ICAO Doc 8896:2019

This manual aims at meeting the needs of aeronautical meteorologists, particularly those at the working level, as well as the needs of pilots and other aeronautical personnel for guidance on practices to be used in the provision of meteorological service to air navigation. The body of the manual is based primarily on the content of Annex 3 — Meteorological Service for International Air Navigation and it contains detailed guidance on meteorological reports and forecasts. The appendices address specific issues such as location of instruments at aerodromes, and guidelines for authorized access to WAFS forecasts and OPMET information through the AFS satellite broadcast and Internet-based services. This twelfth edition introduces space weather centres and the requirement to disseminate OPMET information using ICAO meteorological information exchange model (IWXXM)7 geography markup language (GML) form, introduced in Amendment 78 to Annex 3.