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┃                                ┃                        ┣━━━━━┳━━━━━┫
┃I  ~-~ A318                     ┃I          NAVIGATITCAS ┃SEQ 100 1 ┃I REV 31  ┃
┃ aw aw ,, ~% A319               ┃                        ┃          ┃          ┃
┃ Lli,~ A320                     ┃                        ┃          ┃          ┃
┃      A~7-~'M" A321             ┃                        ┃          ┃          ┃
┃   FLIGHT CREW OPERATING MANUAL ┃                        ┃          ┃          ┃
┗━━━━━━━━━━━━━━━━┻━━━━━━━━━━━━┻━━━━━┻━━━━━┛
PRINCIPLE
The TCAS interrogates transponder of intruders. From the transponder replies, the TCAS
determines for each intruder :
- its relative bearing
- its range and closure rate
- its relative altitude if available (ATC mode C or S)
Then the TCAS computes the intruder trajectory, the Closest Point of Approach (CPA) and
the estimated time (TAU) before reaching the CPA.
Each time the relative position of the intruder presents a collision threat, aural and visual
advisories are triggered.
TCAS optimizes vertical orders to ensure a sufficient trajectory separation and a minimal
vertical speed variation considering all intruders.
INTRUDER CLASSIFICATION
The intruders are classified in four levels
┏━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┓
┃LEVEL                     ┃INTRUDER POSITION                 ┃DISPLAYED INFORMATION     ┃
┣━━━━━━━━━━━━━╋━━━━━━━━━━━━━━━━━╋━━━━━━━━━━━━━┫
┃Proximate                 ┃- no collision threat             ┃- ND' intruder position   ┃
┃                          ┃- intruder in the vicinity of the ┃                          ┃
┃                          ┃  a/c (closer than 6 NM           ┃                          ┃
┃                          ┃  laterally and                   ┃                          ┃
┃                          ┃  + 1200 ft vertically)           ┃                          ┃
　
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本文鏈接地址：AIRBUS A320 Flight Crew Operating Manual4(112)