Hanoi (VNA) – The Civil Aviation Authority of Vietnam (CAAV) hasrecently ordered the Vietnam Air Traffic Management Corporation (VATMC) anddomestic airlines to equip with Mode S transponders to improve the quality ofaircraft detection, identification and altitude reporting information.
Mode S is a Secondary Surveillance Radar process that allows selectiveinterrogation of aircraft according to the unique 24-bit address assigned toeach aircraft. It is essential in airspace subject to high levels of trafficdensity or absence of air traffic control radar coverage.
VATMC is requested to study and carry out the Mode S Enhanced Surveillance (EHS)in accordance with the progress set by the International Civil AviationOrganisation (ICAO)’s Office in Asia and Pacific, and set up plan to upgrade orinvest in infrastructure that is able to handle Mode S data.
Meanwhile, the Vietnamese airlines must outline plans and equip their aircraftwith Mode S EHS in tandem with the Asia-Pacific ICAO’s progress.
Representatives from the CAAV said that the requirement to equip Mode Stransponders was imposed at the 31st meeting of the Asia/Pacific AirNavigation Planning and Implementation Regional Group from December 14-16,2020.
Accordingly, aircraft with a maximum takeoff weight of more than 5,700kilogrammes, or with a maximum cruising true airspeed higher than 250 knotsmust be equipped with Mode S EHS./.
VNA