What is the vertical separation minimum up to FL410 for non-RVSM aircraft?

For non-RVSM (Reduced Vertical Separation Minimum) aircraft flying up to Flight Level 410 (FL410), the established vertical separation minimum is 1,000 feet. This standard is maintained to provide adequate spacing between aircraft operating in the same flight levels to ensure safety and prevent collision.

In non-RVSM airspace, aircraft are unable to utilize the reduced vertical separation norms that RVSM-equipped aircraft can. Therefore, the vertical separation is set higher than in RVSM airspace, but for operations below the RVSM thresholds up to FL410, 1,000 feet remains the standard clearance that controllers use to safely manage air traffic. This ensures proper separation and reduces the risk of encounters between aircraft flying at similar altitudes.