Garmin Fishfinder 90 Owner's Manual - Page 9

Understanding the Fishfinder Screen Experimentation and experience are the keys to successfully interpreting your Fishfinder screen. We recommend that you take your Fishfinder out on familiar water, and spend time learning to interpret what you see on the Fishfinder 90 or 140 screen. Think of the Fishfinder screen as if you took a picture from the side of an aquarium in your home. You can see how deep a fish is in the water (how close it is to the top or bottom), but you cannot tell where the fish is located horizontally in the water (whether it is near the front or the back of the aquarium). Remember this when you are trying to locate exactly where something is in the water. Fishfinder 90/140 Owner's Manual GETTING STARTED > UNDERSTANDING THE FISHFINDER SCREEN Water depth Water temperature at the transducer Depth range You see suspended targets as arches or fish symbols. Structure Simulator mode indicator Bottom shape and type The strongest sonar returns appear on your screen as solid, dark areas. The weakest returns appear less intense, less solid. The bottom of the water body returns the strongest signal, so you can identify the bottom as the continuous, solid line running across the bottom of the screen. The strength of the sonar return can also help you interpret the hardness of the bottom. The thicker the bottom line, the harder the bottom. 3