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	23 Aug 1130 UTC	23 Aug 1900 UTC	BALIX 61/20 63/30 64/40 63/50 MAXAR		310 320 330 350 360 370
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
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
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
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
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
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
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
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	23 Aug 1130 UTC	23 Aug 1900 UTC	44/40 43/50 42/60 DOVEY		320 340 360 380
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
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	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
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
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
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
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
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
Z	23 Aug 0100 UTC	23 Aug 0800 UTC	SOORY 44/50 47/40 48/30 49/20 BEDRA NASBA	320 340 380 400
Z	24 Aug 0100 UTC	24 Aug 0800 UTC	SOORY 44/50 48/40 49/30 49/20 BEDRA NASBA	320 340 380 400

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	24 Aug 0700 UTC	24 Aug 2100 UTC	POWAL CHIKI 52N160W 52N150W 51N140W ORNAI
11	23 Aug 1000 UTC	23 Aug 2100 UTC	SEALS 36N150E 37N160E 36N170E 33N180E 29N170W DANNO
11	24 Aug 1000 UTC	24 Aug 2100 UTC	LEPKI 38N160E 37N170E 34N180E 30N170W FLYHM THOMA
14	23 Aug 0700 UTC	23 Aug 2100 UTC	LEPKI 39N160E 40N170E 42N180E 44N170W 46N160W 46N150W 45N140W 41N130W FATMO
2	24 Aug 0700 UTC	24 Aug 2100 UTC	ADGOR ASPIN LYYLE 50N180E 51N170W 51N160W 51N150W 49N140W 46N130W FULMR
2	23 Aug 0700 UTC	23 Aug 2100 UTC	EMRON 41N160E 43N170E 45N180E 47N170W 48N160W 48N150W 47N140W 44N130W LATNE
3	23 Aug 0700 UTC	23 Aug 2100 UTC	LEPKI 40N160E 41N170E 43N180E 45N170W 47N160W 47N150W 46N140W 42N130W VESPA
8	24 Aug 0700 UTC	24 Aug 2100 UTC	POWAL CHIKI 52N160W 52N150W 51N140W ORNAI
C	22 Aug 1900 UTC	23 Aug 0800 UTC	KATCH HMPTN GRIZZ CJAYY 57N160W 56N170W DRAPP SYA AAMYY ASPIN AKISU AGEDI ADGOR
E	23 Aug 1900 UTC	24 Aug 0800 UTC	ALCOA CEPAS COBAD 39N140W 39N150W 39N160W 40N170W 42N180E 41N170E 39N160E LEPKI
E	22 Aug 1900 UTC	23 Aug 0800 UTC	ALCOA BUTEN COBAD 38N140W 37N150W 36N160W 35N170W 35N180E 35N170E 36N160E LEPKI
E	24 Aug 1900 UTC	25 Aug 0800 UTC	ALCOA CEPAS COBAD 39N140W 40N150W 40N160W 41N170W 41N180E 39N170E 38N160E LEPKI
F	22 Aug 1900 UTC	23 Aug 0800 UTC	ALCOA BUTEN BOSKE 37N140W 36N150W 35N160W 34N170W 34N180E 34N170E 34N160E 35N150E SEALS
F	23 Aug 1900 UTC	24 Aug 0800 UTC	ALCOA BUTEN BOSKE 38N140W 38N150W 38N160W 39N170W 41N180E 40N170E 38N160E 36N150E SEALS
F	24 Aug 1900 UTC	25 Aug 0800 UTC	ALCOA BUTEN BOSKE 38N140W 39N150W 39N160W 40N170W 40N180E 38N170E 37N160E 36N150E SEALS
H	22 Aug 1900 UTC	23 Aug 0800 UTC	ALCOA BUTEN BOSKE 37N140W 36N150W 34N160W 33N170W 32N180E 31N170E 30N160E 30N150E 29N140E BIXAK
H	23 Aug 1900 UTC	24 Aug 0800 UTC	ALCOA BUTEN BOSKE 38N140W 37N150W 35N160W 34N170W 33N180E 32N170E 31N160E 30N150E 29N140E BIXAK
H	24 Aug 1900 UTC	25 Aug 0800 UTC	ALCOA BUTEN BOSKE 38N140W 39N150W 39N160W 39N170W 38N180E 34N170E 32N160E 30N150E 28N140E CANAI
I	24 Aug 1900 UTC	25 Aug 0800 UTC	AUDIA 36N130W 37N140W 38N150W 38N160W 37N170W 36N180E 34N170E 32N160E 30N150E 28N140E CANAI
J	23 Aug 0500 UTC	23 Aug 2100 UTC	ALCOA BUTEN BOSKE 38N140W 37N150W 35N160W 34N170W 33N180E 31N170E 30N160E 30N150E 29N140E BIXAK
J	24 Aug 0500 UTC	24 Aug 2100 UTC	ALCOA BUTEN BOSKE 38N140W 37N150W 36N160W 34N170W 33N180E 32N170E 30N160E 29N150E 28N140E CANAI
K	23 Aug 0500 UTC	23 Aug 2100 UTC	AUDIA 36N130W 36N140W 35N150W 34N160W 33N170W 32N180E 30N170E 29N160E 29N150E 28N140E CANAI
K	24 Aug 0500 UTC	24 Aug 2100 UTC	AUDIA 36N130W 37N140W 36N150W 35N160W 33N170W 32N180E 31N170E 29N160E 27N150E 23N140E TUNTO
M	22 Aug 1900 UTC	23 Aug 0800 UTC	KATCH HMPTN GRIZZ CJAYY 57N160W 56N170W DRAPP SYA AAMYY ASPIN AKISU AGEDI ADGOR
M	24 Aug 1900 UTC	25 Aug 0800 UTC	ALCOA CEPAS COBAD 39N140W 40N150W 40N160W 41N170W 41N180E 39N170E 38N160E LEPKI