![tr-v2-disco](/sites/default/files/styles/extranet_lists/public/2023-09/tr-v2-disco.png?itok=q_qUdUKZ)
A Circular letter had been issued today, 22 September 2023, to Permanent Representatives of Members of WMO regarding the forthcoming discontinuation of the Technical Regulations (WMO-No. 49), Volume II, Meteorological Service for International Air Navigation. The letter is available in all official