KnowraSignals intelligenceLinked fromLinked fromThe 19 pages that link to Signals intelligence, each with the reason it gives.All 19Broader topic 2Related 9Narrower topic 5Compared with 3SurveillanceRelated: It monitors communications rather than relying on direct visual observation.Electronic warfareRelated: Electronic-support collection can contribute to intelligence about adversary systems and activity.Aerial reconnaissanceRelated: Airborne platforms can collect radio emissions as well as images of physical targets.Drone warfareRelated: Some military drones carry equipment for collecting electronic emissions.Information warfareRelated: Intercepted signals can reveal an adversary’s plans while exposing vulnerabilities in its communications.Gulf of Tonkin incidentRelated: Intercepted communications were cited as evidence of a North Vietnamese attack on August 4.J. E. B. StuartRelated: Union signal stations sometimes exposed Confederate movements that Stuart’s cavalry sought to conceal.Reconnaissance aircraftRelated: Specialized aircraft collect transmissions that imagery sensors cannot reveal.Hideo IwakuroRelated: It was one source of evidence used to estimate foreign military capabilities.