Log inLog in    RegisterRegister          SearchSearch       ProfileProfile    ContactContact       FAQFAQ     Log in to check your private messagesLog in to check your private messages

Global Operational Data Link Document (ICAO)

 
Post new topic   Reply to topic    www.TheAirlinePilots.com Forum Index -> Communication, Navigation & Surveillance
View previous topic :: View next topic  
Author Message
K.Haroon
Site Admin


Joined: 11 Dec 2005
Posts: 1296

PostPosted: Thu May 01, 2014 11:26 pm    Post subject: Global Operational Data Link Document (ICAO) Reply with quote

Arrow Global Operational Data Link Document (ICAO) - 2010

This guidance material is intended to maximize operational benefits in data link operations by promoting seamless and inter-operable data link operations throughout the world. This edition limits itself to those data link operations that apply to the use of FANS 1/A and its applications: automatic dependent surveillance — contract (ADS-C), controller-pilot data link communications (CPDLC) and the flight management computer waypoint position reporting (FMC WPR). It also addresses the performance of the data link applications taking into consideration the transmission media used by those applications. Future editions are expected to incorporate guidance that applies to the planned expansion of ATN CPDLC in core Europe as well as the use of FANS 1/A in continental Europe.

Arrow Global Operational Data Link Document (ICAO) - 2013


Last edited by K.Haroon on Mon Sep 01, 2014 12:39 pm; edited 2 times in total
Back to top
View user's profile Send private message
chucho



Joined: 30 Aug 2014
Posts: 2

PostPosted: Sun Aug 31, 2014 9:46 pm    Post subject: Re: Global Operational Data Link Document (ICAO) Reply with quote

K.Haroon wrote:
Arrow Global Operational Data Link Document (ICAO)

This guidance material is intended to maximize operational benefits in data link operations by promoting seamless and inter-operable data link operations throughout the world. This edition limits itself to those data link operations that apply to the use of FANS 1/A and its applications: automatic dependent surveillance — contract (ADS-C), controller-pilot data link communications (CPDLC) and the flight management computer waypoint position reporting (FMC WPR). It also addresses the performance of the data link applications taking into consideration the transmission media used by those applications. Future editions are expected to incorporate guidance that applies to the planned expansion of ATN CPDLC in core Europe as well as the use of FANS 1/A in continental Europe.


Hi Haroon
First post on your web.
Itīs a question about revise estimates. According to GOLD if you are ADS-C you do not need to revise the estimates if there is an error greater than 3 minutes. Thatīs generaly speaking ,but on appendix E,table E-NAT-1 says that for NY they donīt want any (CPDLC) revise estimate except on voice.In Gander and Shanwick and Santa María they do want one.
But right after that table,on parragraph E.7.1.4.1 says: In the NAT Region, if the estimated time for the next position last provided to air traffic control is found to be in error by three minutes or more, the flight crew should provide a revised estimated time.
So,what is it,yes or no?
Itīs a bit of confusing
Thanks
Chucho
Back to top
View user's profile Send private message
K.Haroon
Site Admin


Joined: 11 Dec 2005
Posts: 1296

PostPosted: Sun Aug 31, 2014 11:20 pm    Post subject: Reply with quote

Hi, thanks for the post, welcome.

I assume you are referring to Table E-1 Data link services by FIR (as I cannot find the ref E-NAT-1)

According to this table Remarks for Gander, Santa Maria and Shanwick are:

Quote:
Report revised ETA: Next waypoint ETA error 3 minutes or more, use free text DM 67k REVISED ETA [position] [time]. See paragraph E.2.6.


Paragraph E.2.6. is about reporting requirements in NAT airspace where ADS-C is available (I assume you were referring to this as I cannot find the ref E.7.1.4.1).

The first part of it says:

Quote:
In the NAT Region, if the estimated time for the next position last provided to air traffic control is found to be in error by three minutes or more, the flight crew should provide a revised estimated time.


That means a revised estimated time is necessary.

The second part says:

Quote:
The flight crew may assume that the estimate for the next waypoint, shown on the FMS at the time a waypoint is crossed, is the estimate transmitted to ATC.


So with ADS-C, the complete position report (including the estimate) will automatically be transmitted to ATC on either crossing the waypoint or according to the type of contract established between ATC and A/C.

Since some event is needed for ADS-C to transmit the revised ETA, there can be a possibility of an ETA error of 3 minutes or more which is not immediately passed on to the ATC.

So the third part (of para E.2.6) says:

Quote:
The flight crew should provide the revised estimate to the controlling ATS unit as soon as possible via voice or CPDLC using free text DM 67k REVISED ETA [position] [time]


Therefore in my understanding, if you are passing a waypoint with ADS-C working then position report with revised ETA will be automatically sent. However if you observe an error and you still have some time to reach the waypoint, you should send the revised ETA through CPDLC or voice.

Regarding New York Table E-1 says:

Quote:
DO NOT use CPDLC for position reporting. Use ADS-C or voice only.


So you you wont use CPDLC (free text or pre-formatted messgaes) for position reporting here, rest is same as above.

This is just my understanding, please confirm with others also.

Regards
Back to top
View user's profile Send private message
chucho



Joined: 30 Aug 2014
Posts: 2

PostPosted: Mon Sep 01, 2014 12:08 pm    Post subject: Reply with quote

Thanks for your quick answer.
You couldīt find the references because you were looking into the 2010 GOLD version.The latest one is from 2013.
Anyway there is no difference.
I guess that what prevails is the table with the particular regulations for the different areas.Itīs just a bit confusing that just after that table they put the general rule again asking for the revise estimate.
Best regards
Back to top
View user's profile Send private message
K.Haroon
Site Admin


Joined: 11 Dec 2005
Posts: 1296

PostPosted: Mon Sep 01, 2014 12:41 pm    Post subject: Reply with quote

Thanks for the update:

Arrow Global Operational Data Link Document (ICAO) - 2013

Regards
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    www.TheAirlinePilots.com Forum Index -> Communication, Navigation & Surveillance All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Powered by phpBB