What is the minimum vertical separation required for aircraft flying between FL 290 and FL 410?

The minimum vertical separation required for aircraft flying between FL 290 and FL 410 is defined by the regulations governing Reduced Vertical Separation Minimum (RVSM) airspace. In RVSM airspace, aircraft altitudes are separated by 1000 feet, allowing for more efficient use of airspace and increased traffic density. However, outside of RVSM conditions, a larger vertical separation of 2000 feet is mandated to ensure safety.

The distinction reflects the enhanced accuracy of altimeter systems and technology utilized by RVSM-compliant aircraft, which allows for closer spacing. For non-RVSM aircraft, the need for greater vertical separation arises due to the potential for less precise altitude reporting and control.

These differing requirements ensure that all aircraft are safely separated based on their operational capabilities, improving overall flight safety in busy airspace.