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 17 Nov 1130 UTC 17 Nov 1900 UTC GOMUP 59/20 60/30 60/40 58/50 DORYY 310 320 330 340 350 360 370 380 390
A 16 Nov 1130 UTC 16 Nov 1900 UTC ERAKA 60/20 62/30 63/40 63/50 KETLA 310 320 330 350 360 370
B 16 Nov 1130 UTC 16 Nov 1900 UTC GOMUP 59/20 61/30 61/40 60/50 URTAK 310 320 330 350 360 370 380 390
B 17 Nov 1130 UTC 17 Nov 1900 UTC 58/20 59/30 59/40 57/50 HOIST 310 320 330 340 350 360 370 380 390
C 16 Nov 1130 UTC 16 Nov 1900 UTC 58/20 60/30 60/40 59/50 AVUTI 310 320 330 350 360 370 380 390
D 17 Nov 1130 UTC 17 Nov 1900 UTC 56/20 57/30 57/40 55/50 LOMSI 310 320 330 340 350 360 370 380 390
D 16 Nov 1130 UTC 16 Nov 1900 UTC 5730/20 5930/30 5930/40 5830/50 BOKTO 350 360 370 380 390
E 17 Nov 1130 UTC 17 Nov 1900 UTC 55/20 56/30 56/40 54/50 NEEKO 310 320 330 340 350 360 370 380 390
F 16 Nov 1130 UTC 16 Nov 1900 UTC 56/20 58/30 58/40 57/50 HOIST 310 320 330 340 350 360 370 380 390
G 16 Nov 1130 UTC 16 Nov 1900 UTC 55/20 57/30 57/40 56/50 JANJO 310 320 330 340 350 360 370 380 390
H 16 Nov 1130 UTC 16 Nov 1900 UTC MALOT 54/20 56/30 56/40 55/50 LOMSI 310 320 330 340 350 360 370 380 390
Q 16 Nov 0100 UTC 16 Nov 0800 UTC JOOPY 49/50 50/40 52/30 54/20 BEXET 320 330 340 350 360 370 380 390 400
R 16 Nov 0100 UTC 16 Nov 0800 UTC NICSO 48/50 49/40 51/30 53/20 MALOT GISTI 320 330 340 350 360 370 380 390 400
S 16 Nov 0100 UTC 16 Nov 0800 UTC PORTI 47/50 48/40 50/30 52/20 LIMRI XETBO 320 330 340 350 360 370 380 390 400
T 17 Nov 0100 UTC 17 Nov 0800 UTC ELSIR 50/50 51/40 52/30 53/20 MALOT GISTI 320 330 340 350 360 370 380 390 400
T 16 Nov 0100 UTC 16 Nov 0800 UTC RELIC 4630/50 4730/40 4930/30 5130/20 ADARA LEKVA 350 360 370 380 390
U 17 Nov 0100 UTC 17 Nov 0800 UTC JOOPY 49/50 50/40 51/30 52/20 LIMRI XETBO 320 330 340 350 360 370 380 390 400
U 16 Nov 0100 UTC 16 Nov 0800 UTC SUPRY 46/50 47/40 49/30 51/20 320 330 340 350 360 370 380 390 400
V 17 Nov 0100 UTC 17 Nov 0800 UTC MUSAK 4830/50 4930/40 5030/30 5130/20 ADARA LEKVA 350 360 370 380 390
V 16 Nov 0100 UTC 16 Nov 0800 UTC RAFIN 45/50 46/40 48/30 50/20 320 330 340 350 360 370 380 390 400
W 17 Nov 0100 UTC 17 Nov 0800 UTC NICSO 48/50 49/40 50/30 51/20 320 330 340 350 360 370 380 390 400
W 16 Nov 0100 UTC 16 Nov 0800 UTC DOVEY 42/60 44/50 45/40 47/30 49/20 320 330 350 360 380 390 400
X 17 Nov 0100 UTC 17 Nov 0800 UTC PORTI 47/50 48/40 49/30 50/20 320 330 340 350 360 370 380 390 400
X 16 Nov 0100 UTC 16 Nov 0800 UTC JOBOC 41/60 41/50 41/40 350 370
Y 16 Nov 0100 UTC 16 Nov 0800 UTC MUNEY 40/60 43/50 44/40 46/30 48/20 48/15 OMOKO 320 330 360 380 390 400
Y 17 Nov 0100 UTC 17 Nov 0800 UTC SUPRY 46/50 47/40 48/30 49/20 320 330 350 360 380 390 400
Z 16 Nov 0100 UTC 16 Nov 0800 UTC SOORY 42/50 43/40 45/30 47/20 47/15 ETIKI REGHI 320 330 360 380 390 400
Z 17 Nov 0100 UTC 17 Nov 0800 UTC MUNEY 41/60 44/50 46/40 47/30 48/20 48/15 OMOKO 320 360 380 400
Warning: Do not use this data for real-world aviation or navigation. No guarantee of current accuracy is given.