Voice and Data Operations in the North Atlantic

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Voice and Data Operations in the North Atlantic
Seminar on the Implementation of Data Link and
Satcom Communications Bangkok, Thailand, 17-19
November 2003

• Prepared by
• Loftur Jónasson Jennie Jónasson
• Iceland Radio

Iceland Telecom
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World ViewIceland Thailand
3
The Reykjavík Control Area
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Some of our neighbouring areas
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The Desired End-State

• The North Atlantic System Planning Groups (NAT
  SPGs) policy maintains that Standards and
  Recommended Practices (SARPs) compliant
  Aeronautical Telecommunication Network (ATN) data
  link technologies remain the desired end-state
  but greater flexbility has been agreed to for the
  use of other non-SARPs compliant technologies, in
  particular FANS-1/A.

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FANS FIRS

7
Gander ACC
Canada Met
Canada Met
Met
Met
Met
Met
Met
Met
Picture by ARINC of their CADS System
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Shanwick/Gander CPDLC System
X.25
X.25
Messages
To / From
HF Voice
CPDLC
Dispatch
Front End
Operator
ScOACC,
ATC / FDPS
GAATS (NAV CANADA)
(PRESTWICK)
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Automatic Dependent Surveillance (ADS)

• Prior to the implementation of ADS all flights,
  FANS equipped or not, had to make position
  reports at approximately every 10 degrees
• This took up a great deal of frequency time

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FANS North Atlantic Stations
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Cockpit Display With CPDLC Information
Uplink Message

CLIMB TO AND MAINTAIN FL300
Downlink Message
WILCO
ltNEXT
SENDING...
DCT
MAP
CSR
CLR
FPL
MSG
EXE
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CPDLC Phase 1, 2 3

• Phase 1
• Flight crews use data link to request speed and
  level changes and receive a response via voice
• Phase 2
• Flights receive VHF domestic frequency
  assignments via CPDLC
• Phase 3
• Flights receive clearances and response to
  clearance requests via CPDLC

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Uplink Downlink
Downlink
Air/Ground Data Network
Air /Ground Data Network
Uplink
ATC Controller
ATC Controller
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HFDL(HF Data Link)

• The HFDL issue is becoming more prominent as
  airlines are showing more and more interest in
  Polar flights and HFDL is the sole data link
  media that can provide continuous coverage over
  the Arctic region, therefore FANS operations
  there will have to rely on this media.

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FMC WPR

• FMC Waypoint Position Reports (WPRs) are
  currently being looked at in the North Atlantic.
• Alternative for non-FANS equipped aircraft.

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Human Factors Transition Issues

• Transition to data link is not initially a
  time-saver
• Once pilots and operators get used to the system
  and procedures it does become a time-saver

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Oceanic Clearances and Data Link

• Canada and The United Kingdom have indicated that
  they plan to implement voiceless Oceanic
  Clearance Deliveries by the end of 2004

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ATN in the North Atlantic

• Consideration of using ATN equipped B-737-300
  aircraft in CPDLC trials