EntityQ4118537· pop 6· linked from 236 articlesuncontrolled airspaceSign in to saveairspace where air traffic control is not deemed necessary or cannot be provided for practical reasonsConnectionscontrolled airspaceEntityair traffic controlEntityairspaceEntityairport securityEntityInternational Standard Book NumberEntityairportEntityaviationEntitypassportEntityhotelEntityimmigrationEntityvisaEntityinternational organizationEntityairlineEntitycustoms agencyEntityInternational Air Transport AssociationEntityaircraft pilotEntityInternational Civil Aviation OrganizationEntityheight above mean sea levelEntityrunwayEntityairlinerEntityCategoriesAir traffic control