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	24 Jan 1130 UTC	24 Jan 1900 UTC	DOGAL 55/20 57/30 57/40 56/50 JANJO		310 320 330 340 350 360 370 380 390
B	24 Jan 1130 UTC	24 Jan 1900 UTC	NEBIN 5430/20 5630/30 5630/40 5530/50 KODIK		350 360 370 380 390
C	24 Jan 1130 UTC	24 Jan 1900 UTC	MALOT 54/20 56/30 56/40 55/50 LOMSI		310 320 330 340 350 360 370 380 390
D	24 Jan 1130 UTC	24 Jan 1900 UTC	TOBOR 5330/20 5530/30 5530/40 5430/50 MELDI		350 360 370 380 390
E	24 Jan 1130 UTC	24 Jan 1900 UTC	LIMRI 53/20 55/30 55/40 54/50 NEEKO		310 320 330 340 350 360 370 380 390
P	25 Jan 0100 UTC	25 Jan 0800 UTC	ELSIR 50/50 52/40 54/30 55/20 RESNO NETKI	320 330 340 350 360 370 380 390 400
Q	25 Jan 0100 UTC	25 Jan 0800 UTC	JOOPY 49/50 51/40 53/30 54/20 DOGAL BEXET	320 330 340 350 360 370 380 390 400
R	25 Jan 0100 UTC	25 Jan 0800 UTC	MUSAK 4830/50 5030/40 5230/30 5330/20 NEBIN OLGON	350 360 370 380 390
S	25 Jan 0100 UTC	25 Jan 0800 UTC	NICSO 48/50 50/40 52/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
T	25 Jan 0100 UTC	25 Jan 0800 UTC	OMSAT 4730/50 4930/40 5130/30 5230/20 TOBOR RILED	350 360 370 380 390
U	24 Jan 0100 UTC	24 Jan 0800 UTC	TUDEP 52/50 55/40 57/30 57/20 SUNOT KESIX	320 330 340 350 360 370 380 390 400
U	25 Jan 0100 UTC	25 Jan 0800 UTC	PORTI 47/50 49/40 51/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
V	24 Jan 0100 UTC	24 Jan 0800 UTC	UMESI 5130/50 5430/40 5630/30 5630/20 BILTO BEGID	350 360 370 380 390
V	25 Jan 0100 UTC	25 Jan 0800 UTC	RELIC 4630/50 4830/40 5030/30 5130/20 ADARA LEKVA	350 360 370 380 390
W	24 Jan 0100 UTC	24 Jan 0800 UTC	ALLRY 51/50 54/40 56/30 56/20 PIKIL SOVED	320 330 340 350 360 370 380 390 400
W	25 Jan 0100 UTC	25 Jan 0800 UTC	SUPRY 46/50 48/40 50/30 51/20 DINIM ELSOX	320 330 340 350 360 370 380 390 400
X	24 Jan 0100 UTC	24 Jan 0800 UTC	ELSIR 50/50 53/40 55/30 55/20 RESNO NETKI	320 330 340 350 360 370 380 390 400
X	25 Jan 0100 UTC	25 Jan 0800 UTC	RAFIN 45/50 47/40 49/30 50/20 SOMAX ATSUR	320 330 340 350 360 370 380 390 400
Y	24 Jan 0100 UTC	24 Jan 0800 UTC	DOVEY 42/60 44/50 44/40	330 350 370
Y	25 Jan 0100 UTC	25 Jan 0800 UTC	DOVEY 42/60 44/50 46/40 48/30 49/20 BEDRA NASBA	320 330 340 350 360 370 380 390 400
Z	25 Jan 0100 UTC	25 Jan 0800 UTC	MUNEY 41/60 43/50 45/40 47/30 48/20 48/15 OMOKO GUNSO	320 330 340 350 360 370 380 390 400
Z	24 Jan 0100 UTC	24 Jan 0800 UTC	SOORY 42/50 46/40 50/30 52/20 LIMRI XETBO	320 340 360 380 400

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	25 Jan 0700 UTC	25 Jan 2100 UTC	EMRON 39N160E 40N170E 42N180E 44N170W 45N160W 46N150W 47N140W ROUKE
11	24 Jan 1000 UTC	24 Jan 2100 UTC	SEALS 35N150E 34N160E 32N170E 30N180E 27N170W DANNO
12	24 Jan 1000 UTC	24 Jan 2100 UTC	SEALS 35N150E 33N160E 31N170E 28N180E 25N170W SYVAD
14	25 Jan 0700 UTC	25 Jan 2100 UTC	DOVAG UKATA 33N150E 35N160E 35N170E 35N180E 36N170W 36N160W 36N150W 37N140W 38N130W ALLBE
14	24 Jan 0700 UTC	24 Jan 2100 UTC	DOVAG UKATA 33N150E 36N160E 37N170E 37N180E 37N170W 37N160W 37N150W 38N140W 38N130W ALLBE
15	25 Jan 0700 UTC	25 Jan 2100 UTC	DOVAG UKATA 33N150E 35N160E 35N170E 35N180E 36N170W 36N160W 35N150W 35N140W 35N130W GALIP
2	24 Jan 0700 UTC	24 Jan 2100 UTC	EMRON 39N160E 40N170E 41N180E 41N170W 41N160W 41N150W 41N140W 40N130W SHENU
2	25 Jan 0700 UTC	25 Jan 2100 UTC	LEPKI 37N160E 37N170E 37N180E 38N170W 38N160W 38N150W 39N140W 40N130W SHENU
3	24 Jan 0700 UTC	24 Jan 2100 UTC	LEPKI 38N160E 38N170E 38N180E 38N170W 38N160W 39N150W 40N140W 39N130W DACEM
3	25 Jan 0700 UTC	25 Jan 2100 UTC	SEALS 36N150E 36N160E 36N170E 36N180E 37N170W 37N160W 37N150W 38N140W 39N130W DACEM
8	24 Jan 0700 UTC	24 Jan 2100 UTC	EMRON 39N160E 40N170E 41N180E 41N170W 41N160W 41N150W 41N140W 40N130W SHENU
8	25 Jan 0700 UTC	25 Jan 2100 UTC	LEPKI 37N160E 37N170E 38N180E 39N170W 40N160W 40N150W 41N140W 42N130W LATNE FOT
C	23 Jan 1900 UTC	24 Jan 0800 UTC	MANJO 53N140W 54N150W 54N160W DRAPP NATES NIKLL NYMPH NUZAN NRKEY NIPPI
C	24 Jan 1900 UTC	25 Jan 0800 UTC	NUDGE 51N140W 52N150W 53N160W DRAPP NATES NIKLL NYMPH NUZAN NRKEY NIPPI
E	23 Jan 1900 UTC	24 Jan 0800 UTC	LINUZ NATTE ZANNG 49N140W 51N150W 52N160W CURVS OPAKE OLCOT OPHET OGDEN OMOTO
E	24 Jan 1900 UTC	25 Jan 0800 UTC	REDWD UNVER 42N130W 47N140W 49N150W 51N160W OPAKE OLCOT OPHET OGDEN OMOTO
F	24 Jan 1900 UTC	25 Jan 0800 UTC	ALCOA DACEM 40N130W 45N140W 48N150W 49N160W 50N170W 49N180E 47N170E 44N160E EMRON
F	23 Jan 1900 UTC	24 Jan 0800 UTC	REDWD EDWIL 47N140W 49N150W 49N160W 49N170W 49N180E 47N170E 44N160E EMRON
K	24 Jan 0500 UTC	24 Jan 2100 UTC	ORNAI 53N140W 56N150W 57N160W OGGOE NULUK NANDY NATES NIKLL NYMPH NUZAN NIPPI
M	23 Jan 1900 UTC	24 Jan 0800 UTC	MANJO 53N140W 54N150W 54N160W DRAPP NATES NIKLL NYMPH NUZAN NRKEY NIPPI
M	24 Jan 1900 UTC	25 Jan 0800 UTC	NUDGE 51N140W 52N150W 53N160W DRAPP NATES NIKLL NYMPH NUZAN NRKEY NIPPI