Fish icons are fun when you start using Deeper sonar. After getting better at reading sonar, anglers realize there is a whole world of information hiding beneath these icons.
Let’s switch them off and check out the arches – raw sonar readings which represent fish.
a) Full arches appear if fish move through the full sonar cone.
b) Half-arches or thick dashes appear if fish move partially through the cone.
c) If your sonar and fish are both stationary, you will see a straight line.