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narrow
or
no
gray
line.
A
hard bottom returns a
strong signal
that
turn the alarm Sound off until the shallow alarm is
triggered again.
causes a wide
gray
line.
If
you
have two
targets
of
equal size,
one with
gray
and the other
without,
the
target
with
gray
is the
stronger
echo. This
helps
distin-
guish
fish from
structure,
or the
larger
fish from a smaller one.
GRAYLINE
®
is
adjustable.
Since it shows the difference between
strong
and weak
echoes,
changing
the level
may require
a different
sensitivity setting.
To
change
the GRAYLINE
level,
first
press
the MENU
key
until the GRAYLINE menu
appears.
Now
press
the
up
arrow
key
to
increase the
level,
the down arrow to
decrease it. The bar
graph
in the GRAY-
LINE
menu box shows the level now in
use. Echoes
scrolling
onto the screen will
also show
the effects of the GRAYLINE
change.
If
you
reach the maximum or
minimum
level,
a tone sounds
alerting you
to the limits.
The level chosen
by
the X-25 when it's first
turned on is
usually adequate
for
most conditions.
Experiment
with
your
unit to find the GRAYLINE
setting
that's best.
FISH
ID
FEATURE
The
Fish
ID
feature identifies
targets
that meet certain conditions as
fish. The
micro-computer analyses
all echoes and eliminates surface
clutter,
thermoclines,
and other undesirable
signals.
In
most
in-
stances, remaining targets
are fish. The Fish
ID
feature
displays
symbols
on the screen in
place
of the actual fish echoes. There are
four
symbol
sizes:
tiny, 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,
etc.
The
micro-computer
is
sophisticated,
but it can be fooled. It can't
distinguish
between fish and other
suspended objects
such as
turtles,
submerged
floats,
air
bubbles,
etc. Individual tree limbs
extending
outwards from a
group
of limbs are the hardest
objects
for the Fish ID
10
To turn the alarm
off,
press
the menu
key
until the shallow alarm
menu
appears.
Then
press
the
up
arrow
key
until the word "OFF"
appears.
The alarm is now off.
LAMP
Deep
Alarm
The
deep
alarm
adjusts
the same as the
shallow alarm. Use the "DEEP ALARM"
menu to
adjust
the
deep
alarm. When the
bottom
signal goes deeper
than the
setting,
an alarm tone sounds.
The
X-25's
display
is
backlighted
for
night
use.
To turn the
backlights
on or
off,
press
the menu
key repeatedly
until the
LAMP
menu
appears.
Now
press
the
up
arrow to
turn the
lights
on or the down arrow to turn
them off. The menu will clear automati-
callyafter
a few seconds or
you
can
press
the ON/CLEAR
key
to clear the screen.
FEET/METER
The X-25
can show the
depth
in feet or
meters. When the unit is in the metric
mode,
all
depth readings, ranges,
zooms,
and alarm
settings
are in meters.
Speed
displays
in knots and
log
is in nautical
miles.
Temperature
is in
degrees
Celsius.
When it's
in
the feet
mode,
all of the
above
settings
are in
feet,
miles
per
hour,
and statute miles.
Temperature
shows in
degrees
Fahrenheit.
15
373FT
tt
:-C
. ______
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