GPS stands for Global Positioning System and is used primarily to locate features on the earth. The system is a constellation of between 24 and 32 medium earth orbit NAVSTAR satellites that transmit precise radiowave signals that enable GPS receivers to determine their current location, time, and velocity (including direction), anywhere on earth. GPS NAVIGATION This is the utilization of GPS technology to assist in the arrival at a final destination from an initial location. Timely, automatic instructions are issued via map illustrations, text, and voice commands, offering the user turn by turn directions to a desired destination. Mona GeInformatics Institute (MGI) has created a GPS navigation dataset for Jamaica called JAMNAV. The JAMNAV dataset contains:

• Over 18,000 kilometers of navigable roads
• Over 20,000 Points of Interest (POIs) in 70 categories
• 3,212 settlements islandwide
• 20 base features

How to access Unit ID#

• Start Unit
• Select tools icon at lower right of screen
• Select settings icon at top left of screen
• Select systems icon at top left of screen
• Select about tab at lower centre of screen 

Unit I.D. # should appear as ten digit number in center of screen