| As scary as it may be, the US Department of | | | | wristwatch with GPS capability, for example, is a |
| Defense has been using satellite technology to | | | | great tool for those who enjoy outdoor pursuits |
| track the location of targets anywhere on Earth | | | | like hiking, fishing, and camping; it eliminates the |
| with pinpoint accuracy for the last thirty years. | | | | need for inconvenient maps. Having a GPS |
| GPS, or Global Positioning System technology, lets | | | | portable device in your PDA will be a great way |
| GPS portable receivers pick up transmissions from | | | | to help you find your way around strange cities |
| four of the twenty-four tracking satellites. By | | | | or find alternate routes when traffic is moving |
| interpolating the data from the four satellites, GPS | | | | against you. For more info see on GPS Tracking |
| portable receivers are able to get a very clear | | | | System. The Garmin handheld GPSMAP 60CSx |
| picture of their own longitude and latitude, as well | | | | uses the state-of-the-art SiRFstar III chip to give |
| as the correct time. To be able to function | | | | it a nearly instant link--usually less than thirty |
| properly, however, the GPS portable receiver | | | | seconds--to satellite transmissions even under |
| must be positioned where it the satellite | | | | heavy vegetation or in canyons. It is ideal for |
| transmissions will not be blocked. Sometimes a | | | | back country mapping and also has optional |
| difference of a few feet can mean the difference | | | | software to provide turn by turn directions and |
| between a clear signal to the GPS portable | | | | automatic routing.Listing for $536. it can be found |
| receiver, and a weak or blocked one. The GPS | | | | on the Internet for $350. The Garmin iQue 3600 |
| portable receivers are often incapable of receiving | | | | PDA with GPS capabability, first introduced in 2003 |
| signals if they are being used near tall buildings or | | | | with a sticker price of $589 is now advertised on |
| under heavy canopies of vegetation. The GPS | | | | the Internet for as low as $339. Finally, the |
| portable receivers can be used indoors, but only | | | | Garmin GPS Forerunner watch for runners, |
| with the aid of an external antenna. Commercial | | | | although they are far from elegant, is a |
| GPS portable devices are now available in an | | | | waterproof training devise with technology which |
| amazing variety of applications besides stand | | | | enable it to pick up satellite transmissions even |
| alone receivers. They are incorporated into PDAs, | | | | among tall buildings or under heavy vegetation. |
| wristwatches, and cell phones. And of course, | | | | These GPS watches can track distance and time |
| there are portable GPS receivers for automobiles, | | | | and run about $240. |
| motorcycles, and boats. Features And Prices Of | | | | You can also find more info on GPS Systems and |
| GPS Devices One great appeal of many portable | | | | GPS Tracker. is a comprehensive resource to |
| GPPS devices is their multi-functionality. A | | | | know about GPS System. |