discussion thread on a sailing forum
Back in the day of newsgroups there was a rather noisy one I lurked on once in a while. It was very east coast US oriented which made it rather boring for someone in Blighty.
Still there was one thread where someone suggested that they could weatherproof their PC by filling it with closed cell foam. There were some jokes about how it could double up as a lifejacket but I never heard how quickly it cooked itself.