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 Aug 1130 UTC 24 Aug 1900 UTC BALIX 61/20 62/30 62/40 61/50 SAVRY 310 320 330 350 360 370
A 23 Aug 1130 UTC 23 Aug 1900 UTC BALIX 61/20 63/30 64/40 63/50 MAXAR 310 320 330 350 360 370
B 24 Aug 1130 UTC 24 Aug 1900 UTC ERAKA 60/20 61/30 61/40 60/50 URTAK 310 320 330 350 360 370
B 23 Aug 1130 UTC 23 Aug 1900 UTC ERAKA 60/20 62/30 63/40 62/50 PIDSO 310 320 330 350 360 370
C 24 Aug 1130 UTC 24 Aug 1900 UTC GOMUP 59/20 60/30 60/40 59/50 AVUTI 310 320 330 350 360 370 380 390
C 23 Aug 1130 UTC 23 Aug 1900 UTC GOMUP 59/20 61/30 62/40 61/50 SAVRY 310 320 330 350 360 370 380 390
D 24 Aug 1130 UTC 24 Aug 1900 UTC SUNOT 58/20 59/30 59/40 58/50 DORYY 310 320 330 340 350 360 370 380 390
D 23 Aug 1130 UTC 23 Aug 1900 UTC SUNOT 58/20 60/30 61/40 60/50 URTAK 310 320 330 350 360 370 380 390
E 24 Aug 1130 UTC 24 Aug 1900 UTC BILTO 5730/20 5830/30 5830/40 5730/50 ENNSO 350 360 370 380 390
F 23 Aug 1130 UTC 23 Aug 1900 UTC RESNO 56/20 58/30 59/40 58/50 DORYY 310 320 330 340 350 360 370 380 390
G 24 Aug 1130 UTC 24 Aug 1900 UTC RESNO 56/20 57/30 57/40 56/50 JANJO 310 320 330 340 350 360 370 380 390
G 23 Aug 1130 UTC 23 Aug 1900 UTC 44/40 43/50 42/60 DOVEY 320 340 360 380
H 23 Aug 1130 UTC 23 Aug 1900 UTC 43/40 42/50 SOORY 320 340 360 380
J 23 Aug 1130 UTC 23 Aug 1900 UTC 42/40 41/50 37/60 320 340 360 380
R 24 Aug 0100 UTC 24 Aug 0800 UTC NEEKO 54/50 54/40 55/30 55/20 RESNO NETKI 320 330 340 350 360 370 380 390 400
S 24 Aug 0100 UTC 24 Aug 0800 UTC RIKAL 53/50 53/40 54/30 54/20 DOGAL BEXET 320 330 340 350 360 370 380 390 400
T 23 Aug 0100 UTC 23 Aug 0800 UTC ALLRY 51/50 52/40 53/30 54/20 DOGAL BEXET 320 330 340 350 360 370 380 390 400
T 24 Aug 0100 UTC 24 Aug 0800 UTC SAXAN 5230/50 5230/40 5330/30 5330/20 NEBIN OLGON 350 360 370 380 390
U 23 Aug 0100 UTC 23 Aug 0800 UTC ELSIR 50/50 51/40 52/30 53/20 MALOT GISTI 320 330 340 350 360 370 380 390 400
U 24 Aug 0100 UTC 24 Aug 0800 UTC TUDEP 52/50 52/40 53/30 53/20 MALOT GISTI 320 330 340 350 360 370 380 390 400
V 23 Aug 0100 UTC 23 Aug 0800 UTC IBERG 4930/50 5030/40 5130/30 5230/20 TOBOR RILED 350 360 370 380 390
V 24 Aug 0100 UTC 24 Aug 0800 UTC ALLRY 51/50 51/40 52/30 52/20 LIMRI XETBO 320 330 340 350 360 370 380 390 400
W 24 Aug 0100 UTC 24 Aug 0800 UTC BUDAR 5030/50 5030/40 5130/30 5130/20 ADARA LEKVA 350 360 370 380 390
W 23 Aug 0100 UTC 23 Aug 0800 UTC JOOPY 49/50 50/40 51/30 52/20 LIMRI XETBO 320 330 340 350 360 370 380 390 400
X 24 Aug 0100 UTC 24 Aug 0800 UTC ELSIR 50/50 50/40 51/30 51/20 DINIM ELSOX 320 330 340 350 360 370 380 390 400
X 23 Aug 0100 UTC 23 Aug 0800 UTC NICSO 48/50 49/40 50/30 51/20 DINIM ELSOX 320 330 340 350 360 370 380 390 400
Y 24 Aug 0100 UTC 24 Aug 0800 UTC JOOPY 49/50 49/40 50/30 50/20 SOMAX ATSUR 320 330 340 350 360 370 380 390 400
Y 23 Aug 0100 UTC 23 Aug 0800 UTC PORTI 47/50 48/40 49/30 50/20 SOMAX ATSUR 320 330 340 350 360 370 380 390 400
Z 24 Aug 0100 UTC 24 Aug 0800 UTC SOORY 44/50 48/40 49/30 49/20 BEDRA NASBA 320 340 380 400
Z 23 Aug 0100 UTC 23 Aug 0800 UTC SOORY 44/50 47/40 48/30 49/20 BEDRA NASBA 320 340 380 400
Warning: Do not use this data for real-world aviation or navigation. No guarantee of current accuracy is given.