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The 2-9500 lets
you
measure the water
depth
from the surface to the
bottom with the Positive Keel Offset feature. It works
by adding
the
depth
of the transducer to the bottom
depth.
In other
words,
if the
actual bottom
depth
from the surface is ten
feet,
but the transducer's
face is two feet beneath the
surface,
then the 2-9500 thinks the bottom
is
only eight
feet
deep.
Using
Positive Keel
Offset,
two feet can be
added to
this,
making
the Z-9500
display
the true bottom
depth
of ten
feet. This is useful when
navigating using
charts and
you
need to know
the exact water
depth
as marked on the chart.
To use the Positive Keel
Offset, press
the MENU
key.
Next,
press
the
key
next to the 'More" label two times. Now
press
the
key adjacent
to
the "Keel Offset" label.
Finally, press
the
key adjacent
to the "Pos.
Keel Offset" label. A menu
appears
over the sonar screen that
says
"Enter Keel Offset 0.0" Since the transducer's face in our
example
boat
is two feet
deep, press
the
key adjacent
to the 2
label,
then the
key
adjacent
to the 0 label. The numbers "2.0"
appear
in the Enter Keel
Off. window.
Now
press
the
key adjacent
to the
ENTER
label.
The Z-
9500
will
automatically compensate
for the two foot difference and
display
all
depth
information as if the transducer was two feet shallower
than it
actually
is. For
example,
if
the Z-9500
displayed
the water
depth
as 8 feet before
changing
the keel
offset,
afterwaids it would read ten
feet. This is the actual distance from the water's surface to the bottom
using
our
example.
SYSTEM INFORMATION
The code contained
in
the Z-9500 is numbered. This information can
be obtained
by pressing
the MENU
key,
then the
key adjacent
to the
"More" label two times.
Next,
press
the
key adjacent
to the
"System
Info" label. A
message
similar to the one below will be
displayed.
2-9500
Version: 3.0
Copyright
1990
Eagle
EIectinics
If
a loran
module is connected
to the
Z-9500,
then it's version number
is
included,
also. Press the
key adjacent
to the CLEAR label to erase
this
message
and return to
the sonar screen.
r
Turn Auto ASP On
Turn Man. ASP On
Set
TD OFfset
Set
Lat/Long
ASF•
I
I
I
I
Turn ASF Of' F
a
turn the automatic ASF feature
on,
or turn ASF's off.
Manually entering
the ASF correction
automatically
turns the ASF feature on.
Automatic ASF
If
you
wish to use the automatic ASF
feature,
simply press
the
key
adjacent
to the "AUTO ASF ON" label. If
you're
in an area that is
covered
by
the ASF table built into the
Z-9500,
it will
automatically
add
the ASF's to
your present position.
The ASF indicator will also
appear
on the
position
screen on the
latitude/longitude position display.
If the
Z-9500 doesn't have ASF tables for
your
location,
the ASF indicator
won't show and ASF will be off. A
message appears warning you
that
ASF's are not available. You will have to
manually
enter the ASF as
shown below.
Latitude/Longitude
ASF
Correction
Use the
latllong
ASF correction if the
latitude/longitude position
shown
oq
the
display
is
slightly
different than
your known, precise position. (It
th
displayed position
is off
by
a
large margin,
the
Alternate/Primary
feature
may
need to be
switched.)
For
example, suppose your
actual
latitude/longitude
is
38-25-40/81-34-10,
but the Z-9500
displays
38-24-
30/81-35-20.
Simply
enter
your
actual
position,
and the Z-9500
will
handle
the rest.
To
change
the ASF
using
the
latitude/longitude correction,
you
first must
be in
the location
you
are
changing. Next, press
the
key
adjacent
to the
42
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