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Gain settings for garmin 740S?

Old 07-06-2014, 03:52 PM
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Default Gain settings for garmin 740S?

Trying to set my 740 up for bottom fishing and I'm having a hard time distinguishing between sand and hard bottom. What percentage are you guys running for the gain? Mine is currently on "auto" which I know isn't the preferred setting (or is it?). Also, what is "a-scope"? Any help would be great.

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