Getting lost at sea
“But I have GPS,” you say. Nice try. GPS fails ALL. THE. TIME. And boaters who depend on it often disappear like Tom Hanks, or the cast of Lost. About 1,000 people get lost at sea every year, from both private and commercial sectors, and most of them were using some sort of navigation system.
Decompression sickness (the bends)
Nothing ruins a fun day of diving than a considerably less-fun afternoon in a decompression chamber. But that’s what happens when you try and surface too fast at the end of a long dive. And while only about one in 10 cases of the bends is fatal, it still happens on about one in every 7,400 dives, killing 76,900 people. So relax, ascend slowly, and make the requisite safety stops.