EntityQ1734789· pop 14· linked from 58 articlesvisual approach slope indicatorSign in to savelight set which provides visual descent guidance for aircraft when approaching a runway for landingConnectionspublic domainEntityelectric lightEntityrunwayEntityFederal Aviation AdministrationEntityNational Geospatial-Intelligence AgencyEntityprecision approach path indicatorEntityapproach lighting systemEntityinstrument landing system glide pathEntityfinal approachEntitydescentEntityleading lightsEntityrunway edge lightsEntityVasiEntitypilot controlled lightingEntityCategoriesBritish inventionsOptical communicationsSource attributionVisual glide slope indicators