KnowraGlobal Positioning SystemLinked fromLinked fromThe 98 pages that link to Global Positioning System, each with the reason it gives.All 98Broader topic 15Related 73Narrower topic 1Compared with 9Celestial navigationCompared with: It automates positioning but depends on receiving satellite signals.TriangulationCompared with: GPS is often called triangulation, but it primarily determines position by trilateration.Inertial navigation systemCompared with: GPS can correct inertial drift, but its signals may be blocked, jammed, or spoofed.PolarisCompared with: Satellite positioning replaces the star-based navigation for which Polaris was once a useful guide.SextantCompared with: Satellite positioning replaces manual celestial fixes where signals and equipment are available.Inertial measurement unitCompared with: GPS can correct accumulated IMU position drift, but may fail indoors or under obstruction.Radio-frequency identificationCompared with: GPS estimates geographic location outdoors; RFID identifies objects within a reader's radio range.CompassCompared with: Satellite navigation can supply course information without a magnetic needle.Communications satelliteCompared with: Navigation satellites transmit signals for positioning; communications satellites relay user information.