Geocaching

= = = = = I think Geocaching is very useful. = =Geocaching is use 'GPS' for find something or some where.= =And= =The **Global Positioning System** (**GPS**) is a space-based global system.= =that provides reliable location and time information in all weather= =and at all times and anywhere on or near the Earth when and where there is an unobstructed line of sight to four or more GPS satellites.= =It is maintained by the Unite states government and is freely accessible by anyone with a GPS receiver.= =GPS was created and realized by the DOD and was originally run with 24 satellites.= =It was established in 1973 to overcome the limitations of previous navigation systems.= =We went to the Pigeon Mountain on foot at 2010/07/27.= =I was in B2 group.= =There were 4 students in my group.= =I didn't know them well.= =I found many stickers.= =When i found stickers i was so happy!= =And i found 4 containers.= =It was so funny time.^O^=