Reduced Vertical Separation Minimum (RVSM)

This final rule amends the list of airspace locations where Reduced Vertical Separation Minimum (RVSM) may be applied to include the New York Flight Information Region (FIR) portion of West Atlantic Route System (WATRS) airspace. RVSM is the reduction of vertical separation between aircraft at certain higher altitudes. RVSM is applied only between aircraft that meet stringent altimeter and auto- pilot performance requirements. The introduction of RVSM in WATRS airspace will save operators fuel and time and will enhance airspace capacity. This rule also requires any aircraft that is equipped with Traffic Alert and Collision Avoidance System version II (TCAS II) and that is flying in RVSM airspace to incorporate a version of TCAS II that is compatible with RVSM operations.