Id probably contact Lowrance on that one. Most of us have never experienced that weather, nor want to ! Good luck, and wish i could help, D. I tried to look up the info, but all i can get is it will damage the lcd display, call Lowrance @ 800-324-0045 and ask them, D.Last edited by dbasketman on December 11th, 2007, 2:36 am, edited 1 time in total.