14 inches is safe, trouble is seeing that 6 inch patch at 40 mph.
Funniest one I ever saw was an old cadi buzzing around devils lake on spring day on 4 ft of ice. Running over
Tipups and causing all sorts of trouble until they nosed it into a pressure ridge at a 45 degree angle . Six drunk res locals emerged out the back windows demanding help. All they got was laughed at.