
the
sensitivity.
FISH l.D. FEATURE ON
NOTE: The Fish 1.0. feature cannot
distinguish
between fish and other
suspended objects
such as
turtles,
tree
branches, trotlines,
submerged
floats,
or other inanimate
objects.
The
micro-computer
in this unit is so-
phisticated,
but it can be fooled. The most difficult
challenge
is individ-
ual tree branches
extending
out from
groups
of branches. These can
be mis-identified as fish
by
the Fish 1.0. feature.
Also,
large
amounts of
noise can fool the Fish ID. feature. This is
usually
caused
by
a
poor
transducer installation.
Although
the Fish 1.0. feature isn't
perfect,
it can be a valuable aid to the
fisherman.
MODE 3-
Big digital.
a)
The
digital depth
numbers
use the lower
quarter
of the
display.
The
depth
is dis-
played
in tenths of a foot to
99.9
feet,
then it is
displayed
in whole
numbers.
b)
No
FASTRAK,
MODE 4
-
Depth
only
displayed
in
large digits.
No chart
display.
10
15
£1
AUTO
RANGE
Is
-
RANGE
20
PIE
EQ
83'I
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