Brief Explanation and History of Fish finders: Fish finders are basically a type of SONAR (sound navigation and ranging). Fish finders use active (rather than passive which does not produce the sound) sonar to detect fish. Fish finders also detect the bottom of the ocean or lake, and everything else that reflects the sound beam.
When fish are not biting, usually the thing that is required before fish bite again is patience unless if the bait is ...
