Sonar, down and side imaging, forward-facing sonar and GPS mapping: how fish finders work, how to read them and how to choose one.
Most fish finders ship on auto settings that work, but rarely work best. Here is what each important setting does and a simple routine for dialing your unit in on the water.
Most bad sonar readings come from the mount, not the fish finder. Here is how each transducer mounting option works, which boats it suits and how to avoid the common mistakes.
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