Da Nang, Sept. 17 -- The central city of Da Nang has established four airspace zones for organisations, associations and clubs operating unmanned aircraft, said the municipal People's Committee Office on September 16. The move follows Decision No. 4167/QD-UBND recently issued by the municipal People's Committee. The zones have been defined using the WGS-84 coordinate system. All flights involving unmanned aircraft and other aerial vehicles, including test flights for the development of the low-altitude space economy, must be licensed by competent authorities. Operators must comply with the conditions specified in their flight permits and take responsibility for aviation and ground safety and security. Under the decision, the municipal Mil...