Portable GPS systems
Also, for those of you who hunt a...more
Every once in a while, you hear about hikers who get lost in the wilderness. A lot of times, they get into terrain and/or weather from which they can't extricate themselves. Most of the time, though, they just get plain-old lost. GPS solves that little issue. Also, for those of you who hunt and fish, marking good spots and accurately finding them again is a snap. For hikers, marking the start of a trail that you love is extremely useful; for birdwatchers, marking the hollow-nest of a prothonotary warbler or an eagle's aerie can help you get those elusive photos. In short, everyone who ventures outside city limits should own a GPS system.