The Civil Aviation Authority of Nepal (CAAN), the aviation regulatory body of Nepal has established Restricted Area over Presidential Residence area (Sital Niwas), Rashtrapati Bhavan on August 16, 2018.
According to the Source, the restricted area will be effective from October 11, this year. The CAA Nepal has established the restricted area on the following coordinates (27″44′, 11.21″N 085″ 19’21.03″E), (27″ 43′, 53. 35″ N 085″. 19′ 18.21″ E), (27″ 43′, 46.16″ N 095″ 19′ 39.84″ E) and (27″ 44′,01.37″ N 095″. 19′, 52.94″ E) Between R336 – R346 and Between 3.5 – 4.1 DME with the reference to KTM VOR/DME within certain criteria for operation of Aircraft. The Fixed Winged Aircraft operators are authorized to fly over these areas above 1000 Ft from Ground while the rotor wing operator has not been authorized to fly on these areas.
Previously, the CAA Nepal taking security as the major concern had issued a NOTAM A234/16 following by the Suspended of Sitapaila Helilane (S04/2017) from 6th Feb 2017 for the rotor wing operator.
Currently, there are eight Helilane existing at Kathmandu named with BAGMATI (Bravo & Kilo), BHAKTAPUR, CHANGU, GOKARNA, MAIJU, SITAPAILA, THANKOT and TOKHA (Bravo & Kilo). The rotor wing aircraft following any helilane must maintain 4800 Ft altitude.
Restricted airspace is an area (volume) of airspace typically used by the military in which the local controlling authorities have determined that air traffic must be restricted (if not continually prohibited) for safety or security concerns. It is one of many types of special use airspace designations and is depicted on aeronautical charts with the letter “R” followed by a serial number.