So, got caught in a generous rainstorm while fishing. Got into my Micra and tossed my wide brim hat unto the dash, its usual home.
WARNING. Water dripped off the brim and drowned the radio. Didn't notice until I was 20 km down the logging road as no reception and bumpy enough to notch CDs. The screeching was unbelievable. It continued with the radio off and the display dead.
Two weeks now and it hasn't dried out.