3. The water
may be
deeper than the sonar's ability to find the bottom. If
the sonar can't find the bottom signal
while it's in the automatic mode,
the
digital will flash
continuously. It
may change the
range
to limits far
greater
than the
water
you are in. If this happens, place
the unit in the manual
mode, then
change the range to a realistic one, (for example, 0-100
feet)
and increase the sensitivity.
As
you move into shallower water, a bottom
signal
should
appear.
4. Check the
battery voltage. If the
voltage drops, the unit's
transmitter
power
also drops,
reducing its ability to find the bottom or
targets.
Bottom echo
disappears
at
high speeds or
erratic digital
reading or
weak bottom echo
while boat is
moving
1. The transducer may
be in turbulent water. It must be mounted in a
smooth flow of water in order for the sonar to work at all boat
speeds. Air
bubbles in the water
disrupt
the
sonarsignals, interfering
with its ability
to
find the bottom or other
targets. The technical term for this is
Cavitation.
2. Electrical noise from
the boat's motor can interfere with
the sonar. This
causes the sonar to automatically increase its Discrimination or noise
rejectionfeature. This can causethe unitto
eliminateweakersignals such
as fish or even structure from the display. Try using
resistor spark plugs
or
routing the sonar unit's
power
and transducer cables away
from other
electrical wiring on the boat.
No fish arches when the
Fish
ID feature is off:
1. Make certain transducer is pointing straight down. This is the most
common problem
if a
partial arch is
displayed. See the Fish Arch section
in this manual for
more information.
2. The
sensitivity may
not be high enough. In order for the unit to
display
afish
arch, it hasto be able to receivethefish's echofrom thetime itenters
the cone until it leaves. If the sensitivity is not high enough, the unit
displays the fish
only
when it is in the center of the cone.
3. Use the Zoom feature. It is much easier to display fish arches when
zoomed in on a small range of water than a
large one. For
example, you
will have much better luck seeing fish arches with a 30 to 60 foot range
than a 0 to 60 foot
range. This
enlarges the
targets, allowing the
display
to show much more detail.
4. The boat must be moving at a slow
trolling speed to see fish arches.
If the boat is motionless, fish stay in the cone, showing on the display as
straight horizontal lines.

Th9

5 1MI 100
-

-

D$ :n'vui :i DtB1fl ;U
O
tfram
'—r
FISH 36. FTI DEPTH 46.1
GROUP "H"
I MI I
0.15 *te
HH:MM:SS
OO01O •:)DrflI(eI
45
I,i,piiAni,i Iou,, Au,,
Ei
J MI I
L 0.14
GROUP "I"
GROUP "J"
H
Ui E rr'
S 1MI
s:s'a
I JOLTS I r
15.4 100
GROUP "K"
H H
S1MI 9
•:R4'I:IU 11*1
S 22
,,,6,,,,i,lu,i
.i,,,,,,, I,,.,, 6 45
A ,,,,,,I sun6'..,,, Ii,,,,, 6,,,
RtM
GROUP "M"
• oi
I FEET I
51.1
;i .—
---a
I °F I '
65.5 100
GROUP "L"
GROUP "N" GROUP "0"
40 37
PDF compression, OCR, web-optimization with CVISION's PdfCompressor