I need more facts about the GPS and compass to use in my writing piece.

Answer 1

http://adventure.howstuffworks.com/outdoor-activities/hiking/compass-or-gps.htm

Answer 2

Did you see the site I posted for you about the GPS?

http://www.jiskha.com/display.cgi?id=1266962635

Answer 3

Here is a fun activity you can read about. My Girl Scouts love to do this.
http://www.geocaching.com/