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Reduced vertical separation minima
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<p> Reduced vertical separation minimum (RVSM) is the reduction, from 2,000 feet to 1,000 feet, of the standard <a href="/facts/Vertical_separation_(aviation)/5kHa4Wh5">vertical separation</a> required between aircraft flying between <a href="/facts/Flight_level/m9yfLlD2">flight level</a> 290 (29,000 <a href="/facts/Foot_(unit)/XKamEGjV">ft</a>) and flight level 410 (41,000 ft). This reduction in vertical separation minimum therefore increases the number of aircraft that can fly in a particular volume of <a href="/facts/Controlled_airspace/M1unVM3U">controlled airspace</a>. </p>