The number of devices that contain GPS units has increased, since GPS technology begins, such as a GPS unit installed

Portable GPS System

in car, in boat etc.

The devices that contain portable GPS systems are used for emergency, business purposes and other very serious matters even as a fun stuff.

• Today, the mobile phone is a device that is most likely to contain GPS system, that useful to give their location in emergency case if they would call 911.
• The people that work in delivery business, sales, repair and other job that need to find their way around, are use to track their positions and keep track of their phone calls with PDA.
• Some software can create routes that are efficient by grouping customers together by their location that used in conjunction with GPS units.
• A portable GPS system also use by surveyors to map fields, plan roads and set survey boundaries or markers.
• Laptops can also be equipped with a Global Positioning System and software to use the signal for mapping, traveling and many other purposes.
• Fire services and Police also find new ways with different types of portable GPS system to save lives every day.
• You can use GPS system to track your own position, the position of someone or something else too. Even, the smaller GPS units can be used to track pets and other things that might get lost.
• Competitive glider pilots use portable GPS units to present proof that they reached the race markers.
• Geocaching is a game that is played using hidden emitters a GPS signal and players with PDAs compete to find it.
• Camera and Watches today can be found with GPS system, the possibilities of their uses are seemingly endless.

Just thought you may be interested in reading this guide: A Review of Garmin Nuvi 255W 4.3-Inch Widescreen Portable GPS Navigator and In Car GPS Navigation Systems Make Reaching Your Destination a Breeze!