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Thanks guys for replies, I called Vexilar today and he said it would be good for locating structure and drop offs also. I was thinking it would help mark fish. He suggested going with the 12 deg high speed transducer. My other fear is that I will hurt or screw up my vexilar, this is the most money I have spent on fishing equipment but glad I purchased because it really helped with my son catching fish on the ice. Scheels sells a lowrance fish finder for $100 and I would not be afraid to take it in the boat. Never thought I would miss ice fishing but I do, we had good times in the ice hut this year catching fish.