Fish ID+ uses advanced sonar processing to interpret sonar returns,
and displays a Fish Symbol when very selective requirements are met.
When a fish is detected, a fish icon and its depth are displayed above
the return that has been classified as being a fish. Three different
fish icons represent intensity of the sonar return, and provide an
indicator of relative fish size.
DualBeam PLUS™ equipped models represent targets detected in the
200kHz narrow beam as Orange Fish Symbols, and represent targets
detected in the 83kHz wide beam as Blue Fish Symbols.