What is the minimum required vertical separation for non-RVSM aircraft at or above FL290?

For non-RVSM (Reduced Vertical Separation Minimum) aircraft operating at or above Flight Level 290 (FL290), the minimum required vertical separation is 2,000 feet. This higher level of vertical separation is mandated to ensure safety among aircraft that may not have the altitude-keeping accuracy or vertical guidance technology found in RVSM-certified aircraft. RVSM allows for a reduced vertical separation of 1,000 feet for aircraft equipped to comply with specific performance standards; however, non-RVSM aircraft do not meet those standards and therefore must maintain greater separation to minimize collision risk and ensure safe operational practices at those altitudes.