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 24 May 1130 UTC 24 May 1900 UTC RESNO 55/20 57/30 58/40 58/50 DORYY 310 320 330 340 350 360 370 380 390
B 25 May 1130 UTC 25 May 1900 UTC RESNO 56/20 57/30 57/40 55/50 LOMSI 310 320 330 340 350 360 370 380 390
B 24 May 1130 UTC 24 May 1900 UTC DOGAL 54/20 56/30 57/40 57/50 HOIST 310 320 330 340 350 360 370 380 390
C 25 May 1130 UTC 25 May 1900 UTC VENER 5530/20 5630/30 5630/40 5430/50 MELDI 350 360 370 380 390
C 24 May 1130 UTC 24 May 1900 UTC MALOT 53/20 55/30 56/40 56/50 JANJO 310 320 330 340 350 360 370 380 390
D 25 May 1130 UTC 25 May 1900 UTC DOGAL 55/20 56/30 56/40 54/50 NEEKO 310 320 330 340 350 360 370 380 390
D 24 May 1130 UTC 24 May 1900 UTC TOBOR 5230/20 5430/30 5530/40 5530/50 KODIK 350 360 370 380 390
E 24 May 1130 UTC 24 May 1900 UTC LIMRI 52/20 54/30 55/40 55/50 LOMSI 310 320 330 340 350 360 370 380 390
E 25 May 1130 UTC 25 May 1900 UTC MALOT 54/20 55/30 55/40 53/50 RIKAL 310 320 330 340 350 360 370 380 390
F 24 May 1130 UTC 24 May 1900 UTC DINIM 51/20 53/30 54/40 54/50 NEEKO 310 320 330 340 350 360 370 380 390
G 24 May 1130 UTC 24 May 1900 UTC SOMAX 50/20 52/30 53/40 53/50 RIKAL 310 320 330 340 350 360 370 380 390
H 24 May 1130 UTC 24 May 1900 UTC BEDRA 49/20 51/30 52/40 52/50 TUDEP 310 320 330 340 350 360 370 380 390
J 24 May 1130 UTC 24 May 1900 UTC ETIKI 48/15 48/20 50/30 51/40 51/50 ALLRY 310 320 330 350 360 370 390
N 25 May 0100 UTC 25 May 0800 UTC URTAK 60/50 61/40 61/30 60/20 BALIX NINEX 320 340 360 380 400
P 25 May 0100 UTC 25 May 0800 UTC AVUTI 59/50 60/40 60/30 59/20 ERAKA ETSOM 320 340 360 380 400
Q 25 May 0100 UTC 25 May 0800 UTC JOOPY 49/50 51/40 53/30 56/20 PIKIL SOVED 320 330 340 350 360 370 380 390 400
R 25 May 0100 UTC 25 May 0800 UTC NICSO 48/50 50/40 52/30 55/20 RESNO NETKI 320 330 340 350 360 370 380 390 400
S 25 May 0100 UTC 25 May 0800 UTC PORTI 47/50 49/40 51/30 54/20 DOGAL BEXET 320 330 340 350 360 370 380 390 400
T 25 May 0100 UTC 25 May 0800 UTC SUPRY 46/50 48/40 50/30 53/20 MALOT GISTI 320 330 340 350 360 370 380 390 400
U 25 May 0100 UTC 25 May 0800 UTC RAFIN 45/50 47/40 49/30 52/20 LIMRI XETBO 320 330 340 350 360 370 380 390 400
V 25 May 0100 UTC 25 May 0800 UTC DOVEY 42/60 44/50 46/40 48/30 51/20 DINIM ELSOX 320 340 360 380 400
W 25 May 0100 UTC 25 May 0800 UTC JOBOC 41/60 42/50 43/40 340 370
X 25 May 0100 UTC 25 May 0800 UTC SOORY 43/50 45/40 47/30 50/20 SOMAX ATSUR 320 360 380 400
Y 25 May 0100 UTC 25 May 0800 UTC 36/60 41/50 44/40 46/30 49/20 BEDRA NASBA 320 360 380 400
Z 25 May 0100 UTC 25 May 0800 UTC 37/50 42/40 45/30 48/20 48/15 OMOKO GUNSO 320 360 380 400
Warning: Do not use this data for real-world aviation or navigation. No guarantee of current accuracy is given.