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Voice and Data Operations in the North Atlantic
Prepared by
Loftur Jónasson & Jennie Jónasson
Iceland Radio
Seminar on the Implementation of Data Link and Satcom Communications
Bangkok, Thailand, 17-19 November 2003
Iceland Telecom
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World ViewIceland & Thailand
ICELAND
THAILAND
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The Reykjavík Control Area
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Some of our neighbouring areas
Central ADS Server
ACC Reykjavik
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The Desired End-State
The North Atlantic System Planning Group’s (NAT SPG’s) 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
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AFTN
ARINC
Network
CADS Server
Annapolis, Maryland
Geographic Filer
Internetworking
Other ACC
Met
Other ACC
Met
ART/ADCC ARINC SITA
New York ACC
Met
Santa Maria ACC
Canada Met
Gander ACC
Shanwick ACC
Reykjavík ACC
Canada Met
Met
Met
Met
Picture by ARINC of their CADS System
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Shanwick/Gander CPDLC System
CPDLC Host / FANSRouter
ARINC/ SITA
NETWORKS
(ARINC, Annapolis)
CPDLC Uplinks / AFNCPDLC
Requests /AFN
VHF
SATCOM
CPDLCMessages
X.25 NETWORKS
CAPSIN(NATS)
APN(ARINC)
HF Aeradio
CPDLCMessages
HF
MessagesTo / FromHF Voice
ScOACC,
(PRESTWICK)
CPDLCFront End
DispatchOperator
ATC / FDPS GAATS (NAV CANADA)
X.25 X.25
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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
Iceland ADS
Shanwick ADS & CPDLC
Gander ADS & CPDLC
New York ADS & CPDLC in some areas
Santa Maria ADS
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SENDING...
<NEXT
Uplink Message
CLIMB TO AND MAINTAIN FL300
Downlink Message
WILCO
CSR CLR DCT FPL MAP MSG EXE
Cockpit Display With CPDLC Information
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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
ATC Controller
Air/Ground Data Network
ATC Controller
Air /Ground Data Network
Uplink
Downlink
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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 (WPR’s) 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