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DEPTH LINES
The Z-9500 can
print depth
lines across the screen to make it easier for
you
to determine a
target's depth.
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_I
Depth
Lines
TD ASF CORRECTION
To
change
the ASF
using
the TD offset
method,
press
the
key adjacent
to the "Set TO Offset" label on the ASF menu. The menu shown below
appears.
SELECT STATION
FOR
TO CORRECTION:
To turn the
depth
lines
on or off
again, press
the MENU
key
then
press
the
key
next to the "More" label.
Next,
press
the
key adjacent
to the
"Oepth
Lines" menu. Now
press
the
key adjacent
to the "ON" label to
turn the lines on.
Repeat
the
steps
above,
except press
the
key
next to
the "OFF" label to turn the lines off.
KEEL OFFSET
NOTE: The keel offset affects the
digital
sonar
only.
It does not
change
the
graph
scales.
Negative
Keel Onset
Many
times the transducer is not installed in the lowest
portion
of the
hull. Therefore,
portions
of the hull are
deeper
in the water than the
transducer.
This
poses
a
problem,
since
you
could
run
aground
when
the sonar unit is
showing
an
adequate
water
depth.
Most sonar units
(including
the
Z-9500)
read water
depth
from the face of the trans-
ducer.
However,
the Z-9500
gives you
an solution: Keel Offset.
Measuring
the
distance between
the lowest
part
of
the boat and the face
of the
transducer,
then
inputting
this value into the
Z-9500,
lets
you compen-
sate for the
depth
of the
boat.
The offset or correction in micro-seconds is shown for each
secondary
in the chain. Press the
key adjacent
to the station's letter that
you
wish
to
change
the TD offset. For this
example,
the
key
next to the "X" label
was
pressed.
The screen shown below
appears
next.
ENTER TO OFFSET:
(MICROSECONDS)
_____
I
:itc4
Now enter the desired TO offset. After
entering
the
values,
press
the
key adjacent
to the "Clear" label. The Z-9500 returns to the screen at
the
top
of this
page.
When the offsets for the stations have been
entered,
press
the
key
next to the "Enter label. The Z-9500 returns to
thte last used loran
screen,
using
the corrections
you
entered. Switch to
32
Clear
80
92KHZ
W: -9.99
X: -999
V: -0.33
Z: -a99
C
JC
lean
1 4
Enter
X:
nC
lean
40
97
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