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	11 Dec 1130 UTC	11 Dec 1900 UTC	BALIX 61/20 63/30 63/40 62/50 PIDSO		310 320 330 350 360 370
A	10 Dec 1130 UTC	10 Dec 1900 UTC	ERAKA 60/20 62/30 63/40 63/50 MAXAR		310 320 330 350 360 370
B	11 Dec 1130 UTC	11 Dec 1900 UTC	ERAKA 60/20 62/30 62/40 61/50 SAVRY		310 320 330 350 360 370
B	10 Dec 1130 UTC	10 Dec 1900 UTC	GOMUP 59/20 61/30 62/40 62/50 PIDSO		310 320 330 350 360 370 380 390
C	10 Dec 1130 UTC	10 Dec 1900 UTC	SUNOT 58/20 60/30 61/40 61/50 SAVRY		310 320 330 350 360 370 380 390
C	11 Dec 1130 UTC	11 Dec 1900 UTC	GOMUP 59/20 61/30 61/40 60/50 URTAK		310 320 330 350 360 370 380 390
D	10 Dec 1130 UTC	10 Dec 1900 UTC	MALOT 53/20 52/30 49/40 46/50 SUPRY		310 320 330 350 360 370 390
D	11 Dec 1130 UTC	11 Dec 1900 UTC	DINIM 50/20 47/30 44/40 42/50 42/60 DOVEY		310 320 330 350 360 370 390
E	10 Dec 1130 UTC	10 Dec 1900 UTC	LIMRI 52/20 51/30 48/40 45/50 RAFIN		310 320 330 350 360 370 390
E	11 Dec 1130 UTC	11 Dec 1900 UTC	SOMAX 49/20 46/30 43/40 41/50 41/60 JOBOC		310 320 330 350 360 370 390
F	11 Dec 1130 UTC	11 Dec 1900 UTC	BEDRA 48/20 45/30 42/40 40/50 39/60		310 320 330 350 360 370 390
F	10 Dec 1130 UTC	10 Dec 1900 UTC	DINIM 51/20 50/30 47/40 44/50 42/60 DOVEY		310 320 330 350 360 370 390
G	11 Dec 1130 UTC	11 Dec 1900 UTC	38/40 35/50 33/60		320 340 360 380
G	10 Dec 1130 UTC	10 Dec 1900 UTC	SOMAX 50/20 49/30 46/40 43/50 41/60 JOBOC		310 320 330 350 360 370 390
H	10 Dec 1130 UTC	10 Dec 1900 UTC	45/40 41/50 35/60		320 340 360 380
J	10 Dec 1130 UTC	10 Dec 1900 UTC	43/40 39/50 33/60		320 340 360 380
R	10 Dec 0100 UTC	10 Dec 0800 UTC	RIKAL 53/50 54/40 55/30 55/20 RESNO NETKI	320 330 340 350 360 370 380 390 400
S	10 Dec 0100 UTC	10 Dec 0800 UTC	TUDEP 52/50 53/40 54/30 54/20 DOGAL BEXET	320 330 340 350 360 370 380 390 400
S	11 Dec 0100 UTC	11 Dec 0800 UTC	RIKAL 53/50 54/40 55/30 54/20 DOGAL BEXET	320 330 340 350 360 370 380 390 400
T	10 Dec 0100 UTC	10 Dec 0800 UTC	UMESI 5130/50 5230/40 5330/30 5330/20 NEBIN OLGON	350 360 370 380 390
T	11 Dec 0100 UTC	11 Dec 0800 UTC	TUDEP 52/50 53/40 54/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
U	10 Dec 0100 UTC	10 Dec 0800 UTC	ALLRY 51/50 52/40 53/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
U	11 Dec 0100 UTC	11 Dec 0800 UTC	UMESI 5130/50 5230/40 5330/30 5230/20 TOBOR RILED	350 360 370 380 390
V	10 Dec 0100 UTC	10 Dec 0800 UTC	BUDAR 5030/50 5130/40 5230/30 5230/20 TOBOR RILED	350 360 370 380 390
V	11 Dec 0100 UTC	11 Dec 0800 UTC	ALLRY 51/50 52/40 53/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
W	10 Dec 0100 UTC	10 Dec 0800 UTC	ELSIR 50/50 51/40 52/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
W	11 Dec 0100 UTC	11 Dec 0800 UTC	BUDAR 5030/50 5130/40 5230/30 5130/20 ADARA LEKVA	350 360 370 380 390
X	10 Dec 0100 UTC	10 Dec 0800 UTC	JOOPY 49/50 50/40 51/30 51/20 DINIM ELSOX	320 330 340 350 360 370 380 390 400
X	11 Dec 0100 UTC	11 Dec 0800 UTC	ELSIR 50/50 51/40 52/30 51/20 DINIM ELSOX	320 330 340 350 360 370 380 390 400
Y	10 Dec 0100 UTC	10 Dec 0800 UTC	NICSO 48/50 49/40 50/30 50/20 SOMAX ATSUR	320 330 340 350 360 370 380 390 400
Y	11 Dec 0100 UTC	11 Dec 0800 UTC	JOOPY 49/50 50/40 51/30 50/20 SOMAX ATSUR	320 330 340 350 360 370 380 390 400
Z	11 Dec 0100 UTC	11 Dec 0800 UTC	SOORY 44/50 48/40 50/30 49/20 BEDRA NASBA	320 360 380 400
Z	10 Dec 0100 UTC	10 Dec 0800 UTC	MUNEY 41/60 44/50 47/40 49/30 49/20 BEDRA NASBA	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	10 Dec 0700 UTC	10 Dec 2100 UTC	EMRON 39N160E 39N170E 39N180E 40N170W 41N160W 43N150W 46N140W ROUKE
11	11 Dec 1000 UTC	11 Dec 2100 UTC	SEALS 36N150E 35N160E 34N170E 31N180E 28N170W DANNO
14	10 Dec 0700 UTC	10 Dec 2100 UTC	SEALS 35N150E 35N160E 35N170E 36N180E 36N170W 37N160W 38N150W 38N140W 38N130W ALLBE
14	11 Dec 0700 UTC	11 Dec 2100 UTC	LEPKI 36N160E 36N170E 36N180E 36N170W 37N160W 38N150W 39N140W 38N130W ALLBE
15	10 Dec 0700 UTC	10 Dec 2100 UTC	SEALS 35N150E 35N160E 35N170E 36N180E 36N170W 37N160W 37N150W 37N140W 35N130W GALIP
2	10 Dec 0700 UTC	10 Dec 2100 UTC	LEPKI 37N160E 37N170E 38N180E 38N170W 39N160W 40N150W 40N140W 40N130W SHENU
2	11 Dec 0700 UTC	11 Dec 2100 UTC	EMRON 40N160E 41N170E 41N180E 41N170W 41N160W 41N150W 41N140W 40N130W SHENU
3	11 Dec 0700 UTC	11 Dec 2100 UTC	LEPKI 37N160E 37N170E 37N180E 37N170W 38N160W 39N150W 40N140W 39N130W DACEM
3	10 Dec 0700 UTC	10 Dec 2100 UTC	SEALS 36N150E 36N160E 36N170E 37N180E 37N170W 38N160W 39N150W 39N140W 39N130W DACEM
8	10 Dec 0700 UTC	10 Dec 2100 UTC	LEPKI 37N160E 37N170E 38N180E 38N170W 39N160W 40N150W 40N140W 40N130W SHENU
8	11 Dec 0700 UTC	11 Dec 2100 UTC	EMRON 40N160E 41N170E 41N180E 41N170W 41N160W 42N150W 42N140W 42N130W LATNE FOT
C	09 Dec 1900 UTC	10 Dec 0800 UTC	KATCH HMPTN GRIZZ CJAYY 59N160W SELDM NATES NIKLL NYMPH NUZAN NRKEY NIPPI
C	11 Dec 1900 UTC	12 Dec 0800 UTC	KATCH HMPTN GRIZZ CJAYY 58N160W OGGOE NANDY NATES NIKLL NYMPH NUZAN NRKEY NIPPI
C	10 Dec 1900 UTC	11 Dec 0800 UTC	JOWEN LOHNE ARCAL 59N160W SELDM NATES NIKLL NYMPH NUZAN NRKEY NIPPI
E	09 Dec 1900 UTC	10 Dec 0800 UTC	LINUZ NATTE ZANNG 51N140W 55N150W CUDDA ALUFF POOFF OPAKE OLCOT OPHET OGDEN OMOTO
E	10 Dec 1900 UTC	11 Dec 0800 UTC	LINUZ NATTE ZANNG 49N140W 52N150W 54N160W CRYPT ALDOZ OPAKE OLCOT OPHET OGDEN OMOTO
F	10 Dec 1900 UTC	11 Dec 0800 UTC	LINUZ MITOH EDWIL 47N140W 50N150W 50N160W 50N170W 49N180E 47N170E 43N160E EMRON
F	09 Dec 1900 UTC	10 Dec 0800 UTC	REDWD UNVER 42N130W 48N140W 51N150W 52N160W 50N170W 49N180E 47N170E 44N160E EMRON
F	11 Dec 1900 UTC	12 Dec 0800 UTC	LINUZ NATTE ZANNG 50N140W 52N150W 52N160W 50N170W 49N180E 46N170E 43N160E EMRON
H	11 Dec 1900 UTC	12 Dec 0800 UTC	REDWD UNVER 42N130W 48N140W 49N150W 49N160W 47N170W 42N180E 35N170E 29N160E 25N150E 23N140E TUNTO
J	11 Dec 0500 UTC	11 Dec 2100 UTC	REDWD VESPA 43N130W 51N140W 55N150W 57N160W ONEOX NULUK NANDY NATES NIKLL NYMPH NUZAN NIPPI
K	11 Dec 0500 UTC	11 Dec 2100 UTC	DINTY DUETS DADIE DIALO CIVIT AUNTI DOGIF 22N170W 21N180E 21N170E 22N160E 22N150E 22N140E TUNTO
M	11 Dec 1900 UTC	12 Dec 0800 UTC	59N150W 59N160W OGGOE NANDY NATES NIKLL NYMPH NUZAN NRKEY NIPPI
M	09 Dec 1900 UTC	10 Dec 0800 UTC	KATCH HMPTN GRIZZ CJAYY 59N160W SELDM NATES NIKLL NYMPH NUZAN NRKEY NIPPI
M	10 Dec 1900 UTC	11 Dec 0800 UTC	60N150W 60N160W OGGOE NATES NIKLL NYMPH NUZAN NRKEY NIPPI