All sonar sensors work as a combination of the physical sensor surface interacting with the environment and a block of computers processing that raw sensory data from the physical transducers into the sonar signal that we as humans read in the sonar display.
The particular acoustic geometry of the TA (how it works) means that an ambiguous contact is always generated when there is a real signal, it is a by-product of the way the array functions when it takes the physical sensor signal from the source and turns it into processed sonar data that we can read.
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