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Navman Trackfish 6600 Manual

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TRACKFISH 6600 Installation and Operation Manual 77
NAVMAN
B-3 Sonar fishfinding problems
3-1 The TRACKFISH operates erratically:
a Check that the transducer does not have
debris (e.g. weed, plastic bag) caught
around it.
b The transducer may have been damaged
during launching, running aground or
while underway with debris etc. If the
transducer has been impacted, it may have
been kicked up on the bracket. If it is not
physically damaged, reset the transducer
back to its original position. (See the
Transom Transducer Installation Guide.)
c When the transducer is less that 2 ft (0.6 m)
from the bottom, the depth readings may
become inconsistent and erratic.
d Manual Gain may be set too low, which may
cause weak bottom echo or no fi sh signals.
If in Manual Gain, try increasing the Gain.
e Ensure the back of the bottom surface
of the transducer is slightly lower than
the front and the front is as deep in the
water as possible in order to minimize the
generation of bubbles through cavitation.
(See the Transom Transducers Installation
Guide.)
f Check the transducer and power cable
connectors at the back of the display unit
are securely plugged in and the collars are
locked in place. The collars must be secure
for watertight connection.
g Inspect the power cable from end to end for
damage such as cuts, breaks, squashed or
trapped sections.
h Ensure there is not another fishfinder
or depth sounder turned on, which may
interfere with this TRACKFISH.
i Electrical noise from the boat’s engine or
an accessory may be interfering with the
transducer(s) and/or the TRACKFISH.
This may cause the TRACKFISH to
automatically decrease the Gain unless
using Manual Gain.
The TRACKFISH thus eliminates weaker
signals such as fi sh or even the bottom
from the display. This may be checked
by switching off other instruments,
accessories (e.g. bilge pump) and
the motor until the offending device is
located. To stop problems from electrical
noise, try:
- re-routing the power and transducer
cable(s) away from the boat’s other
electrical wiring.
- routing the display unit’s power cable
directly to the battery with an in-
line fuse.
3-2 Bottom is not displayed:
a The TRACKFISH may have Manual
Range selected and the depth may
be outside the range value selected.
Either change the TRACKFISH to Auto
Range or select another depth range
(see section 8-5).
b The depth may be outside the TRACKFISH’s
range. While in Auto Range, the display unit
will display “--.-” to indicate that there is no
bottom detected. A display of the bottom
should reappear when in shallower water.
3-3 The bottom is displayed too far up
the screen:
The TRACKFISH may have Manual
Range selected and the selected
Range value is too high for the depth.
Either change the TRACKFISH to Auto
Range or select another depth range
(see section 8-5).
3-4 Bottom echo disappears or erratic
digital reading while the boat is moving:
a Ensure the back of the bottom surface
of the transducer is slightly lower than
the front and the front is as deep in the
water as possible in order to minimise the
generation of bubbles through cavitation.
(See the Transom Transducers Installation
Guide, for more information.)
b The transducer may be in turbulent water.
Air bubbles in the water disrupt the echoes
returned, interfering with the TRACKFISH’s
ability to fi nd the bottom or other targets.
This often happens when the boat is
reversed. The transducer must be mounted
in a smooth fl ow of water in order for the
TRACKFISH to work at all boat speeds.
c Electrical noise from the boat’s motor can
interfere with the TRACKFISH. Try some
suppression spark plugs.
3-5 There is a double bottom
trace displayed:
a The boat may be in an area that
… 76 …


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Navman Trackfish 6600 User Manual - Spanish - 81 pages


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