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 table 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	17 Jul 1130 UTC	17 Jul 1900 UTC	ERAKA 60/20 61/30 61/40 60/50 URTAK		310 320 330 350 360 370
A	16 Jul 1130 UTC	16 Jul 1900 UTC	ERAKA 60/20 61/30 60/40 58/50 DORYY		310 320 330 340 350 360 370
B	17 Jul 1130 UTC	17 Jul 1900 UTC	GOMUP 59/20 60/30 60/40 59/50 AVUTI		310 320 330 350 360 370 380 390
B	16 Jul 1130 UTC	16 Jul 1900 UTC	GOMUP 59/20 60/30 59/40 57/50 HOIST		310 320 330 340 350 360 370 380 390
C	16 Jul 1130 UTC	16 Jul 1900 UTC	SUNOT 58/20 59/30 58/40 56/50 JANJO		310 320 330 340 350 360 370 380 390
C	17 Jul 1130 UTC	17 Jul 1900 UTC	SUNOT 58/20 59/30 59/40 58/50 CUDDY		310 320 330 340 350 360 370 380 390
E	17 Jul 1130 UTC	17 Jul 1900 UTC	RESNO 56/20 57/30 56/40 53/50 RIKAL		310 320 330 340 350 360 370 380 390
F	17 Jul 1130 UTC	17 Jul 1900 UTC	VENER 5530/20 5630/30 5530/40 5230/50 SAXAN		350 360 370 380 390
F	16 Jul 1130 UTC	16 Jul 1900 UTC	RESNO 56/20 57/30 56/40 54/50 NEEKO		310 320 330 340 350 360 370 380 390
G	17 Jul 1130 UTC	17 Jul 1900 UTC	DOGAL 55/20 56/30 55/40 52/50 TUDEP		310 320 330 340 350 360 370 380 390
G	16 Jul 1130 UTC	16 Jul 1900 UTC	DOGAL 55/20 56/30 55/40 53/50 RIKAL		310 320 330 340 350 360 370 380 390
H	17 Jul 1130 UTC	17 Jul 1900 UTC	MALOT 54/20 55/30 54/40 51/50 ALLRY		310 320 330 340 350 360 370 380 390
P	17 Jul 0100 UTC	17 Jul 0800 UTC	ALLRY 51/50 52/40 53/30 54/20 DOGAL BEXET	320 330 340 350 360 370 380 390 400
Q	17 Jul 0100 UTC	17 Jul 0800 UTC	ELSIR 50/50 51/40 52/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
R	17 Jul 0100 UTC	17 Jul 0800 UTC	JOOPY 49/50 50/40 51/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
S	17 Jul 0100 UTC	17 Jul 0800 UTC	MUSAK 4830/50 4930/40 5030/30 5130/20 ADARA LEKVA	350 360 370 380 390
T	17 Jul 0100 UTC	17 Jul 0800 UTC	NICSO 48/50 49/40 50/30 51/20 DINIM ELSOX	320 330 340 350 360 370 380 390 400
U	17 Jul 0100 UTC	17 Jul 0800 UTC	OMSAT 4730/50 4830/40 4930/30 5030/20 RODEL EPUNA	350 360 370 380 390
V	17 Jul 0100 UTC	17 Jul 0800 UTC	PORTI 47/50 48/40 49/30 50/20 SOMAX ATSUR	320 330 340 350 360 370 380 390 400
W	17 Jul 0100 UTC	17 Jul 0800 UTC	SUPRY 46/50 47/40 48/30 49/20 BEDRA NASBA	320 330 350 360 380 390 400
X	17 Jul 0100 UTC	17 Jul 0800 UTC	DOVEY 42/60 44/50 44/40	330 350 370 390
Y	17 Jul 0100 UTC	17 Jul 0800 UTC	43/50 46/40 47/30 48/20 48/15 OMOKO GUNSO	320 360 380 400
Z	17 Jul 0100 UTC	17 Jul 0800 UTC	40/50 45/40 46/30 47/20 47/15 ETIKI REGHI	320 360 380 400

Pacific Organised Track System (PACOTS) tracks are daily high altitude pacific routes between eastern Asia and the western coast of North-America. Eastward tracks are named numerically (1,2,3...). Similarly, westward tracks are named incrementally from the beginning of the alphabet (A,B,C...). Daily updates for each direction allow for routing around weather systems and tracking of favourable tailwinds to improve efficiency. The table below shows the current valid PACOTS tracks and the upcoming published PACOTS tracks.

Track	Valid From	Valid To	Route
1	17 Jul 0700 UTC	17 Jul 2100 UTC	EMRON 41N160E 44N170E 46N180E 49N170W 51N160W 51N150W 50N140W PRETY
11	16 Jul 1000 UTC	16 Jul 2100 UTC	FERAR 34N150E 35N160E 35N170E 32N180E 28N170W DANNO
14	17 Jul 0700 UTC	17 Jul 2100 UTC	DOVAG UKATA 33N150E 38N160E 40N170E 42N180E 44N170W 46N160W 47N150W 45N140W 41N130W FATMO
14	16 Jul 0700 UTC	16 Jul 2100 UTC	SEALS 36N150E 36N160E 36N170E 37N180E 36N170W 36N160W 36N150W 36N140W 38N130W ALLBE
2	17 Jul 0700 UTC	17 Jul 2100 UTC	LEPKI 40N160E 42N170E 45N180E 48N170W 50N160W 50N150W 48N140W 44N130W LATNE
2	16 Jul 0700 UTC	16 Jul 2100 UTC	EMRON 38N160E 38N170E 39N180E 38N170W 38N160W 38N150W 38N140W 40N130W SHENU
3	17 Jul 0700 UTC	17 Jul 2100 UTC	SEALS 36N150E 39N160E 41N170E 44N180E 47N170W 49N160W 49N150W 46N140W 42N130W VESPA
3	16 Jul 0700 UTC	16 Jul 2100 UTC	LEPKI 37N160E 37N170E 38N180E 37N170W 37N160W 37N150W 37N140W 39N130W DACEM
8	17 Jul 0700 UTC	17 Jul 2100 UTC	EMRON 41N160E 44N170E 46N180E 49N170W 51N160W 51N150W 50N140W PRETY
8	16 Jul 0700 UTC	16 Jul 2100 UTC	EMRON 38N160E 38N170E 39N180E 38N170W 38N160W 38N150W 38N140W 40N130W SHENU
A	17 Jul 1900 UTC	18 Jul 0800 UTC	DANNO ECEDO 27N170W 29N180E 30N170E 32N160E 35N150E SEALS
C	17 Jul 1900 UTC	18 Jul 0800 UTC	JOWEN LOHNE ARCAL 59N160W 58N170W POOFF OPAKE OLCOT OPHET OGDEN OMOTO
C	16 Jul 1900 UTC	17 Jul 0800 UTC	JOWEN LOHNE MDO 60N160W 58N170W OPAKE OLCOT OPHET OGDEN OMOTO
E	16 Jul 1900 UTC	17 Jul 0800 UTC	ALCOA CEPAS COBAD 39N140W 39N150W 39N160W 40N170W 42N180E 43N170E 42N160E EMRON
E	17 Jul 1900 UTC	18 Jul 0800 UTC	ALCOA BUTEN BOSKE 38N140W 39N150W 40N160W 41N170W 43N180E 43N170E 41N160E EMRON
F	17 Jul 1900 UTC	18 Jul 0800 UTC	ALCOA ALLBE ADTIL 35N140W 35N150W 34N160W 34N170W 34N180E 34N170E 34N160E 35N150E SEALS
F	16 Jul 1900 UTC	17 Jul 0800 UTC	ALCOA BUTEN BOSKE 37N140W 36N150W 35N160W 35N170W 35N180E 35N170E 35N160E 35N150E SEALS
H	17 Jul 1900 UTC	18 Jul 0800 UTC	ALCOA ALLBE ADTIL 35N140W 35N150W 34N160W 34N170W 33N180E 32N170E 31N160E 30N150E 29N140E BIXAK
H	16 Jul 1900 UTC	17 Jul 0800 UTC	ALCOA BUTEN BOSKE 36N140W 34N150W 33N160W 32N170W 31N180E 29N170E 28N160E 27N150E 27N140E CANAI
J	17 Jul 0500 UTC	17 Jul 2100 UTC	ALCOA CEPAS COBAD 37N140W 36N150W 35N160W 34N170W 33N180E 31N170E 30N160E 29N150E 28N140E BIXAK
J	16 Jul 0500 UTC	16 Jul 2100 UTC	ALCOA BUTEN BOSKE 36N140W 35N150W 34N160W 33N170W 32N180E 30N170E 29N160E 28N150E 27N140E CANAI
K	17 Jul 0500 UTC	17 Jul 2100 UTC	ALCOA BUTEN BOSKE 36N140W 35N150W 34N160W 33N170W 32N180E 30N170E 29N160E 28N150E 27N140E CANAI
K	16 Jul 0500 UTC	16 Jul 2100 UTC	AUDIA 35N130W 35N140W 34N150W 33N160W 32N170W 31N180E 29N170E 27N160E 26N150E 25N140E TUNTO
M	17 Jul 1900 UTC	18 Jul 0800 UTC	59N150W 59N160W 58N170W POOFF OPAKE OLCOT OPHET OGDEN OMOTO
M	16 Jul 1900 UTC	17 Jul 0800 UTC	MDO 60N160W 58N170W OPAKE OLCOT OPHET OGDEN OMOTO