Before revision: 6) (Dead link 2016) RTCA/DO-181C, June 12, 2001: "Minimum Operational Performance Standards for Air Traffic Control Radar Beacon System/Mode Select (ATCRBS/MODE S) Airborne Equipment" External links "Avionics" a 1971 Flight article on the RRE system of 1963.
After revision: Further reading (59 pages) (5 pages) (9 pages)6) (Dead link 2016) RTCA/DO-181C, June 12, 2001: "Minimum Operational Performance Standards for Air Traffic Control Radar Beacon System/Mode Select (ATCRBS/MODE S) Airborne Equipment" External links "Avionics" a 1971 Flight article on the RRE system of 1963.