Toughbooks

My job has me working in temperature’s of down to minus 20 Fahrenheit and sometimes around six feet of water. So what I am looking for is a fully equipped laptop that can handle those kind of frigged temperatures and can handle, at most, the pressure of being plunged six feet into the water.

I’ve looked around places like Dell, Panasonic and other companies that sell tough books and their ads in Google claim water proof and water resistant and withstand frigid temps but when I click the link to look at the information, nothing about water or temperatures can be found.

Anyone know of any laptops out there that can withstand the type of specs I am looking for?

Budget is not an issue.