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 Nov 1130 UTC	17 Nov 1900 UTC	GOMUP 59/20 60/30 60/40 58/50 DORYY		310 320 330 340 350 360 370 380 390
A	16 Nov 1130 UTC	16 Nov 1900 UTC	ERAKA 60/20 62/30 63/40 63/50 KETLA		310 320 330 350 360 370
B	17 Nov 1130 UTC	17 Nov 1900 UTC	58/20 59/30 59/40 57/50 HOIST		310 320 330 340 350 360 370 380 390
B	16 Nov 1130 UTC	16 Nov 1900 UTC	GOMUP 59/20 61/30 61/40 60/50 URTAK		310 320 330 350 360 370 380 390
C	16 Nov 1130 UTC	16 Nov 1900 UTC	58/20 60/30 60/40 59/50 AVUTI		310 320 330 350 360 370 380 390
D	16 Nov 1130 UTC	16 Nov 1900 UTC	5730/20 5930/30 5930/40 5830/50 BOKTO		350 360 370 380 390
D	17 Nov 1130 UTC	17 Nov 1900 UTC	56/20 57/30 57/40 55/50 LOMSI		310 320 330 340 350 360 370 380 390
E	17 Nov 1130 UTC	17 Nov 1900 UTC	55/20 56/30 56/40 54/50 NEEKO		310 320 330 340 350 360 370 380 390
F	16 Nov 1130 UTC	16 Nov 1900 UTC	56/20 58/30 58/40 57/50 HOIST		310 320 330 340 350 360 370 380 390
G	16 Nov 1130 UTC	16 Nov 1900 UTC	55/20 57/30 57/40 56/50 JANJO		310 320 330 340 350 360 370 380 390
H	16 Nov 1130 UTC	16 Nov 1900 UTC	MALOT 54/20 56/30 56/40 55/50 LOMSI		310 320 330 340 350 360 370 380 390
Q	16 Nov 0100 UTC	16 Nov 0800 UTC	JOOPY 49/50 50/40 52/30 54/20 BEXET	320 330 340 350 360 370 380 390 400
R	16 Nov 0100 UTC	16 Nov 0800 UTC	NICSO 48/50 49/40 51/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
S	16 Nov 0100 UTC	16 Nov 0800 UTC	PORTI 47/50 48/40 50/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
T	16 Nov 0100 UTC	16 Nov 0800 UTC	RELIC 4630/50 4730/40 4930/30 5130/20 ADARA LEKVA	350 360 370 380 390
T	17 Nov 0100 UTC	17 Nov 0800 UTC	ELSIR 50/50 51/40 52/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
U	17 Nov 0100 UTC	17 Nov 0800 UTC	JOOPY 49/50 50/40 51/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
U	16 Nov 0100 UTC	16 Nov 0800 UTC	SUPRY 46/50 47/40 49/30 51/20	320 330 340 350 360 370 380 390 400
V	17 Nov 0100 UTC	17 Nov 0800 UTC	MUSAK 4830/50 4930/40 5030/30 5130/20 ADARA LEKVA	350 360 370 380 390
V	16 Nov 0100 UTC	16 Nov 0800 UTC	RAFIN 45/50 46/40 48/30 50/20	320 330 340 350 360 370 380 390 400
W	16 Nov 0100 UTC	16 Nov 0800 UTC	DOVEY 42/60 44/50 45/40 47/30 49/20	320 330 350 360 380 390 400
W	17 Nov 0100 UTC	17 Nov 0800 UTC	NICSO 48/50 49/40 50/30 51/20	320 330 340 350 360 370 380 390 400
X	16 Nov 0100 UTC	16 Nov 0800 UTC	JOBOC 41/60 41/50 41/40	350 370
X	17 Nov 0100 UTC	17 Nov 0800 UTC	PORTI 47/50 48/40 49/30 50/20	320 330 340 350 360 370 380 390 400
Y	16 Nov 0100 UTC	16 Nov 0800 UTC	MUNEY 40/60 43/50 44/40 46/30 48/20 48/15 OMOKO	320 330 360 380 390 400
Y	17 Nov 0100 UTC	17 Nov 0800 UTC	SUPRY 46/50 47/40 48/30 49/20	320 330 350 360 380 390 400
Z	17 Nov 0100 UTC	17 Nov 0800 UTC	MUNEY 41/60 44/50 46/40 47/30 48/20 48/15 OMOKO	320 360 380 400
Z	16 Nov 0100 UTC	16 Nov 0800 UTC	SOORY 42/50 43/40 45/30 47/20 47/15 ETIKI REGHI	320 330 360 380 390 400

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
11	17 Nov 1000 UTC	17 Nov 2100 UTC	SEALS 35N150E 33N160E 31N170E 29N180E 26N170W CANON
11	16 Nov 1000 UTC	16 Nov 2100 UTC	SEALS 35N150E 34N160E 33N170E 30N180E 26N170W CANON
14	17 Nov 0700 UTC	17 Nov 2100 UTC	LEPKI 39N160E 40N170E 41N180E 41N170W 42N160W 41N150W 40N140W 38N130W ALLBE
14	16 Nov 0700 UTC	16 Nov 2100 UTC	LEPKI 38N160E 40N170E 42N180E 43N170W 43N160W 41N150W 40N140W 38N130W ALLBE
2	17 Nov 0700 UTC	17 Nov 2100 UTC	EMRON 41N160E 43N170E 43N180E 43N170W 44N160W 44N150W 43N140W 41N130W TRYSH
2	16 Nov 0700 UTC	16 Nov 2100 UTC	EMRON 40N160E 42N170E 44N180E 45N170W 45N160W 44N150W 43N140W 41N130W TRYSH
3	17 Nov 0700 UTC	17 Nov 2100 UTC	LEPKI 40N160E 41N170E 42N180E 42N170W 43N160W 42N150W 41N140W 39N130W DACEM
3	16 Nov 0700 UTC	16 Nov 2100 UTC	LEPKI 39N160E 41N170E 43N180E 44N170W 44N160W 42N150W 41N140W 39N130W DACEM
8	17 Nov 0700 UTC	17 Nov 2100 UTC	EMRON 41N160E 43N170E 43N180E 43N170W 44N160W 44N150W 43N140W 41N130W TRYSH FOT
A	15 Nov 1900 UTC	16 Nov 0800 UTC	PUPPI DOGIF 26N170W 29N180E 31N170E 34N160E 35N150E SEALS
A	16 Nov 1900 UTC	17 Nov 0800 UTC	PUPPI DOGIF 26N170W 29N180E 32N170E 34N160E 35N150E SEALS
C	15 Nov 1900 UTC	16 Nov 0800 UTC	MANJO 53N140W 55N150W 57N160W 58N170W 57N180E NATES NIKLL NYMPH NUZAN NRKEY NIPPI
C	16 Nov 1900 UTC	17 Nov 0800 UTC	MANJO 53N140W 56N150W 57N160W 57N170W 57N180E NATES NIKLL NYMPH NUZAN NRKEY NIPPI
E	16 Nov 1900 UTC	17 Nov 0800 UTC	LINUZ NATTE ZANNG 49N140W 54N150W 56N160W 56N170W POOFF OPAKE OLCOT OPHET OGDEN OMOTO
E	15 Nov 1900 UTC	16 Nov 0800 UTC	LINUZ MITOH EDWIL 47N140W 52N150W 55N160W 56N170W ALDOZ OPAKE OLCOT OPHET OGDEN OMOTO
F	16 Nov 1900 UTC	17 Nov 0800 UTC	REDWD UNVER 42N130W 46N140W 49N150W 49N160W 50N170W 49N180E 47N170E 43N160E EMRON
F	15 Nov 1900 UTC	16 Nov 0800 UTC	REDWD UNVER 42N130W 45N140W 48N150W 49N160W 48N170W 48N180E 47N170E 44N160E EMRON
J	16 Nov 0500 UTC	16 Nov 2100 UTC	LINUZ MITOH 43N130W 49N140W 54N150W 57N160W OGGOE OFORD OBOYD ONEIL OPAKE OLCOT OPHET OGDEN OMOTO
J	17 Nov 0500 UTC	17 Nov 2100 UTC	REDWD UNVER 42N130W 48N140W 53N150W 56N160W ONEOX NULUK NANDY NATES NIKLL NYMPH NUZAN NIPPI
K	17 Nov 0500 UTC	17 Nov 2100 UTC	ALCOA DACEM 40N130W 46N140W 51N150W 54N160W PUGGY OGGOE OFORD OBOYD ONEIL OPAKE OLCOT OPHET OGDEN OMOTO
M	16 Nov 1900 UTC	17 Nov 0800 UTC	LINUZ NATTE ZANNG 49N140W 54N150W 56N160W 56N170W POOFF OPAKE OLCOT OPHET OGDEN OMOTO
M	15 Nov 1900 UTC	16 Nov 0800 UTC	LINUZ MITOH EDWIL 47N140W 52N150W 55N160W 56N170W ALDOZ OPAKE OLCOT OPHET OGDEN OMOTO