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 31 Mar 1130 UTC 31 Mar 1900 UTC GOMUP 58/15 58/20 58/30 57/40 56/50 JANJO 340 350 360 370 380 390
A 30 Mar 1130 UTC 30 Mar 1900 UTC SUNOT 57/20 57/30 56/40 54/50 NEEKO 340 350 360 370 380 390
B 31 Mar 1130 UTC 31 Mar 1900 UTC SUNOT 57/20 57/30 56/40 55/50 LOMSI 340 350 360 370 380 390
B 30 Mar 1130 UTC 30 Mar 1900 UTC BILTO 5630/20 5630/30 5530/40 5330/50 PELTU 350 360 370 380 390
D 31 Mar 1130 UTC 31 Mar 1900 UTC RESNO 55/20 55/30 54/40 53/50 RIKAL 340 350 360 370 380 390
E 31 Mar 1130 UTC 31 Mar 1900 UTC DOGAL 54/20 54/30 53/40 52/50 TUDEP 340 350 360 370 380 390
E 30 Mar 1130 UTC 30 Mar 1900 UTC RESNO 55/20 55/30 54/40 52/50 TUDEP 340 350 360 370 380 390
Q 01 Apr 0100 UTC 01 Apr 0800 UTC ELSIR 50/50 52/40 53/30 54/20 DOGAL BEXET 340 350 360 370 380 390 400
R 01 Apr 0100 UTC 01 Apr 0800 UTC JOOPY 49/50 51/40 52/30 53/20 MALOT GISTI 340 350 360 370 380 390 400
S 01 Apr 0100 UTC 01 Apr 0800 UTC NICSO 48/50 50/40 51/30 52/20 LIMRI XETBO 340 350 360 370 380 390 400
T 01 Apr 0100 UTC 01 Apr 0800 UTC PORTI 47/50 49/40 50/30 51/20 DINIM ELSOX 340 350 360 370 380 390 400
U 31 Mar 0100 UTC 31 Mar 0800 UTC SUPRY 46/50 48/40 49/30 51/20 DINIM ELSOX 340 350 360 370 380 390 400
U 01 Apr 0100 UTC 01 Apr 0800 UTC SUPRY 46/50 48/40 49/30 50/20 SOMAX ATSUR 340 350 360 370 380 390 400
V 31 Mar 0100 UTC 31 Mar 0800 UTC RAFIN 45/50 47/40 48/30 50/20 SOMAX ATSUR 340 350 360 370 380 390 400
V 01 Apr 0100 UTC 01 Apr 0800 UTC RAFIN 45/50 47/40 48/30 49/20 BEDRA NASBA 350 360 380 390 400
W 31 Mar 0100 UTC 31 Mar 0800 UTC DOVEY 42/60 44/50 46/40 47/30 49/20 BEDRA NASBA 350 360 380 390 400
W 01 Apr 0100 UTC 01 Apr 0800 UTC DOVEY 42/60 44/50 46/40 47/30 48/20 48/15 OMOKO GUNSO 350 360 380 390 400
X 31 Mar 0100 UTC 31 Mar 0800 UTC JOBOC 41/60 43/50 45/40 46/30 48/20 48/15 ETIKI REGHI 350 360 380 390 400
X 01 Apr 0100 UTC 01 Apr 0800 UTC JOBOC 41/60 43/50 45/40 46/30 47/20 47/15 ETIKI REGHI 350 360 380 390 400
Y 01 Apr 0100 UTC 01 Apr 0800 UTC SLATN 40/60 41/50 43/40 350 370 390
Y 31 Mar 0100 UTC 31 Mar 0800 UTC SLATN 40/60 42/50 43/40 350 370
Z 31 Mar 0100 UTC 31 Mar 0800 UTC 36/60 40/50 44/40 45/30 47/20 47/15 SEPAL LAPEX 360 380 390 400
Z 01 Apr 0100 UTC 01 Apr 0800 UTC SOORY 42/50 44/40 45/30 46/20 46/15 SEPAL LAPEX 360 380 400
Warning: Do not use this data for real-world aviation or navigation. No guarantee of current accuracy is given.