What is the maximum altitude deviation allowed in RVSM operations?

In Reduced Vertical Separation Minimum (RVSM) operations, the standard allows for a maximum altitude deviation of 200 feet. This is essential for maintaining the safety and efficiency of the airspace system, as RVSM allows aircraft to operate in a reduced vertical separation environment, where the vertical spacing between aircraft is decreased from 2,000 feet to 1,000 feet at altitudes between 29,000 feet and 41,000 feet.

The RVSM regulation mandates strict adherence to altitude assignments for aircraft equipped with the necessary altimetry systems, and any deviation beyond the established limit could compromise the safety of operations. A maximum deviation of 200 feet ensures that even in cases of equipment malfunction or operational error, the risk of vertical collision remains acceptably low, reinforcing the safety framework within which RVSM operates. Thus, the understanding of this limit is critical for pilots and operators engaged in RVSM airspace to maintain compliance and safety.

The other altitude deviations mentioned are either more than what is permissible or do not align with the RVSM guidelines, which emphasize a maximum threshold that keeps operations within a safe range.