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just don't get caught!!
Two holes
First off ditch the support cable from the bird it doesn't allow the transducer to hang straight and you lose signal. I use a 6" hole all the time I keep the ducer just above the bottom of the hole and to the side. This eliminates a lot of tangles I do pull the ducer for better fish though. If you can the float also you will be even happier. Make an arm for your ducer to hang from.
No float no arm. Let hang from the cable just long enough to get to the bottom of you hole. You probably have 8 inches of ice and 2 feet of cable.