Bait school 
Fig. 1
Fig. 3
Fig. 2
Fish
arches
Fig. 4
These figures show results of different sensitivity levels on the same location. Fig. 1: Sensitivity at 85 percent, determined by Auto Sensitiv- ity. Typical of full auto mode. Fig. 2: Sensitivity set at 71 percent. Fig.
3: Sensitivity set at 47 percent. Fig. 4: Sensitivity set at 90 percent.
Grayline®
Grayline lets you distinguish between strong and weak echoes. It al- lows you to tell the difference between a hard and soft bottom. For ex- ample, a soft, muddy or weedy bottom returns a weaker signal which is shown with a narrow line or no gray line at all. A hard surface returns a strong signal, which will be displayed as a wide gray line.
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