Understanding Sonar 3/19/2016 On March 19, 2016
Sonar Training Humminbird Snapshot
Black arrow is a fish close to the bottom
Red arrows are air bubbles
Green arrow is bait or fish on edge of sonar cone
Fish close to the bottom display as bumps on the bottom.
Air bubbles are caused by decaying matter at the bottom and show up as diagonal lines.
Bait or fish on the edge of the cone display as blurry and not dense with unusual looking arches.