Reminds me of the story of the Swedish champion who blasted a hole in his map case when he slipped and hit it on a rock during the epic US Champs race at Great Falls, MD in 1988. It was pouring rain and as the map took on water it deteriorated until a critical section became useless. He continued on, navigating from memory, but eventually stopped someone who was on
another course, begged a look at her map, and was then able to complete his course! I'm thinking this was
Jörgen Mårtensson, but someone will correct me if have that wrong. This map was so complex that in addition to the normal 1:15000 there was an enlargement of one area added at 1:7500.
Memory a bit fuzzy but I think he didn't win that particular day. But the meet was part of the
1988 USA O-Fest and he was still comfortably in 1st place M21A overall for the 6-day results.
Incidentally the 1988 USA O-Fest just happened to coincide with the release of the
Morris worm on the internet. A fact that I only learned upon returning to work after the conclusion of the O-Fest, having somehow forgotten to bring a smart-phone with me.