2. Navigation before GPS
landmarks

3. Navigation before GPS
land in sight

4. Navigation before GPS
starry
skies

5. Navigation before GPS
sextant

6. Navigation before GPS
chronometer

7. Radio navigation systems:
Navigation before GPS
Radio navigation systems:
LORAN
Radio navigation systems:
LORAN

8. Navigation before GPS
TRANSIT satellite

9. NAVSTAR Global Positioning System
GPS
NAVSTAR Global Positioning System

10. GPS
manpack

11. GPS Precision Lightweight GPS Receiver (PLGR)

12. GPS
So how does it work?
Click the magnifying glass

13. Geocaching . Started in May 2000 ‘Geo” means “earth/geography”
“Cache” means “container”
As of August 2007 there were caches worldwide!
Free- you don’t have to have a GPS receiver, but it sure does help!

14. How Geocaching Works
Geocacher searches by zipcode for caches in a certain area (or city or state or latitude and longitude)
Uses the GPS receiver to locate the cache
Open cache, sign logbook, trade items if you want to
Replace cache as it was found
Log find on the website

15. Geocaching Rules CITO- Cache In, Trash Out Leave no trace www.LNT.org
No food or candy
Don’t “trade down”
Don’t give away the hide in the logs
Adhere to the creed

16. Geocaching Lingo TFTC- Thanks for the cache!
TNLNSL- Took nothing, left nothing, signed log
FTF- First to find!
DNF- Did not find 
Swag- goodies found in cache
“Muggles”- people who don’t know about geocaching

17. Types of Caches Micros Regular/small Multicache Virtual Where’s George
Letterboxing

18. Trackables Travel Bugs Geocoins Promotionals Jeep 4x4
Unite for Diabetes

19. Google Earth Where do I get it?
Free download at
Uses satellite imagery
Information is shared with KMZ and KML files