What does RVSM stand for?

RVSM stands for Reduced Vertical Separation Minimum. This concept refers to the reduced vertical separation standards that allow aircraft flying at higher altitudes to operate with less vertical separation between them than was previously required. Specifically, RVSM enables aircraft operating between flight levels (FL) 290 and FL 410 to be separated by only 1,000 feet instead of the traditional 2,000 feet.

The implementation of RVSM is important for increasing airspace capacity, improving safety, and enhancing overall efficiency in air traffic management. It requires that aircraft be equipped with certain altimetry systems and undergo specific operational approvals to ensure safe navigation and separation at these altitudes. The other options do not align with the established aviation terminology or describe the RVSM concept accurately.