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ACAS HVR Encounters and Operator-Specified Procedures

 
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K.Haroon
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PostPosted: Tue Nov 13, 2012 3:57 pm    Post subject: ACAS HVR Encounters and Operator-Specified Procedures Reply with quote

Arrow ACAS Performance during HVR (High Vertical Rate) Encounters and Operator-Specified Procedures

Effective 22 November 2008, the following provision is applicable in ICAO PANS-OPS Doc. 8168 (within or outside RVSM airspace): Pilots should use appropriate procedures by which an airplane climbing or descending to an assigned altitude or flight level, especially with an autopilot engaged, may do so at a rate less than 8 m/s (or 1500 ft/min) throughout the last 300 m (or 1000 ft) of climb or descent to the assigned altitude or flight level when the pilot is made aware of another aircraft at or approaching an adjacent altitude or flight level, unless otherwise instructed by ATC. These procedures are intended to avoid unnecessary airborne collision avoidance system (ACAS II) resolution advisories in aircraft at or approaching adjacent altitudes or flight levels. For commercial operations, these procedures should be specified by the operator. Some European States have published regulations in their Aeronautical Information Publications (AIPs) specifying vertical rates, so it is important to refer to relevant AIPs for specific information
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