Posts: 337
Location: Watersmeet, Michigan | Hi all. Went out to a lake I've fished many times before (only 140 acres) and have the same sort of interference occur to both my Humminbirds every time I go there. It NEVER happens anywhere else. I get a sort of "pulse" on the screen, like the one below in the picture, except that it's very regular - about every five seconds. It's much stronger on the south end of the lake, and eventually dissipates as I move north.
Has anyone seen such a thing before, or have I discovered a window to the Twilight Zone?
Fr. K
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