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	20 Mar 1130 UTC	20 Mar 1900 UTC	DOGAL 55/20 56/30 56/40 55/50 LOMSI		310 320 330 340 350 360 370 380 390
A	19 Mar 1130 UTC	19 Mar 1900 UTC	GOMUP 59/20 61/30 61/40 59/50 BOKTO		310 320 330 350 360 370 380 390
B	19 Mar 1130 UTC	19 Mar 1900 UTC	SUNOT 58/20 60/30 60/40 58/50 DORYY		310 320 330 340 350 360 370 380 390
B	20 Mar 1130 UTC	20 Mar 1900 UTC	MALOT 54/20 55/30 55/40 54/50 NEEKO		310 320 330 340 350 360 370 380 390
C	20 Mar 1130 UTC	20 Mar 1900 UTC	TOBOR 5330/20 5430/30 5430/40 5330/50 PELTU		350 360 370 380 390
D	20 Mar 1130 UTC	20 Mar 1900 UTC	LIMRI 53/20 54/30 54/40 53/50 RIKAL		310 320 330 340 350 360 370 380 390
D	19 Mar 1130 UTC	19 Mar 1900 UTC	DINIM 50/20 50/30 50/40 50/50 ELSIR		310 320 330 340 350 360 370 380 390
E	20 Mar 1130 UTC	20 Mar 1900 UTC	DINIM 52/20 53/30 53/40 52/50 TUDEP		310 320 330 340 350 360 370 380 390
E	19 Mar 1130 UTC	19 Mar 1900 UTC	SOMAX 49/20 49/30 49/40 49/50 JOOPY		310 320 330 340 350 360 370 380 390
F	20 Mar 1130 UTC	20 Mar 1900 UTC	SOMAX 51/20 52/30 52/40 51/50 ALLRY		310 320 330 340 350 360 370 380 390
F	19 Mar 1130 UTC	19 Mar 1900 UTC	BEDRA 48/20 48/30 48/40 48/50 NICSO		310 320 330 350 360 370 390
G	20 Mar 1130 UTC	20 Mar 1900 UTC	BEDRA 50/20 51/30 51/40 50/50 ELSIR		310 320 330 340 350 360 370 380 390
R	20 Mar 0100 UTC	20 Mar 0800 UTC	NICSO 48/50 51/40 54/30 57/20 SUNOT KESIX	320 330 340 350 360 370 380 390 400
S	20 Mar 0100 UTC	20 Mar 0800 UTC	PORTI 47/50 50/40 53/30 56/20 PIKIL SOVED	320 330 340 350 360 370 380 390 400
T	20 Mar 0100 UTC	20 Mar 0800 UTC	SUPRY 46/50 49/40 52/30 55/20 RESNO NETKI	320 330 340 350 360 370 380 390 400
U	20 Mar 0100 UTC	20 Mar 0800 UTC	RAFIN 45/50 48/40 51/30 54/20 DOGAL BEXET	320 330 340 350 360 370 380 390 400
V	20 Mar 0100 UTC	20 Mar 0800 UTC	DOVEY 42/60 44/50 47/40 50/30 53/20 MALOT GISTI	320 360 380 400
W	20 Mar 0100 UTC	20 Mar 0800 UTC	JOBOC 41/60 43/50 46/40 49/30 52/20 LIMRI XETBO	320 360 380 400
X	20 Mar 0100 UTC	20 Mar 0800 UTC	SLATN 39/60 41/50 43/40	330 350 370 390
Y	20 Mar 0100 UTC	20 Mar 0800 UTC	MUNEY 40/60 42/50 45/40 48/30 51/20 DINIM ELSOX	320 360 380 400
Z	20 Mar 0100 UTC	20 Mar 0800 UTC	40/50 44/40 47/30 50/20 SOMAX ATSUR	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	19 Mar 0700 UTC	19 Mar 2100 UTC	EMRON 39N160E 40N170E 41N180E 43N170W 44N160W 45N150W 47N140W ROUKE
1	20 Mar 0700 UTC	20 Mar 2100 UTC	EMRON 38N160E 39N170E 40N180E 41N170W 43N160W 45N150W 47N140W ROUKE
14	20 Mar 0700 UTC	20 Mar 2100 UTC	DOVAG 30N140E 32N150E 35N160E 36N170E 36N180E 36N170W 36N160W 37N150W 38N140W 38N130W ALLBE
14	19 Mar 0700 UTC	19 Mar 2100 UTC	DOVAG 29N140E 31N150E 34N160E 34N170E 35N180E 36N170W 36N160W 36N150W 36N140W 37N130W ALLBE
15	19 Mar 0700 UTC	19 Mar 2100 UTC	DOVAG 29N140E 31N150E 34N160E 34N170E 35N180E 36N170W 36N160W 35N150W 35N140W 34N130W GALIP
2	20 Mar 0700 UTC	20 Mar 2100 UTC	LEPKI 37N160E 38N170E 38N180E 38N170W 39N160W 40N150W 41N140W 40N130W SHENU
2	19 Mar 0700 UTC	19 Mar 2100 UTC	LEPKI 37N160E 37N170E 37N180E 38N170W 38N160W 38N150W 39N140W 40N130W SHENU
3	20 Mar 0700 UTC	20 Mar 2100 UTC	SEALS 36N150E 36N160E 37N170E 37N180E 37N170W 38N160W 39N150W 40N140W 39N130W DACEM
3	19 Mar 0700 UTC	19 Mar 2100 UTC	SEALS 36N150E 36N160E 36N170E 36N180E 37N170W 37N160W 37N150W 37N140W 38N130W DACEM
8	19 Mar 0700 UTC	19 Mar 2100 UTC	SEALS 36N150E 36N160E 36N170E 36N180E 37N170W 37N160W 37N150W 37N140W 38N130W DACEM
8	20 Mar 0700 UTC	20 Mar 2100 UTC	LEPKI 37N160E 38N170E 38N180E 38N170W 39N160W 40N150W 41N140W 40N130W SHENU ENI
A	20 Mar 1900 UTC	21 Mar 0800 UTC	NONNI BRIUN 22N170W 24N180E 28N170E 31N160E 34N150E SEALS
A	19 Mar 1900 UTC	20 Mar 0800 UTC	PUPPI CRESP 23N170W 25N180E 29N170E 33N160E 35N150E SEALS
C	20 Mar 1900 UTC	21 Mar 0800 UTC	KATCH HMPTN GRIZZ CJAYY 58N160W CHUUK OBOYD NATES NIKLL NYMPH NUZAN NRKEY NIPPI
C	19 Mar 1900 UTC	20 Mar 0800 UTC	MANJO 53N140W 54N150W 55N160W CAMBO POOFF NATES NIKLL NYMPH NUZAN NRKEY NIPPI
E	19 Mar 1900 UTC	20 Mar 0800 UTC	REDWD EDWIL 48N140W 51N150W 53N160W OPAKE OLCOT OPHET OGDEN OMOTO
F	19 Mar 1900 UTC	20 Mar 0800 UTC	REDWD TRYSH GAPNE 46N140W 49N150W 51N160W 50N170W 49N180E 47N170E 44N160E EMRON
F	20 Mar 1900 UTC	21 Mar 0800 UTC	LINUZ NATTE ZANNG 48N140W 49N150W 50N160W 50N170W 49N180E 47N170E 43N160E EMRON
J	20 Mar 0500 UTC	20 Mar 2100 UTC	LINUZ MITOH 43N130W 51N140W 55N150W 57N160W 58N170W NULUK NANDY NATES NIKLL NYMPH NUZAN NIPPI
K	20 Mar 0500 UTC	20 Mar 2100 UTC	REDWD TRYSH 41N130W 48N140W 51N150W 51N160W 50N170W 49N180E 47N170E 43N160E EMRON
K	19 Mar 0500 UTC	19 Mar 2100 UTC	ALCOA CEPAS COBAD 44N140W 47N150W 49N160W 49N170W 48N180E 46N170E 42N160E EMRON
M	20 Mar 1900 UTC	21 Mar 0800 UTC	KATCH HMPTN GRIZZ CJAYY 58N160W CHUUK OBOYD NATES NIKLL NYMPH NUZAN NRKEY NIPPI
M	19 Mar 1900 UTC	20 Mar 0800 UTC	MANJO 53N140W 54N150W 55N160W CAMBO POOFF NATES NIKLL NYMPH NUZAN NRKEY NIPPI