Until recently, pilots flying in designated airspace (29,000 to 41,000 ft.) were required to allow a minimum of 2,000 ft. of vertical distance between aircraft. Now, industry advancements have reduced this required minimum distance by half. The new policy has contributed to increased air travel efficiency while creating lucrative new business opportunities for avionics companies that retrofit the necessary RVSM equipment.
The new requirements, known as Reduced Vertical Separation Minimum (RVSM), are the result of a 1988 International Civil Aviation Organization (ICAO) study which recognized the technical feasibility of the new, 1000 ft. separation standard. The North American version of the RVSM is known as the Domestic Reduced Vertical Separation Minimum (DRVSM).
January 20, 2005 was the FAA- imposed DRVSM specification deadline for aircraft flying in designated airspace. Since that time, only aircraft flying in domestic airspace that are equipped with appropriate air data systems have been allowed to fly between 29,000 and 41,000 ft. Aircraft that do not comply to the new standard have three primary alternatives to equipping themselves with the required...
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