NMD/NOM/NOS |
Information Notice |
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Doc. ID : IN/15-068 |
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Issued on: |
Subject |
Validity |
NOP Portal:No Briefing::Yes (self-briefing via video) |
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09/09/2016 By : HOT |
Reduced Lateral Separation Minima (RLAT) within the North Atlantic Airspace – Phase 1 |
From: 17/09/2015 To: 10/12/2015
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Applicability |
AD |
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FCM |
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FPL |
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Introduction
Reduced Lateral Separation (RLAT) will allow aircraft to be separated laterally within the North Atlantic Airspace 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.
As a result more aircraft will be able to fly at their optimum levels thus reducing fuel consumption and CO2 emissions.
Phase 1 of RLAT trial within Shanwick/Gander airspace is planned to commence on 12th Nov 2015. It will consist in the introduction of a single uni-directional track between the core OTS tracks.
Phase 2 of the trial, which will see reduced lateral separation be expanded across all organised tracks, is expected to follow “within 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 later.
RLAT Operations
Eligibility
Operators wishing to flight plan in RLAT operations shall ensure that flights meet the following CNS (Communication, Navigation and Surveillance) requirements:
Communication: CPDLC equipped
Navigation: MNPS equipped, RNP4 approved
Surveillance: ADS-C equipped
It is important to note that IFPS will not perform a check between the CNS requirements and flight planning in RLAT operations.
RLAT Trial area of operations
RLAT trial Phase 1 consists in the addition of a single un-directional track in between 2 tracks as shown below:
OTS message
RLAT will not affect the organisation of the OTS track structure promulgation procedure. The OTS track message will contain in note 3 the RLAT tracks:
3 RLATSM OTS TRACKS AND FLIGHT LEVELS ARE AS FOLLOWS
TRACK B 350 360 370 380 390
TRACK C 350 360 370 380 390
TRACK D 350 360 370 380 390
And composition of RLAT tracks will be underlined:
B RESNO 56/20 57/30 58/40 57/50 HOIST
AIRAC changes
AIRAC 1510 (17th of September)
Two Oceanic fixes (ADODO, ETILO) and their associated landfall fixes (AMTAP, EVNAL) are introduced at the Scottish/Shanwick boundary.
RAD Appendix 4 is adapted to reflect the additional points and their corresponding RAD units.
Example:
NEW |
AMTAP |
KUVOX |
MEA |
660 |
Yes |
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When D701C is active |
EG50073 |
Provide FPL connectivity from new RLAT Oceanic Exit point |
NEW |
ADODO |
AMTAP |
MEA |
660 |
Yes |
Compulsory for traffic |
H24 |
EG50074 |
Provide FPL connectivity from new RLAT Oceanic Exit point |
AIRAC 1512 (12th of November)
Two Oceanic fixes (LUSEN, ORTAV) and their associated landfall fixes (ELKOG, ODPEX) are introduced at the Scottish/Shanwick boundary.
Two Oceanic fixes (UMLER, BUNAV) and their associated landfall fixes (UMOXA, TIVLU) are introduced at the Brest/Shanwick boundary.
RAD Appendix 4 is adapted to reflect the additional points and their corresponding RAD units.
Eastbound and Westbound OTS tracks contain an additional single track in between two core tracks as shown previously.
Support documents and self-briefing
Support Documents
Attached to this information notice are:
AIC Y 065/2015
NATS RLAT Implementation Airline Briefing
Self-briefing NATS video
The video can be accessed at: http://www.nats.aero/rlat/
Giovanni Lenti - Head of Network Operations Services
+see attachment
NOTE: The official electronic version takes precedence over any paper copies (except in the event of contingency) |
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