Actually, I know what PIE EIR is and I know what EIR PIE is. See, I know it backward and forward.
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I took this last weekend with a HB helix.
Attachment 267934
Seeing them 70 ft out in 5 ft of water is pretty good.......bet the beds out deeper are where the bigger ones are......I use my unit to find fish.
From the inventor:
Error
Ahh look,, Its a fish, that's been "found". Odd.
Actually, it is an image of an underwater object detected by sonar technology and displayed by using imaging processing as the sonar signal reflected the said object.