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E-Series Networked Display Reference Manual
6.3 Operating the fishfinder
The fishfinder provides you with four preset configurations, available on the default
toolbar. These are tailored to provide optimal operation in different circumstances -
you should be able to find a preset that gives you excellent results in any situation.
The presets are labelled single, dual, shallow and deep. When you make a fishfinder
window active, the title bar shows you which preset is selected, along with its
settings.
Each preset has been configured to provide the best operating parameters for the
fishfinder. However, it is possible to adjust the presets if necessary.
To select a preset mode
1. Press the appropriate softkey.
6.4 Explaining the readout
The dark layers indicate a good echo; the lighter areas weaker echoes. This could
mean that the upper layer is soft and therefore allowing sound waves to pass to the
more solid layer below.
It is also possible that the sound waves are making two complete trips – hitting the
bottom, bouncing off the boat, then reflecting off the bottom again. This can
happen if the water is shallow, the bottom is hard, or gain is set too high.
6.5 Factors influencing the readout
The quality and accuracy of the display can be influenced by a number of factors
including boat speed, depth, object size, background noise and transducer
frequency.
D6855-2
A hard bottom (sand) produces a thin line
A soft bottom (mud or seaweed cover) produces a wide line.
The dark layer indicates a strong signal.
A rocky or uneven bottom or a wreck produces an irregular
image with peaks and troughs
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