Letterboxing Store
Get Your "Get a Clue" Bumper Stickers Here!

GPS

Abbreviation for global positioning system. A network of satellites in orbit around the earth that constantly beam special signals back down to the planet. With the use of a special receiver (often a portable, handheld model), an individual can determine his/her geographic coordinates, often accurate to a few dozen feet. Geocachers uses GPS units to find hidden caches. See geocaching.


 

 

 

 

 

 

 

Glossary Index