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
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