In Dec 2017 Datalink Mandate Phase 2B began..
Datalink (CPDLC and ADS-C) is required through-out the NAT/HLA from Fl350 to FL390 (inclusive) excluding the NAT Surveillance Airspace.
Phase 2C will begin 30 Jan 2020, requiring Datalink throughout the Nat-HLA region Fl290 and above.
NOTICE TO CUSTOMERS REGARDING
North Atlantic Airspace changes
Gander Oceanic Airspace has been reduced in size and the western boundary has been moved further east. There are numerous additional waypoints which are referred to as Oceanic Entry Points that have been introduced in the Gander Domestic Airspace. These waypoints support routings to and from the 50W Longitude line. PBN has begun and the MNPS airspace has been renamed NAT/HLA. Operators are required to have an approval from their state of registry to operate from FL285 to FL420.
RLatSM (Reduced Lateral Separation Minimum) trials supporting 23NM (effectively 30NM) separations will officially end and become a requirement on 29 Mar 2018.
Track spacing for NAT/HLA approved aircraft is currently one degree of latitude, which equates nominally to 60 NM. The RLatSM change reduced lateral separation for aircraft operating on tracks identified in the Track Message for the day, as RLatSM tracks providing one-half-degree of latitude separation. Currently Mar 2018 RLatSM may be implemented daily on any track from FL350 to and including FL390.
RLatSM waypoint may be whole degree or half degree Latitudes. The write up below this deals with the Nav Database changes that reflect inputting an ARINC 5 character Latitude and Longitude into an FMS which reflect this one-half degree separation. Detailed information on RLatSM can be found in the Nav Canada AIC 31/14 ...http://www.navcanada.ca/EN/products-and-services/Documents/AIP/Current/part_5_aic/5aic_eng.pdf
www.navcanada.ca/EN/products-and-services/Documents/AIP/Next/part_5_AIC/5AIC_eng_2014_20.pdf
Important change to the Arinc coded waypoints... With the application of ADS-C and CPDLC in the North Atlantic, provision has now been made in preparation of 1/2 degree Latitude waypoint separation. Several GNE's have occurred recently because crews are not following proper SOP for waypoint validation after entry into the FMS. The new formatting that accommodates 1/2 degree separation is as follows:
N4850 is equivalent to 48 degrees 30 mins North, and 050 west. Compare that to 4850N, which is 48 degrees North 050 West. By placing the N,S,E or W in front of the four numbers, we end up with the provision for 30 minutes of latitude.
This is only used in the North Atlantic.
The proper method to verify an Arinc named waypoint, is to always line select the waypoint once the FMS accepts it, and verify the full Latitude and Longitude. This will ensure the operator does not earn a GNE or worse, lose separation between another A/C. As a reminder, the format for whole degrees named waypoint are in the Green ICRH provided to each of you when you received our training.
