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Very
small fish
probably
will
not arch at all. Medium sized fish will
show a
partial arch,
or
a
shape
similar to an arch if
they're
in
deep
water.
Large
fish will
arch,
but turn the
sensitivity up
in
deeper
water
to see the arch. Because of
water
conditions,
such as
heavy,
surface
clutter,
thermoclines, etc.,
the
sensitivity
sometimes cannot be in-
creased
enough
to
get
fish arches.
One of the best
ways
to
get
fish arches is to
expand
or
"zoom" a
segment
01 the water. For
example,
from 45 to 60 feet. The smaller
the
segment,
the better the screen resolution will be. The
easiest
way
to do this on the X-25 is with the Zoom
feature. This feature
expands
the
echoes,
making
it easier to see detail. For the best
results,
turn
the
sensitivity up
as
high
as
possible
without
getting
too much noise
on the screen. In medium to
deep water,
this method should work to
display
fish arches.
If
you
see fish
signals
when the unit is in the manual
mode,
but don't
get
fish
symbols
when the Fish ID. feature is
on,
try increasing
the
sensitivity.
WATER TEMPERATU RE AND THERMOCLINES
Water
temperature
has an
important-if
not
controlling-influence upon
the activities of all fish. Fish are cold
blooded and their bodies are
always
the
temperature
of the
surrounding
water.
During
the
winter,
colder water slows down their metabolism.
At this
tirrie, they
need
about a fourth as much food as
they
consume in the summer.
DISPLAY
-
General
The
lights
flash for about ten seconds when the X-25 is turned on.
Three menus
appear,
one after the other. The menus are the
lights
(LAMP),
feet-meter selection
(FEET/METER),
and contrast
adjustment
(DARK/LIGHT).
To turn the
lights
on,
press
the
up
arrow
key.
To
switch from feet to
meters,
press
the down arrow
key
when the
proper
menu
appears.
To
adjust
the
contrast,
wait for the DARK/LIGHT
menu to
appear.
Now
press
the
up
arrow
key
to darken the
screen,
the down arrow to
lighten
it. The menus
disappear
after a few sec-
onds. If
you
don't want to
waft,
press
the ON/CLEAR
key
to clear the
menus from the screen.
When the X-25 is first turned
on,
the
display appears
similar to the one
below. The unit is in the automatic mode and the Fish ID feature is on.
The
depth range displays
on the left side of the screen. In this ex-
ample,
the
range
is from 0 to 60 feet. The
digital
bottom
depth display
shows at the
top
left
portion
of the screen.
'ii--
37,3FT
4-c
Most fish don't
spawn
unless the water
temperature
is within rather
narrow limits. The surface
temperature
meter built into the X-25
helps
identify
the desired surface water
spawning temperatures
for various
species.
Trout can't survive in streams
that
get
too warm. Bass and
other fish
eventually
die out when stocked in
lakes that remain too
cold
during
the summer. While some
fish have a wider
temperature
tolerance than
others,
each
has a certain
range
within which it tries to
stay. Schooling
fish
suspended
over
deep
water lie at the level that
provides
this
temperature.
We assume
they
are the most comfortable
here.
20
MENUS
The X-25 uses menus to
guide you through
the
unit's
functions
and
features. The menu
key
accesses these
features, allowing you
to
customize the unit to
your particular
needs and water conditions. All
you
have to do to leave one menu and enter
another is
press
the menu
key repeatedly.
If
you
ever
get
lost in the
menus,
simply press
the
ON/CLEAR
key.
This clears the menus from the
screen,
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