Nav Aids 25

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Nav Aids 25
2012-07-06 20:15:11
Nav Aids 25

Nav Aids 25
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  1. What is an A/Cs 24 bit address?
    A unique 24 bit undividual aircraft code number, in 6 digit alphanumerical code form - eg F5137P
  2. Can an aircrafts 24 bit address be changed by the flight crew?
  3. What is ADS-B?
    A surveillance system whereby an aircrafts current position is automatically and continuously transmitted to ATC, AND other A/C, vis transmission equipment like Mode S transponders.
  4. What is a squitter?
    The broadcast of a package of Digital data out from an ADS-B equipped A/C
  5. what is the range of ADS-B transmissions from an A/C at 30,000ft?
    Approx 250nm
  6. Is ADS-B related to or reliant on ADS-C and/or CPDLC?
    No, it's totally independant
  7. Can an emergency code be sent through an ADS-B capable transponder?
    Yes, selecting an emergency code on the transponder adds a "tag" onto the ADS-B report
  8. How does ADS-B know the location of the A/C
    By referencing GNSS data
  9. Can both ADS-B DS-C be used for ATC surveillance at the same time?
  10. What is the meaning of the instruction from ATC "Re-Enter ADS-B Aircraft Identification"?
    Entering the correct Flight identification - FLT ID (the exact flight number from the filed ATC flight plan) in the FMS/FMGS
  11. What is the minimum operative equipment an aircraft must have to allow the operator to flight plan an ADS-B capability?
    One mode S transponder, and one FMS/FMGS receiving GNSS derived position information.
  12. What is ADS-C
    A surveillence system whereby an aircrafts current position is automatically transmitted to ATC, by direct or Satellite Coms, automatically in accordance with a contract setup by the ATC unit.
  13. Who sets up the reporting requirements of an ADS-C monitored flight?
    The ground system (Air Traffic Service Unit)
  14. Are the flight crew aware when an ADS-C demand report is triggered?
  15. Can the flight crew modify an ADS-C contract?
  16. When an aircraft is operating in airspace where ADS-C is the primary means of ATC surveillance, may the flight crew select the ADS-C off?
    No, not unless specifically instructed to by the monitoring ATSU
  17. What does a message "Recycle ADS" from ATC mean?
    Checks the status of ADS and ensures it's armed.
  18. must ADS-C always be used in conjunction with CPDLC?
    No not necessarily, either can be used stand alone.
  19. Does the termination of a CPDLC connection by a ground system affect ADS-C?
    no, established contracts will continue, and new contracts can be established.
  20. Can ATC set up periodic and event ADS-C contracts to be sent simultaneously?
  21. What is multilateration?
    A surveillance system whereby an aircrafts current position is determined by a central processing computer, based on the time of arrival of transponder transmissions at various remote reciever units, in response to SSR interrogations.
  22. Does multilateration require GNSS postion data?
  23. What type of transponder is required to support multilateration?
    Either mode A, C, or S
  24. What transponder setting is required for multilateration to function?
    On. ie, XPNDR/XPDR
  25. Is ADS-B compatible with multilateration?
  26. What is Multistatic Dependant Surveillance (MDS)
    Trade name of one manufacturer of multilateration systems, which utilises both Multilateration and ADS-B inputs to provide ground and en-route survellance.
  27. ADS-B has 2 significant operating limitations. what are they?
    FMS flight number must match filed ATC flight plan exactley, and A/C must have suitable transmission equipment.