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 62/30 63/40 63/50 MAXAR 310 320 330 350 360 370
A 11 Dec 1130 UTC 11 Dec 1900 UTC BALIX 61/20 63/30 63/40 62/50 PIDSO 310 320 330 350 360 370
B 10 Dec 1130 UTC 10 Dec 1900 UTC GOMUP 59/20 61/30 62/40 62/50 PIDSO 310 320 330 350 360 370 380 390
B 11 Dec 1130 UTC 11 Dec 1900 UTC ERAKA 60/20 62/30 62/40 61/50 SAVRY 310 320 330 350 360 370
C 11 Dec 1130 UTC 11 Dec 1900 UTC GOMUP 59/20 61/30 61/40 60/50 URTAK 310 320 330 350 360 370 380 390
C 10 Dec 1130 UTC 10 Dec 1900 UTC SUNOT 58/20 60/30 61/40 61/50 SAVRY 310 320 330 350 360 370 380 390
D 11 Dec 1130 UTC 11 Dec 1900 UTC DINIM 50/20 47/30 44/40 42/50 42/60 DOVEY 310 320 330 350 360 370 390
D 10 Dec 1130 UTC 10 Dec 1900 UTC MALOT 53/20 52/30 49/40 46/50 SUPRY 310 320 330 350 360 370 390
E 10 Dec 1130 UTC 10 Dec 1900 UTC LIMRI 52/20 51/30 48/40 45/50 RAFIN 310 320 330 350 360 370 390
E 11 Dec 1130 UTC 11 Dec 1900 UTC SOMAX 49/20 46/30 43/40 41/50 41/60 JOBOC 310 320 330 350 360 370 390
F 10 Dec 1130 UTC 10 Dec 1900 UTC DINIM 51/20 50/30 47/40 44/50 42/60 DOVEY 310 320 330 350 360 370 390
F 11 Dec 1130 UTC 11 Dec 1900 UTC BEDRA 48/20 45/30 42/40 40/50 39/60 310 320 330 350 360 370 390
G 10 Dec 1130 UTC 10 Dec 1900 UTC SOMAX 50/20 49/30 46/40 43/50 41/60 JOBOC 310 320 330 350 360 370 390
G 11 Dec 1130 UTC 11 Dec 1900 UTC 38/40 35/50 33/60 320 340 360 380
H 10 Dec 1130 UTC 10 Dec 1900 UTC 45/40 41/50 35/60 320 340 360 380
J 10 Dec 1130 UTC 10 Dec 1900 UTC 43/40 39/50 33/60 320 340 360 380
R 10 Dec 0100 UTC 10 Dec 0800 UTC RIKAL 53/50 54/40 55/30 55/20 RESNO NETKI 320 330 340 350 360 370 380 390 400
S 10 Dec 0100 UTC 10 Dec 0800 UTC TUDEP 52/50 53/40 54/30 54/20 DOGAL BEXET 320 330 340 350 360 370 380 390 400
S 11 Dec 0100 UTC 11 Dec 0800 UTC RIKAL 53/50 54/40 55/30 54/20 DOGAL BEXET 320 330 340 350 360 370 380 390 400
T 10 Dec 0100 UTC 10 Dec 0800 UTC UMESI 5130/50 5230/40 5330/30 5330/20 NEBIN OLGON 350 360 370 380 390
T 11 Dec 0100 UTC 11 Dec 0800 UTC TUDEP 52/50 53/40 54/30 53/20 MALOT GISTI 320 330 340 350 360 370 380 390 400
U 11 Dec 0100 UTC 11 Dec 0800 UTC UMESI 5130/50 5230/40 5330/30 5230/20 TOBOR RILED 350 360 370 380 390
U 10 Dec 0100 UTC 10 Dec 0800 UTC ALLRY 51/50 52/40 53/30 53/20 MALOT GISTI 320 330 340 350 360 370 380 390 400
V 10 Dec 0100 UTC 10 Dec 0800 UTC BUDAR 5030/50 5130/40 5230/30 5230/20 TOBOR RILED 350 360 370 380 390
V 11 Dec 0100 UTC 11 Dec 0800 UTC ALLRY 51/50 52/40 53/30 52/20 LIMRI XETBO 320 330 340 350 360 370 380 390 400
W 10 Dec 0100 UTC 10 Dec 0800 UTC ELSIR 50/50 51/40 52/30 52/20 LIMRI XETBO 320 330 340 350 360 370 380 390 400
W 11 Dec 0100 UTC 11 Dec 0800 UTC BUDAR 5030/50 5130/40 5230/30 5130/20 ADARA LEKVA 350 360 370 380 390
X 10 Dec 0100 UTC 10 Dec 0800 UTC JOOPY 49/50 50/40 51/30 51/20 DINIM ELSOX 320 330 340 350 360 370 380 390 400
X 11 Dec 0100 UTC 11 Dec 0800 UTC ELSIR 50/50 51/40 52/30 51/20 DINIM ELSOX 320 330 340 350 360 370 380 390 400
Y 10 Dec 0100 UTC 10 Dec 0800 UTC NICSO 48/50 49/40 50/30 50/20 SOMAX ATSUR 320 330 340 350 360 370 380 390 400
Y 11 Dec 0100 UTC 11 Dec 0800 UTC JOOPY 49/50 50/40 51/30 50/20 SOMAX ATSUR 320 330 340 350 360 370 380 390 400
Z 10 Dec 0100 UTC 10 Dec 0800 UTC MUNEY 41/60 44/50 47/40 49/30 49/20 BEDRA NASBA 320 360 380 400
Z 11 Dec 0100 UTC 11 Dec 0800 UTC SOORY 44/50 48/40 50/30 49/20 BEDRA NASBA 320 360 380 400
Warning: Do not use this data for real-world aviation or navigation. No guarantee of current accuracy is given.