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Reduced Vertical Separation Minimum (RVSM) is a class of operations which allow aircraft between FL290 and FL410 to operate with 1000 feet of vertical separation, rather than the 2000 foot minimum separation previously required.

Reduced Vertical Separation Minimum (RVSM) is a class of operations which allow aircraft between FL290 and FL410 to operate with 1000 feet of vertical separation, rather than the 2000 foot minimum separation previously required.

RVSM operations are an ICAO standard which may be implemented by individual regulating authorities. When implemented, aircraft operating in RVSM airspace are required to have specially certified altimeters and autopilots which meet specific performance requirements for safety when operating with reduced vertical separation. For specific equipment requirements consult each regulating authority's requirements and equipment certification information.