I'm in TN. It doesn't usually even freeze enough to walk on ponds. Back in '77, tried to do a waterborne exercise in M113s, at minus 10 at Fort Knox. First one was trying to break the ice. It would rise up, chewing off the ice, then settle back down. Kept doing until it climbed out approaching 45 derees before 11 tons snapped the ice and broke the surfboard off, like it was plywood. OK, it really is plywood

. It nosed under water, dumping 6 inch ice and freezing water poring into the driver's hatch. You never saw a driver and a Track Command, snatching CVC helmets, commo cords and diving for the ice, so fast in your life, before it righted itself and started shooting out streams of water like a coastguard cutter doing a port salute, as the bilge pumps did their job. Driver was ok, just half frozen, TC busted a knee cap, as at 45 degree angle, he was a lot high above the ice when he dived for it. That, pretty well ended my experience with vehicles on ice.