04 Jun 2023

Aircraft Pre-Purchase Inspection

RVSM stands for Reduced Vertical Separation Minimum, which is a set of regulations implemented by the International Civil Aviation Organization (ICAO) to increase the capacity and efficiency of airspace by reducing the vertical separation between aircraft. The standard vertical separation in RVSM airspace is reduced from 2,000 feet to 1,000 feet between flight levels 290 and 410.

An RVSM Height Monitor, also known as an RVSM Monitoring System, is a specialized equipment used to ensure compliance with the RVSM regulations. It is designed to monitor and verify the accuracy of an aircraft's altimetry system, specifically its ability to maintain the correct altitude within the reduced separation airspace.

The RVSM Height Monitor typically consists of a set of ground-based monitoring stations strategically located throughout RVSM airspace. These monitoring stations use radar and/or GPS technology to measure the altitude of passing aircraft. The altitude information is then compared with the altitude reported by the aircraft's altimetry system. If the reported altitude deviates from the measured altitude by a certain threshold, an alert is triggered, indicating a potential altimetry error.

The purpose of the RVSM Height Monitor is to detect any altimetry errors that could compromise the required vertical separation between aircraft. By identifying and addressing such errors promptly, the monitoring system helps ensure the safety and integrity of RVSM operations.

Airlines and operators that operate within RVSM airspace are required to have their aircraft equipped with altimetry systems that meet specific accuracy standards. These systems need to be regularly calibrated and maintained to ensure their accuracy. Compliance with RVSM requirements is typically monitored by aviation authorities, and aircraft may be subject to periodic inspections and audits to verify their altimetry system's accuracy and the effectiveness of the RVSM Height Monitoring equipment.