Reduced Lateral Separation Minima within the North Atlantic
Reduced Lateral Separation (RLat) will allow aircraft to be separated laterally by a minimum of 25 Nm, improving the efficiency of North Atlantic operations.
In practice, flights will be separated by ½ degree of latitude rather than the 1 degree currently applied between suitably equipped aircraft.
The first phase of RLat within Shanwick/Gander airspace is planned to commence on 12th Nov 2015. This will trial the introduction of a single uni-directional track between the core OTS tracks.
The ICAO North Atlantic Systems Planning Group (NAT SPG) has advised that it expects that Phase 2 of the trial, which will see reduced lateral separation be expanded across all organised tracks, to take place “within around a year” of Phase 1 introduction.
The final phase which would see the expansion of the trial across the entire Shanwick / Gander airspace will follow in the future.
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Crew Procedures & Briefing
NATS has produced an airline briefing video and handout to cover the introduction of RLat for both crew and flight planning
If you have any questions on RLat please contact firstname.lastname@example.org
- UK AIC 071/2016 – Provides detailed information on the use of ‘Confirm Assigned Route’ CPDLC message in Shanwick
- Download crew briefing sheet
- UK AIC 065/2015 – Provides detailed information on the trial of 25nm lateral separation minimum in the North Atlantic Region.
- NAT Ops Bulletin 2015_003 – Detailed information and references to existing procedures relevant to RLatSM operations.
- UK AIC 059/2015 – Recommended Use of ARINC-424 Identifiers for Half-Degree Waypoints in the Shanwick Oceanic Control Area.
- Information Notice IN-2015/0NN
- RLat Slidepack from customer briefing
- RLAT FAQs (4 September)