PERSONAL SECURITY SYSTEM

摘要

A fully automatic personal security system which combines the advantages of worldwide LORAN-C or GPS navigation with the substantially worldwide communication capabilities of a cellular telephone or communication satellite. The security system comprises a mobile unit (30) which communicates emergency data including position coordinates, to a central dispatch station (40) which receives the emergency data and accurately displays all necessary emergency information superposed on a digitized map at a position corresponding to the location of the mobile unit (30).