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	15 Oct 1130 UTC	15 Oct 1900 UTC	ATSIX 61/20 62/30 61/40 59/50 AVUTI		310 320 330 350 360 370
A	14 Oct 1130 UTC	14 Oct 1900 UTC	BALIX 61/20 63/30 63/40 61/50 SAVRY		310 320 330 350 360 370
B	15 Oct 1130 UTC	15 Oct 1900 UTC	BALIX 60/20 61/30 60/40 58/50 DORYY		310 320 330 340 350 360 370
B	14 Oct 1130 UTC	14 Oct 1900 UTC	ERAKA 60/20 62/30 62/40 60/50 URTAK		310 320 330 350 360 370
C	14 Oct 1130 UTC	14 Oct 1900 UTC	GOMUP 59/20 61/30 60/40 58/50 CUDDY		310 320 330 340 350 360 370 380 390
C	15 Oct 1130 UTC	15 Oct 1900 UTC	SUNOT 58/20 59/30 59/40 57/50 HOIST		310 320 330 340 350 360 370 380 390
D	15 Oct 1130 UTC	15 Oct 1900 UTC	BILTO 5730/20 5830/30 5830/40 5630/50 IRLOK		350 360 370 380 390
D	14 Oct 1130 UTC	14 Oct 1900 UTC	SUNOT 58/20 60/30 59/40 57/50 HOIST		310 320 330 340 350 360 370 380 390
E	14 Oct 1130 UTC	14 Oct 1900 UTC	BILTO 5730/20 5930/30 5830/40 5630/50 IRLOK		350 360 370 380 390
F	15 Oct 1130 UTC	15 Oct 1900 UTC	RESNO 56/20 57/30 57/40 55/50 LOMSI		310 320 330 340 350 360 370 380 390
S	14 Oct 0100 UTC	14 Oct 0800 UTC	TUDEP 52/50 54/40 55/30 55/20 RESNO NETKI	320 330 340 350 360 370 380 390 400
S	15 Oct 0100 UTC	15 Oct 0800 UTC	TUDEP 52/50 53/40 54/30 55/20 RESNO NETKI	320 330 340 350 360 370 380 390 400
T	14 Oct 0100 UTC	14 Oct 0800 UTC	ALLRY 51/50 53/40 54/30 54/20 DOGAL BEXET	320 330 340 350 360 370 380 390 400
T	15 Oct 0100 UTC	15 Oct 0800 UTC	ALLRY 51/50 52/40 53/30 54/20 DOGAL BEXET	320 330 340 350 360 370 380 390 400
U	14 Oct 0100 UTC	14 Oct 0800 UTC	ELSIR 50/50 52/40 53/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
U	15 Oct 0100 UTC	15 Oct 0800 UTC	BUDAR 5030/50 5130/40 5230/30 5330/20 NEBIN OLGON	350 360 370 380 390
V	15 Oct 0100 UTC	15 Oct 0800 UTC	ELSIR 50/50 51/40 52/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
V	14 Oct 0100 UTC	14 Oct 0800 UTC	JOOPY 49/50 51/40 52/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
W	15 Oct 0100 UTC	15 Oct 0800 UTC	IBERG 4930/50 5030/40 5130/30 5230/20 TOBOR RILED	350 360 370 380 390
W	14 Oct 0100 UTC	14 Oct 0800 UTC	NICSO 48/50 50/40 51/30 51/20 DINIM ELSOX	320 330 340 350 360 370 380 390 400
X	15 Oct 0100 UTC	15 Oct 0800 UTC	JOOPY 49/50 50/40 51/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
X	14 Oct 0100 UTC	14 Oct 0800 UTC	PORTI 47/50 49/40 50/30 50/20 SOMAX ATSUR	320 330 340 350 360 370 380 390 400
Y	15 Oct 0100 UTC	15 Oct 0800 UTC	NICSO 48/50 49/40 50/30 51/20 DINIM ELSOX	320 330 340 350 360 370 380 390 400
Y	14 Oct 0100 UTC	14 Oct 0800 UTC	DOVEY 42/60 44/50 48/40 49/30 49/20 BEDRA NASBA	320 360 380 400
Z	15 Oct 0100 UTC	15 Oct 0800 UTC	PORTI 47/50 48/40 49/30 50/20 SOMAX ATSUR	320 330 340 350 360 370 380 390 400
Z	14 Oct 0100 UTC	14 Oct 0800 UTC	SOORY 43/50 46/40 48/30 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	14 Oct 0700 UTC	14 Oct 2100 UTC	POWAL CHIKI 52N160W 51N150W 50N140W PRETY
1	15 Oct 0700 UTC	15 Oct 2100 UTC	POWAL CHIKI 51N170W 50N160W 49N150W 49N140W PRETY
11	14 Oct 1000 UTC	14 Oct 2100 UTC	LEPKI 39N160E 38N170E 34N180E 30N170W FLYHM THOMA
11	15 Oct 1000 UTC	15 Oct 2100 UTC	LEPKI 39N160E 39N170E 36N180E 32N170W GENCO THOMA
14	14 Oct 0700 UTC	14 Oct 2100 UTC	EMRON 43N160E 46N170E 47N180E 47N170W 45N160W 43N150W 42N140W 38N130W ALLBE
14	15 Oct 0700 UTC	15 Oct 2100 UTC	EMRON 43N160E 46N170E 48N180E 48N170W 47N160W 45N150W 42N140W 38N130W ALLBE
3	14 Oct 0700 UTC	14 Oct 2100 UTC	EMRON 44N160E 47N170E 48N180E 48N170W 46N160W 44N150W 43N140W 40N130W DACEM
3	15 Oct 0700 UTC	15 Oct 2100 UTC	EMRON 44N160E 47N170E 49N180E 49N170W 48N160W 46N150W 44N140W 40N130W DACEM
8	15 Oct 0700 UTC	15 Oct 2100 UTC	POWAL CHIKI 51N170W 50N160W 49N150W 49N140W PRETY
A	14 Oct 1900 UTC	15 Oct 0800 UTC	LILIA DOGIF 25N170W 29N180E 31N170E 32N160E 33N150E FERAR
C	14 Oct 1900 UTC	15 Oct 0800 UTC	NUDGE 52N140W 52N150W 49N160W 45N170W 41N180E 38N170E 38N160E EMRON
C	13 Oct 1900 UTC	14 Oct 0800 UTC	NUDGE 52N140W 54N150W 55N160W CAMBO DRAPP NATES NIKLL NYMPH NUZAN NRKEY NIPPI
C	15 Oct 1900 UTC	16 Oct 0800 UTC	KATCH HMPTN GRIZZ CJAYY 59N160W ORVIL NAYLD NULUK NANDY NATES NIKLL NYMPH NUZAN NRKEY NIPPI
E	13 Oct 1900 UTC	14 Oct 0800 UTC	REDWD UNVER 42N130W 48N140W 52N150W 54N160W OPAKE OLCOT OPHET OGDEN OMOTO
E	14 Oct 1900 UTC	15 Oct 0800 UTC	REDWD EDWIL 50N140W 51N150W 48N160W 44N170W 40N180E 37N170E 37N160E LEPKI
E	15 Oct 1900 UTC	16 Oct 0800 UTC	LINUZ NATTE ZANNG 50N140W 54N150W 57N160W PUGGY OFORD ONEIL OPAKE OLCOT OPHET OGDEN OMOTO
F	13 Oct 1900 UTC	14 Oct 0800 UTC	ALCOA BUTEN BOSKE 39N140W 41N150W 43N160W 42N170W 39N180E 37N170E 35N160E 35N150E SEALS
F	14 Oct 1900 UTC	15 Oct 0800 UTC	ALCOA BUTEN BOSKE 38N140W 38N150W 38N160W 38N170W 37N180E 36N170E 35N160E 35N150E SEALS
F	15 Oct 1900 UTC	16 Oct 0800 UTC	ALCOA BUTEN BOSKE 38N140W 37N150W 37N160W 37N170W 36N180E 35N170E 34N160E 35N150E SEALS
H	14 Oct 1900 UTC	15 Oct 0800 UTC	ALCOA BUTEN BOSKE 38N140W 38N150W 38N160W 37N170W 35N180E 32N170E 29N160E 28N150E 27N140E CANAI
H	15 Oct 1900 UTC	16 Oct 0800 UTC	ALCOA BUTEN BOSKE 38N140W 37N150W 37N160W 37N170W 36N180E 33N170E 30N160E 28N150E 27N140E CANAI
H	13 Oct 1900 UTC	14 Oct 0800 UTC	ALCOA BUTEN BOSKE 39N140W 40N150W 42N160W 41N170W 37N180E 34N170E 31N160E 29N150E 28N140E BIXAK
I	15 Oct 1900 UTC	16 Oct 0800 UTC	DINTY ADTIL 36N140W 36N150W 36N160W 36N170W 35N180E 33N170E 30N160E 28N150E 27N140E CANAI
I	13 Oct 1900 UTC	14 Oct 0800 UTC	AUDIA 35N130W 36N140W 37N150W 39N160W 40N170W 37N180E 34N170E 31N160E 29N150E 28N140E BIXAK
I	14 Oct 1900 UTC	15 Oct 0800 UTC	AUDIA 35N130W 35N140W 36N150W 37N160W 37N170W 35N180E 32N170E 29N160E 28N150E 27N140E CANAI
J	14 Oct 0500 UTC	14 Oct 2100 UTC	ALCOA CEPAS COBAD 40N140W 41N150W 41N160W 38N170W 35N180E 32N170E 29N160E 28N150E 27N140E CANAI
J	15 Oct 0500 UTC	15 Oct 2100 UTC	ALCOA CEPAS COBAD 41N140W 40N150W 39N160W 38N170W 36N180E 33N170E 30N160E 28N150E 27N140E CANAI
K	14 Oct 0500 UTC	14 Oct 2100 UTC	AUDIA 35N130W 36N140W 37N150W 39N160W 37N170W 34N180E 31N170E 28N160E 26N150E 25N140E TUNTO
K	15 Oct 0500 UTC	15 Oct 2100 UTC	AUDIA 35N130W 36N140W 37N150W 37N160W 37N170W 35N180E 32N170E 29N160E 27N150E 25N140E TUNTO
M	13 Oct 1900 UTC	14 Oct 0800 UTC	REDWD UNVER 42N130W 48N140W 50N150W 51N160W 49N170W 45N180E 41N170E 38N160E LEPKI
M	14 Oct 1900 UTC	15 Oct 0800 UTC	ALCOA BUTEN BOSKE 38N140W 38N150W 38N160W 38N170W 37N180E 36N170E 35N160E 35N150E SEALS
M	15 Oct 1900 UTC	16 Oct 0800 UTC	59N150W 59N160W ORVIL NAYLD NULUK NANDY NATES NIKLL NYMPH NUZAN NRKEY NIPPI