Water is great stuff to take with you when you set out on an off road trip, but only if it’s in the right place. Water in your storage containers or your billy is good; water in your sleeping bag is not. Worst of all? That would be water in your engine. It’s depressingly easy to get water in your engine. If the intake goes under while you’re crossing a river, that’ll do it right away. A snorkel avoids that risk, but there’s another one to consider.