Getting the most out of your Deeper
How do you know if an underwater object is hard?
It is possible to recognise a hard object based on factors such as the second reflection and colour. In the daytime palette, the colour ranges from blue/purple (softest surface – weak signal) to red, orange, and yellow (hardest surface – strong signal).
The second reflection from the object is also a good indication of its hardness. A hard object will reflect a signal in a strong manner, and it will bounce between the surface and the bottom. This is an additional indicator that can tell us how hard the surface is.
In our case, the sonar displayed vegetation and (1) small fish (fry) in blue/purple colour.
The very hard (2) object. Please note that in addition to the strong signal, the sonar also draws a weak signal that the object emits. Therefore, the entire area of the object is highlighted with all signals.
Reflection from a solid object (3). The sonar duplicated only the most powerful signals that were reflected from the object. On the scan, it looks like number (3).
Colour (4). The colour also represents the signal strength. Yellow colour on the daytime colour palette indicates a strong reflection of the signal.
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