These look like clouds or cluttered blobs. Large predators are often seen hovering around or underneath these clusters.
Provides a photographic-like image of structure (trees, bridges). 0a67281350343620.jpg
Replaces arches with little fish icons. While easier to read, it is often less accurate than manual interpretation. These look like clouds or cluttered blobs
Most fish appear as "arches." This happens because the fish enters the edge of the sonar cone (distance is long), moves to the center (distance is short), and leaves (distance is long again). and leaves (distance is long again).