Bedienungsanleitung Navman Trackfish 6600 (Seite 76 von 83) (Englisch)

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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

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Navman Trackfish 6600 Seite 76

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