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	14 May 1130 UTC	14 May 1900 UTC	GOMUP 59/20 60/30 60/40 59/50 AVUTI		350 360 370 380 390
A	15 May 1130 UTC	15 May 1900 UTC	GOMUP 59/20 61/30 62/40 61/50 SAVRY		350 360 370 380 390
B	14 May 1130 UTC	14 May 1900 UTC	SUNOT 58/20 59/30 59/40 58/50 CUDDY		340 350 360 370 380 390
B	15 May 1130 UTC	15 May 1900 UTC	SUNOT 58/20 60/30 61/40 60/50 URTAK		350 360 370 380 390
C	15 May 1130 UTC	15 May 1900 UTC	MALOT 52/20 50/30 49/40 48/50 NICSO		350 360 370 390
C	14 May 1130 UTC	14 May 1900 UTC	LIMRI 52/20 51/30 50/40 48/50 NICSO		350 360 370 390
D	15 May 1130 UTC	15 May 1900 UTC	LIMRI 51/20 49/30 48/40 47/50 PORTI		350 360 370 390
D	14 May 1130 UTC	14 May 1900 UTC	DINIM 51/20 50/30 49/40 47/50 PORTI		350 360 370 390
E	14 May 1130 UTC	14 May 1900 UTC	SOMAX 50/20 49/30 48/40 46/50 SUPRY		350 360 370 390
E	15 May 1130 UTC	15 May 1900 UTC	DINIM 50/20 48/30 47/40 46/50 SUPRY		350 360 370 390
F	14 May 1130 UTC	14 May 1900 UTC	BEDRA 49/20 48/30 47/40 45/50 RAFIN		350 360 370 390
F	15 May 1130 UTC	15 May 1900 UTC	SOMAX 49/20 47/30 46/40 45/50 RAFIN		350 360 370 390
G	14 May 1130 UTC	14 May 1900 UTC	ETIKI 48/15 48/20 47/30 46/40 44/50 BOBTU JAROM		350 360 370 390
G	15 May 1130 UTC	15 May 1900 UTC	BEDRA 48/20 46/30 45/40 44/50 BOBTU JAROM		350 360 370 390
U	14 May 0100 UTC	14 May 0800 UTC	RIKAL 53/50 55/40 55/30 55/20 DOGAL BEXET	340 350 360 370 380 390 400
U	15 May 0100 UTC	15 May 0800 UTC	LOMSI 55/50 56/40 57/30 56/20 RESNO NETKI	340 350 360 370 380 390 400
V	14 May 0100 UTC	14 May 0800 UTC	TUDEP 52/50 54/40 54/30 54/20 MALOT GISTI	340 350 360 370 380 390 400
V	15 May 0100 UTC	15 May 0800 UTC	NEEKO 54/50 55/40 56/30 55/20 DOGAL BEXET	340 350 360 370 380 390 400
W	14 May 0100 UTC	14 May 0800 UTC	ALLRY 51/50 53/40 53/30 53/20 LIMRI XETBO	340 350 360 370 380 390 400
W	15 May 0100 UTC	15 May 0800 UTC	PELTU 5330/50 5430/40 5530/30 5430/20 NEBIN OLGON	350 360 370 380 390
X	14 May 0100 UTC	14 May 0800 UTC	ELSIR 50/50 52/40 52/30 52/20 DINIM ELSOX	340 350 360 370 380 390 400
X	15 May 0100 UTC	15 May 0800 UTC	RIKAL 53/50 54/40 55/30 54/20 MALOT GISTI	340 350 360 370 380 390 400
Y	14 May 0100 UTC	14 May 0800 UTC	SUPRY 46/50 48/40 49/30 49/20 BEDRA NASBA	350 360 380 390 400
Y	15 May 0100 UTC	15 May 0800 UTC	TUDEP 52/50 53/40 54/30 53/20 LIMRI XETBO	340 350 360 370 380 390 400
Z	14 May 0100 UTC	14 May 0800 UTC	RAFIN 45/50 47/40 48/30 48/20 48/15 OMOKO GUNSO	350 360 380 390 400
Z	15 May 0100 UTC	15 May 0800 UTC	ALLRY 51/50 52/40 53/30 52/20 DINIM ELSOX	340 350 360 370 380 390 400