NAARMO - North American Approvals Registry and Monitoring Organization

Monitoring Methods
- GMU
- AGHME

U.S. RVSM Approvals

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AGHME Monitoring Status - Click here to check for successful AGHME monitorings

AGHME - Aircraft Geometric Height Keeping Element

The NAARMO has developed the AGHME system to monitor all aircraft passing through its coverage volume, with the primary aim of supporting estimation of height-keeping performance parameters for the bulk of operations in North American RVSM airspace. The AGHME system does not require that any special monitoring devices be installed on an aircraft in order that it be monitored. It is necessary, however, that the aircraft have an operational Mode S transponder. Future AGHME software development will relax this requirement to that of an operational Air Traffic Control Radar Beacon System transponder.

All AGHME systems are functionally identical. Hence, an operator wishing to use an AGHME constellation to satisfy monitoring requirements should follow the guidance provided under the “AGHME Monitoring Procedures” link. This will suffice at any AGHME constellation location.	AGHME Monitoring Procedures
AGHME constellations will be located at seven sites in the United States and Canada. The “AGHME Locations” link provides information about these locations, and associated availability dates.	AGHME Locations
The complete source for all operator/aircraft RVSM information is available at the “RVSM Documentation” link.	RVSM Documentation