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 May 1130 UTC	24 May 1900 UTC	RESNO 55/20 57/30 58/40 58/50 DORYY		310 320 330 340 350 360 370 380 390
B	25 May 1130 UTC	25 May 1900 UTC	RESNO 56/20 57/30 57/40 55/50 LOMSI		310 320 330 340 350 360 370 380 390
B	24 May 1130 UTC	24 May 1900 UTC	DOGAL 54/20 56/30 57/40 57/50 HOIST		310 320 330 340 350 360 370 380 390
C	25 May 1130 UTC	25 May 1900 UTC	VENER 5530/20 5630/30 5630/40 5430/50 MELDI		350 360 370 380 390
C	24 May 1130 UTC	24 May 1900 UTC	MALOT 53/20 55/30 56/40 56/50 JANJO		310 320 330 340 350 360 370 380 390
D	25 May 1130 UTC	25 May 1900 UTC	DOGAL 55/20 56/30 56/40 54/50 NEEKO		310 320 330 340 350 360 370 380 390
D	24 May 1130 UTC	24 May 1900 UTC	TOBOR 5230/20 5430/30 5530/40 5530/50 KODIK		350 360 370 380 390
E	24 May 1130 UTC	24 May 1900 UTC	LIMRI 52/20 54/30 55/40 55/50 LOMSI		310 320 330 340 350 360 370 380 390
E	25 May 1130 UTC	25 May 1900 UTC	MALOT 54/20 55/30 55/40 53/50 RIKAL		310 320 330 340 350 360 370 380 390
F	24 May 1130 UTC	24 May 1900 UTC	DINIM 51/20 53/30 54/40 54/50 NEEKO		310 320 330 340 350 360 370 380 390
G	24 May 1130 UTC	24 May 1900 UTC	SOMAX 50/20 52/30 53/40 53/50 RIKAL		310 320 330 340 350 360 370 380 390
H	24 May 1130 UTC	24 May 1900 UTC	BEDRA 49/20 51/30 52/40 52/50 TUDEP		310 320 330 340 350 360 370 380 390
J	24 May 1130 UTC	24 May 1900 UTC	ETIKI 48/15 48/20 50/30 51/40 51/50 ALLRY		310 320 330 350 360 370 390
N	25 May 0100 UTC	25 May 0800 UTC	URTAK 60/50 61/40 61/30 60/20 BALIX NINEX	320 340 360 380 400
P	25 May 0100 UTC	25 May 0800 UTC	AVUTI 59/50 60/40 60/30 59/20 ERAKA ETSOM	320 340 360 380 400
Q	25 May 0100 UTC	25 May 0800 UTC	JOOPY 49/50 51/40 53/30 56/20 PIKIL SOVED	320 330 340 350 360 370 380 390 400
R	25 May 0100 UTC	25 May 0800 UTC	NICSO 48/50 50/40 52/30 55/20 RESNO NETKI	320 330 340 350 360 370 380 390 400
S	25 May 0100 UTC	25 May 0800 UTC	PORTI 47/50 49/40 51/30 54/20 DOGAL BEXET	320 330 340 350 360 370 380 390 400
T	25 May 0100 UTC	25 May 0800 UTC	SUPRY 46/50 48/40 50/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
U	25 May 0100 UTC	25 May 0800 UTC	RAFIN 45/50 47/40 49/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
V	25 May 0100 UTC	25 May 0800 UTC	DOVEY 42/60 44/50 46/40 48/30 51/20 DINIM ELSOX	320 340 360 380 400
W	25 May 0100 UTC	25 May 0800 UTC	JOBOC 41/60 42/50 43/40	340 370
X	25 May 0100 UTC	25 May 0800 UTC	SOORY 43/50 45/40 47/30 50/20 SOMAX ATSUR	320 360 380 400
Y	25 May 0100 UTC	25 May 0800 UTC	36/60 41/50 44/40 46/30 49/20 BEDRA NASBA	320 360 380 400
Z	25 May 0100 UTC	25 May 0800 UTC	37/50 42/40 45/30 48/20 48/15 OMOKO GUNSO	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	25 May 0700 UTC	25 May 2100 UTC	EMRON 42N160E 46N170E 49N180E 50N170W 51N160W 52N150W 52N140W NUDGE
11	24 May 1000 UTC	24 May 2100 UTC	LEPKI 39N160E 38N170E 34N180E 30N170W THOMA
14	25 May 0700 UTC	25 May 2100 UTC	CANAI 29N140E NOGAK 34N150E 39N160E 43N170E 45N180E 45N170W 44N160W 45N150W 45N140W 42N130W VESPA
15	25 May 0700 UTC	25 May 2100 UTC	CANAI 29N140E NOGAK 34N150E 39N160E 43N170E 45N180E 45N170W 44N160W 45N150W 44N140W 41N130W FATMO
2	24 May 0700 UTC	24 May 2100 UTC	ADGOR ASPIN LYYLE 50N180E 51N170W 51N160W 51N150W 49N140W 44N130W LATNE
2	25 May 0700 UTC	25 May 2100 UTC	LEPKI 41N160E 45N170E 47N180E 48N170W 48N160W 49N150W 48N140W 45N130W ENDAW
8	24 May 0700 UTC	24 May 2100 UTC	PASRO POWAL CHIKI 53N160W 53N150W 52N140W NUDGE
8	25 May 0700 UTC	25 May 2100 UTC	LEPKI 41N160E 45N170E 47N180E 48N170W 48N160W 49N150W 48N140W 45N130W ENDAW
C	25 May 1900 UTC	26 May 0800 UTC	MANJO 53N140W 55N150W 57N160W 57N170W POOFF OPAKE OLCOT OPHET OGDEN OMOTO
C	24 May 1900 UTC	25 May 0800 UTC	NUDGE 51N140W 52N150W 54N160W 55N170W DRAPP AMOND OPAKE OLCOT OPHET OGDEN OMOTO
E	25 May 1900 UTC	26 May 0800 UTC	ALCOA CEPAS COBAD 42N140W 46N150W 50N160W 50N170W 49N180E 47N170E 44N160E EMRON
E	24 May 1900 UTC	25 May 0800 UTC	ALCOA CEPAS COBAD 40N140W 43N150W 46N160W 46N170W 43N180E 39N170E 37N160E LEPKI
F	24 May 1900 UTC	25 May 0800 UTC	ALCOA BUTEN BOSKE 39N140W 41N150W 44N160W 44N170W 41N180E 38N170E 36N160E 35N150E SEALS
F	25 May 1900 UTC	26 May 0800 UTC	ALCOA BUTEN BOSKE 41N140W 44N150W 48N160W 49N170W 48N180E 46N170E 41N160E 36N150E SEALS
J	24 May 0500 UTC	24 May 2100 UTC	ALCOA CEPAS COBAD 40N140W 41N150W 43N160W 45N170W 44N180E 41N170E 39N160E EMRON
J	25 May 0500 UTC	25 May 2100 UTC	REDWD TRYSH 41N130W 46N140W 52N150W 56N160W ONEOX NULUK NANDY NATES NIKLL NYMPH NUZAN NIPPI
K	24 May 0500 UTC	24 May 2100 UTC	AUDIA 36N130W 38N140W 40N150W 42N160W 44N170W 43N180E 40N170E 38N160E LEPKI
M	25 May 1900 UTC	26 May 0800 UTC	MANJO 53N140W 55N150W 57N160W 57N170W POOFF OPAKE OLCOT OPHET OGDEN OMOTO
M	24 May 1900 UTC	25 May 0800 UTC	61N150W 61N160W NOLTI NAYLD NULUK NANDY NATES NIKLL NYMPH NUZAN NRKEY NIPPI