You can get them cheaper from boating sites.
They use them under big boats up north that don't get pulled in the winter.
They have bubblers and ice eaters under the boats. Keeps the ice from damaging the hulls.
It would cost way too much and be way too hard to keep one of them going.
Where I hunted for years, the water was only 1 ft. deep. No where to hide that big thang.
Plus, you have to have a couple batteries close by, and an inverter.
If'n you have one of them things, you are desperate to kill birds.
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