What do the colors mean on the Forward Scanning Sonar?
The colors indicate STRENGTH OF RETURN. In the iScan series, stronger returns are indicated by stronger colors. Each Forward Scanning Display has a Color Scale to assist in understanding the strength of the returns you see on the screen. The scale ranges from Dark Red through Yellow to Light Blue. Red returns are the strongest returning signal. The scale on the display provides examples of the 12 possible colors in the range of returns. If the Gain is adjusted properly, the colors can provide an indication about hardness or density of a sonar return. At the same depth, a soft mud bottom provides weaker returns than a hard rock bottom. At the same range, a metal container provides a stronger return than seaweed. Note that color does not indicate depth. A protrusion such as a submerged piling can also be scanned in the water column. Learning the difference between a piling and a marlin is a matter of knowledge and experience. When the Gain is in the Automatic mode, it adjusts for the bes
