Issue 4.00

Issued: 31 December 2021

Effective: on issue


Overseas Territories Aviation Circulars are issued to provide advice, guidance and information on standards, practices and procedures necessary to support Overseas Territory Aviation Requirements.  They are not in themselves law but may amplify a provision of the Air Navigation (Overseas Territories) Order or provide practical guidance on meeting a requirement contained in the Overseas Territories Aviation Requirements.


The Civil Aviation Act commits the UK, and hence the Territories, to implementing the Chicago Convention and its Annexes.  ICAO Annex 3 to the Convention places a responsibility on the State to ensure that arrangements are in place to meet the Standards and Recommended Practices (SARPs) of the Annex, ie to ensure Meteorological (MET) services are provided.

In accordance with the Annex 3 requirement for States to designate the authority, hereinafter referred to as the meteorological authority (MET Authority), to provide or to arrange for the provision of meteorological services the AN(OT)O gives the Governor responsibility for ensuring that appropriate arrangements for the provision and oversight of MET services within the Territory are made.  The Governor shall set out the services to be provided within the Territory and arrange for provision of such services.  This Circular sets out the procedures for defining the service to be provided and the production of a Service Definition Document in accordance with OTAR Part 174 Subpart C.


This Circular relates to OTAR Part 174.


This issue removes much of the text already included in OTAR Part 174 and focuses on the process of defining the MET services to be provided by entity (eg Meteorological Service Provider, Meteorological Regulator etc).


Enquiries regarding the content of this Circular should be addressed to Air Safety Support International at the address on the ASSI website or to the appropriate Overseas Territory Aviation Authority.