Monitoring Agency for Asia Region (MAAR) was established by Aeronautical Radio of Thailand, Ltd. (AEROTHAI) under the approval of the Asia/Pacific Air Navigation Planning and Implementation Regional Group (APANPIRG) to assume the duties and responsibilities of the Regional Monitoring Agency (RMA) for the Asia Region.

The principal role of the MAAR is to assist the International Civil Aviation Organization (ICAO) in the continuation of the safety assessment program for the implementation of Reduced Vertical Separation Minimum (RVSM) and other monitoring requirements as determined by the APANPIRG.

• The new all-in-one RVSM guidance material for APAC States - Guidance Material for the Continued Safety Monitoring of the Asia-Pacific RVSM Airspace is available here (October 2023) on ICAO APAC website.
• Since October 2019, we have been using the Online LHD Reporting System. The link to the system is available here. With the new system, users can view, edit and delete previously submitted LHDs. For States who still wish to submit the form via email, please use the Word document form here.
• RASMAG Safety Bulletin highlighting safety issues in the Asia Pacific RVSM airspace. Click here (July 2019) for first issue and click here for second issue (June 2021) on ICAO APAC website.
• The new RVSM Minimum Monitoring Requirements (MMR) table is available here. (14 June 2024)
• Implementation of the “RMA bulletin” and its impact on RVSM operations in the European airspace. Click here for more information.
• Learn more about Large Height Deviation (LHD)
• The risk estimates are now updated for the new assessment period from January 2022 to December 2022