I think that most who ice fish have had the experience of a person/house drill up right next to you even though there are few houses out and plenty of structure to be fished especially on Mille Lacs. If I can hear a guy or girl fart from inside the house they are too close. You know what I mean. I am not a person that needs 100yards around me. Try this, It has worked for me a couple times. Align your transducer at their hole. It will screw up there flasher with interference. I have an old one I bring along just in case I get into this situation. Fun too!
DTW
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