North Atlantic Tracks (NATs) are daily high altitude transatlantic routes between western Europe and the eastern coast of North-America, which provide consistent separation between aircraft. Westward tracks are named incrementally from the beginning of the alphabet (A,B,C...), with the northernmost tracks named first. Similarly, eastward tracks are named incrementally from the end of the alphabet (Z,Y,X...), with the southernmost tracks named first. Daily updates for each direction allow for routing around weather systems and tracking of favourable tailwinds to improve efficiency.

The map below shows the current valid NATs and the upcoming published NATs, along with the permissible flight levels in each direction.
Track Valid From Valid To Route East Levels West Levels
A 10 Dec 1130 UTC 10 Dec 1900 UTC ERAKA 60/20 61/30 61/40 60/50 URTAK - 310 320 330 350 360 370
A 09 Dec 1130 UTC 09 Dec 1900 UTC SUNOT 58/20 60/30 60/40 59/50 - 310 320 330 350 360 370 380 390
B 10 Dec 1130 UTC 10 Dec 1900 UTC GOMUP 59/20 60/30 60/40 59/50 - 310 320 330 350 360 370 380 390
B 09 Dec 1130 UTC 09 Dec 1900 UTC PIKIL 57/20 59/30 59/40 58/50 - 310 320 330 340 350 360 370 380 390
C 10 Dec 1130 UTC 10 Dec 1900 UTC SUNOT 58/20 59/30 59/40 CUDDY - 310 320 330 340 350 360 370 380 390
D 10 Dec 1130 UTC 10 Dec 1900 UTC PIKIL 57/20 58/30 58/40 57/50 - 310 320 330 340 350 360 370 380 390
D 09 Dec 1130 UTC 09 Dec 1900 UTC RESNO 56/20 58/30 58/40 57/50 - 310 320 330 340 350 360 370 380 390
E 09 Dec 1130 UTC 09 Dec 1900 UTC DOGAL 55/20 57/30 57/40 56/50 - 310 320 330 340 350 360 370 380 390
F 10 Dec 1130 UTC 10 Dec 1900 UTC RESNO 56/20 57/30 57/40 56/50 - 310 320 330 340 350 360 370 380 390
F 09 Dec 1130 UTC 09 Dec 1900 UTC MALOT 54/20 55/30 55/40 54/50 - 310 320 330 340 350 360 370 380 390
G 10 Dec 1130 UTC 10 Dec 1900 UTC DOGAL 55/20 56/30 56/40 55/50 - 310 320 330 340 350 360 370 380 390
R 10 Dec 0100 UTC 10 Dec 0800 UTC 49/50 52/40 54/30 55/20 RESNO NETKI 320 330 340 350 360 370 380 390 400 -
S 10 Dec 0100 UTC 10 Dec 0800 UTC 48/50 51/40 53/30 54/20 DOGAL BEXET 320 330 340 350 360 370 380 390 400 -
T 10 Dec 0100 UTC 10 Dec 0800 UTC 47/50 50/40 52/30 53/20 MALOT GISTI 320 330 340 350 360 370 380 390 400 -
U 10 Dec 0100 UTC 10 Dec 0800 UTC 46/50 49/40 51/30 52/20 LIMRI XETBO 320 330 340 350 360 370 380 390 400 -
V 10 Dec 0100 UTC 10 Dec 0800 UTC RAFIN 45/50 48/40 50/30 51/20 DINIM ELSOX 320 330 340 350 360 370 380 390 400 -
W 10 Dec 0100 UTC 10 Dec 0800 UTC DOVEY 42/60 44/50 47/40 49/30 50/20 SOMAX ATSUR 320 330 350 360 380 390 400 -
X 10 Dec 0100 UTC 10 Dec 0800 UTC JOBOC 41/60 43/50 46/40 48/30 49/20 BEDRA NERTU 320 330 350 360 380 390 400 -
Y 10 Dec 0100 UTC 10 Dec 0800 UTC SLATN 40/60 41/50 42/40 350 370 -
Z 10 Dec 0100 UTC 10 Dec 0800 UTC MUNEY 40/60 42/50 45/40 47/30 48/20 48/15 OMOKO GUNSO 320 330 360 380 390 400 -
Warning: Do not use this data for real-world aviation or navigation. No guarantee of current accuracy is given.