3rd AVIATION CONFERENCE - "AIR TRANSPORT OF TODAY AND TOMORROW"

1. FANS
FUTURE AIR NAVIGATION SYSTEM
HELLENIC AVIATION SOCIETY
MAY 2014
ΣΠΥΡΟΣ ΓΙΑΝΚΟΒΙΤΣ Αεροναυπηγός μηχανικός - Κυβερνήτης A340
ΓΙΑΝΝΗΣ ΣΤΑΥΛΑΣ Αεροναυπηγός μηχανικός - Ελεγκτής Εναέριας
Κυκλοφορίας
“ 3ο Αεροπορικό Συνέδριο: Οι
Αερομεταφορές του Σήμερα και του
Αύριο”
Ελληνική Αεροπορική Ένωση
12-13 Μαΐου 2104
Διεθνής Aερολιμένας Αθηνών
“Ελ.Βενιζέλος”

2. WHAT IS FANS ?
 1. Satellite Technology to manage ATC
 2. Space based technology less dependent on
ground infrastructure
 3. Data link communications based on satellite
and GPS networks

3. CURRENT AIR TRAFFIC MANAGEMENT
 ATC currently is based on ground
navigational aids, radar surveillance, and
voice communications between Controllers
and Flight Crews

4. OPERATOR ADVANTAGES WITH FANS
 1. Reduced separation between airplanes
 2. More efficient route changes
 3. Satellite communication
 4. No altitude changes at track crosses
 5. More direct routings

5. STATUS OF FANS 1 (1ST STAGE OF
IMPLEMENTATION)
 Airplanes must be equipped with following:
 1. Airline operational control datalink (AOC)
 2. Automatic Dependent Surveillance (ADS)
 3. ATC data link
 4. GPS integration
 5. Required Navigational Performance (RNP)
 6. Required time of Arrival (RTA)

6. AIRLINE OPERATIONAL CONTROL DATA LINK
 AOC gives the a/c the ability to transmit new
routes, position reports and updated winds
through the data link network

7. AUTOMATIC DEPENDENT SURVEILLANCE (ADS)
 The ADS function reports the current flight
position via satellite or VHF data link to the
air traffic controller or to the airline.
 This improves surveillance of airplanes en
route.
 Refer to Malaysian MH 370

8. ADS B

9. GLOBAL POSITIONING SYSTEM
 This improvement
provides a more
accurate position for
en route and
approach operations
 The navigation
system must
demonstrate that it
can meet the required
navigational

10. ΕΜΦΑΝΙΣΗ ΤΩΝ ΠΛΗΡΟΦΟΡΙΩΝ ΣΤΟ CDTI
CDTI – Cockpit Display of Traffic Information
ACARS : Aircraft communications addressing &
reporting system

11. ACARS
Aircraft Communication Addressing & Reporting System: AOC messages include
take-off and landing confirmation, weather information, gate information, and engine
reports. ATC messages include navigation information, aircraft positional reporting,
departure clearances, oceanic clearances, runway conditions, and weather data.
Currently AOC messages take up 80% of ACARS network traffic versus 20% for
ATC, but the FAA NextGen program will shift more and more voice communications
to data in the near future

12. FAN INTERFACE

13. TYPICAL FANS ARCHITECTURE

14. REQUIRED NAVIGATIONAL PERFORMANCE (RNP)
 RNP criteria require accuracy, integrity and
availability as set by FANS
 Actual RNP is constantly monitored
 If the required navigational performance is
exceeded the flight crew is alerted to
compensate for the situation

15. REQUIRED TIME OF ARRIVAL (RTA)
 This gives flight crew the ability to assign a
time constraint to a waypoint (or even to
destination) allowing the a/c to cross the
waypoint at a specific time, plus or minus 30
sec. That helps managing crossing traffic.
 If RTA is not available crew should be alerted

16. FANS BENEFITS
 Because use of FANS permits more ATC
space to be used through more accurate a/c
surveillance, operators have the following
benefits:
 Reduced fuel consumption, increased
payload and cargo, more efficient route
changes, more direct routes, no altitude
changes at crossings and real time updated
weather conditions

17. WHAT ABOUT VOICE COMMUNICATIONS
 With FANS technology ADS-C has really
substituted the Transponder mode S.
 With the high accuracy surveillance it has
also made radar environment redundant
 But the controller still needs to give
clearances and vectoring as well as altitude
changes to flight crews

18. CPDLC
 CPDLC stands for “ Controller Pilot Data Link
Communication”
 It is a series of text messages exchanged between
ATC and flight crew in a form similar to mobile SMS
texts
 They use standard operational phraseology

19. CPDLC
 The pilots use the MCDU screen to receive
and respond on ATC text messages
 The procedure is not affected by language
and pronunciation differences, or by blocked
VHF transmissions
 All clearances are given in short clear text
messages and are responded similarly

20. CPDLC
 The whole procedure is especially useful in
oceanic environment where, in the past,
noisy and inefficient HF communications
where used, due to the long distances
involved
 CPDLC is already used in Oceanic crossings
where distances of the a/c from the VHF
ground transmitters is in excess of 400 NM

21. CPDLC

22. SO WHAT IS REALLY FANS
 FANS is made of two major renovations:
 ADS-B (Automatic Dependent Surveillance-
Broadcast)
 CPDLC (Controller Pilot Data Link
Communication)
 Note that ADS-B has been modified to ADS-
C (Automatic Dependent Surveillance-
Contract)

23. SO WHAT IS REALLY FANS
 ADS-C will eventually substitute completely
Transponders and Radars.
 CPDLC will eventually substitute HF and
VHF air to ground communications
 The traditional voice communication and a/c
surveillance by radar may be kept only as
back up systems

24. WHAT ABOUT EMERGENCIES
 Mayday and PAN PAN functions will remain
with voice communication
 Flight recorders will be modified to recognize
and store all satellite data link exchanged
between ground stations and a/c

25. A380 FANS

26. ΕΚ ΜΕΡΟΥΣ ΤΗΣ ΕΛΛΗΝΙΚΗΣ
ΑΕΡΟΠΟΡΙΚΗΣ ΕΝΩΣΗΣ ΣΑΣ
ΕΥΧΑΡΙΣΤΩ ΓΙΑ ΤΗΝ ΠΡΟΣΟΧΗ ΣΑΣ