Assuming that you drive already geared up like all normal divers do: if you drive from Tampa and you find yourself underwater for an extended period of time after 2 1/2 hours, turn your air on and try to conserve your gas. You drove into Lake Okeechobee by mistake instead of the Atlantic Ocean. The good news is that you're in fresh water so your car won't corrode too badly - just don't turn it off for a few hours after you surface in Palm Beach county. Five hours after heading SE from Tampa - stop and do not continue into the stuff that looks like water - that's the Atlantic Ocean. And this WILL corrode your car but you will be known forever after as the Wreck of the Missdirected.Missdirected:I never know where anything thing is; hence, MissDirected. I am horrible with directions.