DEPTH LINES
The Z-9500 can print depth lines across the screen to make it easier for
you to determine a
target's depth.
-
_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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