hull".
Make sure the hull of the boat is a single layer construction.
7-
Also any air trapped in the lamination of the fiberglass
would prevent the sonar signal from passing through,
which will cause no depth readout.
Bottom disappears, suddenly weakens, when the
boat moves at high speed.
The sonar might be in turbulent waters. See the installa-
1-
tion guide and adjust the transducer position to a smooth
flow of water.
Electrical noise from the boat's motor can interfere with
2-
the sonar, which will cause weaker signals being elimi-
nated. Try to increas the Noise Reject level or routing
Fishfinder"s power and the transducer cable away from
the electrical source.
Nothing appears on the display whereas fishes
are seen under the transducer.
Check the transducer installation to make sure it is in-
1-
stalled properly. An incorrect installation may cause a
loss of the sonar signals.
Oil, dirt and fuel might form a film on the transducer and
2-
consequently reduce its effectiveness. Cleaning the face of
the sensor might help.
Electrical noise from the boat's motor can interfere with
3-
the sonar, which will cause weaker signals being eliminat-
ed.
The display is so cluttered that a clear bottom can not
be achieved:
Water is too much low.
1-
Echofish 600 – Installation & Operation manual
37