# Commission Implementing Regulation (EU) 2017/373 of 1 March 2017 laying down common requirements for providers of air traffic management/air navigation services and other air traffic management network functions and their oversight, repealing Regulation (EC) No 482/2008, Implementing Regulations (EU) No 1034/2011, (EU) No 1035/2011 and (EU) 2016/1377 and amending Regulation (EU) No 677/2011 (Text with EEA relevance), Division: ATM/ANS.OR.A.090 Common reference systems for air navigation


For the purpose of air navigation, service providers shall use:
(a)the World Geodetic System – 1984 (WGS-84) as the horizontal reference system;
(b)the mean sea level (MSL) datum as the vertical reference system;
(c)the Gregorian calendar and coordinated universal time (UTC) as the temporal reference systems.

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Source: https://www.legislation.gov.uk/eur/2017/373/annex/III/division/1/division/19 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-373/annex-III/division-1/division-19
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.