An post written by Tonyt and placed in these useful Camping Tip Articles to help others.

A brief introduction for those who may be new to the world of GPS and it's Sat Nav uses.

Global Positioning System is a satellite based radio navigation system operated by the USA.

Positions are marked at the crossing point of a line of Latitude and a line of Longitude.

Latitude is a geographic co-ordinate that specifies the north-south position of a point