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 20 Feb 1130 UTC 20 Feb 1900 UTC GUNPA 64/10 66/20 66/30 65/40 63/50 MAXAR 350 360 370
A 21 Feb 1130 UTC 21 Feb 1900 UTC GUNPA 64/10 66/20 66/30 65/40 63/50 MAXAR 350 360 370
B 21 Feb 1130 UTC 21 Feb 1900 UTC PEMOS 63/10 65/20 65/30 64/40 62/50 PIDSO 350 360 370
B 20 Feb 1130 UTC 20 Feb 1900 UTC PEMOS 63/10 65/20 65/30 64/40 62/50 PIDSO 350 360 370
C 21 Feb 1130 UTC 21 Feb 1900 UTC BALIX 61/20 62/30 61/40 59/50 BOKTO 340 350 360 370
C 20 Feb 1130 UTC 20 Feb 1900 UTC ATSIX 62/20 64/30 63/40 61/50 SAVRY 350 360 370
D 21 Feb 1130 UTC 21 Feb 1900 UTC ERAKA 60/20 61/30 60/40 58/50 DORYY 340 350 360 370
D 20 Feb 1130 UTC 20 Feb 1900 UTC BALIX 61/20 63/30 62/40 60/50 URTAK 350 360 370
E 20 Feb 1130 UTC 20 Feb 1900 UTC ERAKA 60/20 62/30 61/40 59/50 AVUTI 350 360 370
E 21 Feb 1130 UTC 21 Feb 1900 UTC GOMUP 59/20 60/30 59/40 57/50 HOIST 340 350 360 370 380 390
F 21 Feb 1130 UTC 21 Feb 1900 UTC SUNOT 58/20 59/30 58/40 56/50 JANJO 340 350 360 370 380 390
T 20 Feb 0100 UTC 20 Feb 0800 UTC NICSO 48/50 50/40 52/30 53/20 MALOT GISTI 340 350 360 370 380 390 400
U 20 Feb 0100 UTC 20 Feb 0800 UTC PORTI 47/50 49/40 51/30 52/20 LIMRI XETBO 340 350 360 370 380 390 400
U 21 Feb 0100 UTC 21 Feb 0800 UTC PORTI 47/50 49/40 52/30 53/20 MALOT GISTI 340 350 360 370 380 390 400
V 20 Feb 0100 UTC 20 Feb 0800 UTC SUPRY 46/50 48/40 50/30 51/20 DINIM ELSOX 340 350 360 370 380 390 400
V 21 Feb 0100 UTC 21 Feb 0800 UTC SUPRY 46/50 48/40 51/30 52/20 LIMRI XETBO 340 350 360 370 380 390 400
W 21 Feb 0100 UTC 21 Feb 0800 UTC RAFIN 45/50 47/40 50/30 51/20 DINIM ELSOX 340 350 360 370 380 390 400
W 20 Feb 0100 UTC 20 Feb 0800 UTC RAFIN 45/50 47/40 49/30 50/20 SOMAX ATSUR 350 360 380 390 400
X 21 Feb 0100 UTC 21 Feb 0800 UTC JOBOC 42/60 44/50 46/40 49/30 50/20 SOMAX ATSUR 360 380 390 400
X 20 Feb 0100 UTC 20 Feb 0800 UTC DOVEY 42/60 44/50 46/40 48/30 49/20 BEDRA NASBA 340 360 380 390 400
Y 20 Feb 0100 UTC 20 Feb 0800 UTC SLATN 40/60 41/50 43/40 350 370
Y 21 Feb 0100 UTC 21 Feb 0800 UTC SLATN 41/60 42/50 44/40 350 370
Z 20 Feb 0100 UTC 20 Feb 0800 UTC SOORY 43/50 45/40 47/30 48/20 48/15 OMOKO GUNSO 340 360 380 390 400
Z 21 Feb 0100 UTC 21 Feb 0800 UTC SELIM 40/60 43/50 45/40 48/30 49/20 BEDRA NASBA 360 380 390 400
Warning: Do not use this data for real-world aviation or navigation. No guarantee of current accuracy is given.