Document Number:    
                  WG-EMM-2019/55
              
      Submitted By:    
                  Dr Svetlana Kasatkina (Russian Federation)
              
      Approved By:    
                  Dr Svetlana Kasatkina (Russian Federation)
              
      Accessibility Categories    
                  Request permission to release each time (RP)
              
      Abstract    
                  Methodical aspects of a large-scale international survey in 2019 are discussed in the context of stated objectives. The main sources of uncertainty in the results of the 2019 survey are shown.