I looked more closely at pics of one of those and posted on it. To me it looked like it was lacking the necessary escape routes I would like to see. But then I have gone through the ice on a snowmobile. Yes, idiot oil was involved so whatever. :) luckily the water was just shallow enough for me to put my chin in the water and grab the hand loops on the tip of the skis and keep sitting on the ice and break it until I got it into shore. Then I pulled the plugs and tipped it over as far as I could and pulled the started cord enough times to get the water out of the engine.
It run and we got back to the cabin. It was cold but the snowmobile suit let a lot of the water run out but my boots were full. Sold that one.
If I went in that TT I'd be looking for kick out windows or hatches on darn near every side.
I can't imagine it being towed out by anything but a 4x4 truck etc so it also gets into insurance coverage if the truck goes in. People do it all the time but...