(Optional) Explain global positioning system (GPS).

Explanation should include a

• definition of GPS
• description of how GPS works
• demonstration of a handheld GPS
• comparison of handheld GPS to mounted/installed GPS units.

Process/Skill Questions:

• What is the history of GPS?
• What was the original purpose/use of GPS?
• What agencies use GPS?
• Which came first, handheld units or large, installed units? Why was this so?
• Who is responsible for creating/updating GPS and maintaining its database?