EntityQ333144· pop 21· linked from 138 articlesprecision approach path indicatorSign in to savevisual aid for aircraft approaching a runway for landingConnectionsair traffic controlEntityfinal approachEntitypilot controlled lightingEntityNASAConceptInternational Standard Book NumberEntityincandescent light bulbEntitySpace ShuttleEntityConcordeEntityInternational Civil Aviation OrganizationEntityelectric lightEntityrunwayEntityLED lampEntityinstrument landing systemEntityair traffic controllerEntitygo-aroundEntityairfield traffic patternEntityCivil Aviation AuthorityEntityvisual approach slope indicatorEntityRoyal Aircraft EstablishmentEntityapproach lighting systemEntityCategoriesBritish inventionsVisual glide slope indicators