Data Link

Bookmark and Share

Data Link News

FAA Announces Phase 2 of the NAT Data Link Mandate
Nov. 25, 2013
The FAA on Dec. 12 will publish a notice to airmen detailing plans for the rollout of Phase 2 of the North Atlantic Systems Planning Group's (NAT SPG) North Atlantic Data Link Mandate (NAT DLM). The implementation begins with Phase 2a, on Feb. 5, 2015, when flights within the NAT Organized Track System between FL350 and FL390 (inclusive) will be required to be equipped with FANS 1/A (or equivalent) controller-pilot data link communications (CPDLC) and ADS-C systems. Phase 2b begins on Dec. 7, 2017 and expands the affected airspace to the ICAO NAT Region. When Phase 2c takes effect on Jan. 30, 2020, all flights at FL290 and above will need the required equipment throughout the ICAO NAT Region. For more information, contact NBAA's Operations Service Group at [email protected] or review the FAA's announcement.
Implementation of Data Link Communication Set for North Atlantic
August 20, 2012
Beginning in February 2013, Phase 1 of data link technology efforts will go into effect for portions of the airspace over the North Atlantic (NAT). Throughout the month of August 2012 the FAA will be publishing several notices that address operations in this area. In order to enhance safety, efficiency, and capacity in this region, FANS 1/A, CPDLC, and ADS-C will be implemented on two designated tracks over the Atlantic between Flight Levels 360 and 390 inclusively. It will be mandatory for aircraft to be properly equipped to operate at those altitudes.

Overview

There are many activities afoot in the US and elsewhere to bring about the relatively near-term implementation of various data link technologies – both in the cockpit and on the ground.  In today’s landscape, communication between pilots and controllers on the oceanic airways of the North Atlantic (NAT) is accomplished oftentimes through a combination of long-range VHF radios, HF radios, and for those equipped and approved, Controller Pilot Data Link Communications (CPDLC) technology – the in-cockpit text messaging ability.

Tomorrow’s world, as aligned with NextGen transformations, will see these data link technologies implemented in an effort to alleviate the audio congestion on radio frequencies thereby increasing airspace capacity, direct routing and allowing for faster clearances with auto-acceptance.

Data Link Components

The three primary components to data link communications are Future Avionics Navigation Systems (FANS) 1/A, CPDLC, and Automatic Dependent Surveillance - Contract (ADS-C).  ADS-C is similar to ADS-B, but is used primarily for making position reports.  With the same data link system operators should be able to request and receive their oceanic clearance.  ADS-C is separate from CPDLC – you can use ADS-C without CPDLC, but not CPDLC without ADS-C.  These two systems combined provide the basis for FANS compatibility.

Data Link Implementation

The FAA has published several notices that address data link enhancements and operations in the NAT.  In the NAT FANS 1/A, CPDLC and ADS-C will begin Phase 1 on February 7, 2013 on two designated tracks over the Atlantic between Flight Levels 360 and 390 inclusively.  Phase 2 will cover a broader area of the MNPS (Minimum Navigation Performance Airspace) beginning February 2015 with further details on vertical and lateral dimensions to come.

All of these activities will allow for greater safety, efficiency and capacity both in airspace, spectrum and manpower.  For the present they are non-exclusionary to allow for a reasonable period to phase in these new and different technologies, but the day is fast approaching when these blocks of airspace will require participation for access and that will require installation of some additional avionics.  

Resources

FAA Advance Notice: North Atlantic FANS 1/A Data Link Mandate (77 KB, PDF)

NavCanada AIC: 24/12- Mandate for Data Link Services in the NAT (50 KB, PDF)

For additional information contact the NBAA Operations Service Group at (202) 783-9250.