What altitude separation is maintained between aircraft not equipped for RVSM above FL290?

Maintaining altitude separation for aircraft not equipped for Reduced Vertical Separation Minimum (RVSM) at altitudes above Flight Level 290 is critical for ensuring safety in controlled airspace. When aircraft are not RVSM compliant, a greater vertical separation is required to mitigate the risks associated with potential altitude deviations, which could lead to a loss of separation between aircraft.

The correct altitude separation in this case is 2000 feet. This standard is established to provide an additional buffer between aircraft that are not capable of maintaining the more precise altitudes required for RVSM. While RVSM allows for just 1000 feet of separation between aircraft at altitudes above FL290, those unable to utilize this system must maintain 2000 feet due to the increased likelihood of altitude discrepancies that can occur with less sophisticated altitude-keeping systems.

This requirement helps to enhance safety and operational efficiency in high-density airspace, ensuring that all aircraft are adequately spaced to avoid collisions, especially in varying atmospheric conditions that may affect their altitude accuracy.