Aviation | News | 2021-01-05 | WMO publishes update to WMO-No. 386, Manual on the Global Telecommunication System

WMO has recently published a 2020 update to the Manual on the Global Telecommunication System: Annex III to the WMO Technical Regulations (WMO-No. 386).

The 2020 update is available via the WMO e-Library here in English, French, Spanish and Russian.

This update, approved by the President of WMO via WMO's fast-track procedure for amendments, addresses Tables B1, B7 and C6. Notably, Tables B1 and B7 address the data designators in abbreviated headings to be used for space weather advisories issued in abbreviated plain language and IWXXM. 

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