About: http://webisa.webdatacommons.org/41660922

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	navigation aids so that the ATC can monitor the progress of the aircraft relative to its flight plan and other aircraft.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com