164. GPSIntroductionGlobal Positioning System (GPS): a system developed and operated by the United StatesGovernment that pinpoints your present location by utilizing latitudinal and longitudinal datareceived from at least 4 satellites (sometimes only 3 are used).The following are situations when the GPSsignal cannot be received.•When the GPS signal is obstructed whiledriving through building clusters, tunnels oron overpasses•When the signal is obstructed because ofhaving placed an object near or on the GPSantenna•When the GPS satellite is not sending anysignals to the earth (signal emission may behalted due to modifications or repairsconducted by the U.S. Tracking ControlCenter, the organization responsible forcontrolling GPS signals)•When a digitally formatted cellular telephoneunit is brought near the GPS antennaSituations when GPS signal reception is impossibleScreen with GPS signal reception inprogressHandling the GPS antenna•Consult a specialist at the store of purchase for how to install the GPS antenna.•Do not apply paint or wax onto the GPS antenna. Otherwise, signal receptionsensitivity may be diminished or signal reception may be rendered impossible.•Do not pull on the cord when uninstalling or moving the GPS antenna. Otherwise,short circuits or disconnections may result.•See P134 for information concerning GPS signal accuracy and errors. See P152for definitions of the terminology employed.ATTENTION
