The garmin etrex legend cx is also waterproof, which means that you can use it even if its pouring down rain. Or, if you happen to be trekking through a river or some other body of water, and you happen to drop it, youll easily be able to find it and use it again. Boaters will also find it handy as they can use it to track where theyve been and where theyre going without having to worry about it falling into the water. Not many GPS devices can claim the same thing and that makes the garmin etrex legend hcx extremely useful for anyone who likes traveling where there may be water involved.