Sonar targets which are not physically attached to the bottom may take one of many shapes. Surface clutter is the layer of water near the surface which is rich in algae and other growth, and often is aerated by wind or wave action. This area of water interferes with sonar transmission and often appears
Thermoclines are sharp differences in water temperature. These are easily identified by the continuous nature of the return.
ID+ adds an additional piece of information to help the user locate fish. On selected fish symbols, the digital depth of the designated
fish is drawn to help locate the fish vertically. This is especially helpful in setting bait depths or for downrigger operation.
A further method of differentiation of fish symbols indicates which of the two sonar beams the fish is detected in. This gives you a reliable indicator of side to side location relative to boat movement. Fish symbols which are hollow are detected in the Wide beam. Solid fish symbols represent fish which are detected in the Narrow beam, and these fish are directly under the boat.
