Specifications

DISPLAY INTERPRETATION
Now let's look at
the
display.
First,
we'll
turn on the Z-7200
by press-
ing
the ON
key.
The
lights
will flash for
six
seconds.The chart is now
scrolling
the return
echoes across the
screen
and the
digital
is
searching
for
the
bottom
depth.
It's
flashing
0
because
it hasn't found
the bottom
yet.
Once
it finds the
bottom,
the
depth
is
dis-
played.
Here the Z-7200 has
found
the bottom at 49
feet. The
range
is
zero to
60 feet. It
automatically
chooses a lower limit that
places
the
bottom
signal
near the
bottom of the
display.
The bar
at the
top
of the dis-
play
is the
sensitivity
bar. It shows the
sensitivity
in use.
The bar
extends
from left to
right.
A
very
short bar
indicates minimum
sensitivity. Setting
the
sensitivity
to maximum causes
the bar to run
completely
across the
top
of the
display.
The word AUTO indicates the
Z-7200 is in the automatic
mode.
The
top
line of the
display
is
always
a dashed line. It moves
from
right
to
left,
showing
the chart is
moving.
As the chart
speed
increases or
decreases,
the
dashed line
changes
speed accordingly.
The word 'STOP"
appears
when the chart is
stopped.
The
range
is both an
upper
limit
and a lower limit
at the
top
and
bottom of
the
display, respectively.
In
this
example,
the
range
iso -60 feet.
Scale
markers
printed
on
both sides of the
display help
deterrnine the
actual
depth.
For best
results,
read
the
Qperation
section
of this manual. It
explains
in detail all of the
functions that are in this
section,
plus
other
features
not discussed
here.
The
temperature
of
water in the lake is seldom constant from
top
to bottom.
Layers
of
different
temperatures
form,
and the
junction
of a
warm
and cool
layer
of
water is athermocline. The
depth
and
thickness of
thethermocline can
varywith
the
season ortime of
day.
In
deep
lakesthere
may
be two or more at different
depths.
Thermoclines are
Important
to
fishermen because
they
are areas
where fish are active.
Many
times bait
fish will
be above the
thermocline while
larger game
fish will
suspend
in or
Just
below it.
The Z-7200 can detect
this invisible
layer
In the
water,
but
the
sensitivity
will
probably
have to be turned
up
to see it.
A
knowledge
of the
water
temperatures
various fish
prefer,
and in
which
they usually remain,
helps you get
the most from
your
Z-7200.
SURVEYING A LAKE
The most successful
anglers
on
any body
of water are those
who
fish it
day
after
day
and
year
after
year.
Eventually, they
learn the hot
spots
that
produce
fish
consistently.
They
discover
through experience where.
and
atwhat
depth, theycan expectto
findthefishtheywant
at
anyseason.
And
they
realize that these
productive
areas
change throughout
the
year
depending
on water
level,
temperature, food,
and other factors.
With
the
Z-7200,
anyone
can
eliminate
guesswork
and concen-
trate on
the areas where fish are
likely
to be. Even if it's the first time on
the
lake!
The most efficient
way
to become
acquainted
with a
body
of water
isto
survey
it
with
your
Z-7200. Start with a
map
of the
lake,
if
possible,
and
indicate the
promising spots
in
relation to landmarks on
shore.
As
you go
about
your
survey, your
Z-7200 will
tell
you
the
depth
and
type
of bottom. It will also
reveal
suspended
fish.
Multiple signals
on
the
dial
usually
indicate a
good
school of fish and it's worth It
to
stop
and
fish for
them. You
may
not
get
any
further.
Keep
a few
marker
buoys
in the
boat,
ready
to toss overboard.
When
the Z-7200 indicates
a school of
fish,
throw the
buoy
out. The
string
will
unwind until the sinker
hits bottom.
Then, because of the marker's flat
shape,
It won't
unwind
any
further. With the
school thus
marked,
you
can
make
your
turn and
come back to fish in
exactly
the
right spot.
This is
essential when
you're
far from shore on a
big
lake. Unless
you
mark the
school of fish when
you're
over
it,
you may
not be able to find it
again.
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