In April 2012, HNMS was designated by the Minister of Infrastructure, Transportation and Networks as the exclusive Provider for Meteorological Services to International Aviation for the entire Hellenic F.I.R. under the framework of the Single European Sky Legislation.
In July 2020 HNMS was recertified by HANSA (Hellenic Air Navigation Supervisory Authority) for the provision of Meteorological Services to International Aviation for the entire Hellenic F.I.R. according to Commission Implementing Regulation (EU) 2017/373 on Common and Specific Requirements of the European Parliament.
Additionally In July 2019, Hellenic National Meteorological Service (HNMS) renewed its Certification as per EN ISO 9001:2015 for the Quality Management System (QMS) which develops and applies for the provision of meteorological support to aviation. This certification was conducted by an authorized Audit Organization and is valid until July 2022.