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	21 Sep 1130 UTC	21 Sep 1900 UTC	58/15 59/20 59/30 59/40 57/50 HOIST		310 320 330 340 350 360 370 380 390
A	20 Sep 1130 UTC	20 Sep 1900 UTC	BALIX 60/15 60/20 60/30 60/40 59/50 AVUTI		310 320 330 350 360 370
B	21 Sep 1130 UTC	21 Sep 1900 UTC	57/20 58/30 58/40 56/50 JANJO		310 320 330 340 350 360 370 380 390
B	20 Sep 1130 UTC	20 Sep 1900 UTC	58/15 59/20 59/30 59/40 58/50 DORYY		310 320 330 340 350 360 370 380 390
C	20 Sep 1130 UTC	20 Sep 1900 UTC	57/20 58/30 58/40 57/50 HOIST		310 320 330 340 350 360 370 380 390
D	21 Sep 1130 UTC	21 Sep 1900 UTC	55/20 56/30 56/40 54/50 NEEKO		310 320 330 340 350 360 370 380 390
E	21 Sep 1130 UTC	21 Sep 1900 UTC	NEBIN 54/20 55/30 55/40 53/50 RIKAL		310 320 330 340 350 360 370 380 390
E	20 Sep 1130 UTC	20 Sep 1900 UTC	55/20 56/30 56/40 55/50 LOMSI		310 320 330 340 350 360 370 380 390
R	21 Sep 0100 UTC	21 Sep 0800 UTC	ELSIR 50/50 52/40 53/30 54/20 BEXET	320 330 340 350 360 370 380 390 400
S	20 Sep 0100 UTC	20 Sep 0800 UTC	ALLRY 51/50 52/40 53/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
S	21 Sep 0100 UTC	21 Sep 0800 UTC	JOOPY 49/50 51/40 52/30 53/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
T	21 Sep 0100 UTC	21 Sep 0800 UTC	NICSO 48/50 50/40 51/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
T	20 Sep 0100 UTC	20 Sep 0800 UTC	ELSIR 50/50 51/40 52/30 52/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
U	21 Sep 0100 UTC	21 Sep 0800 UTC	OMSAT 4730/50 4930/40 5030/30 5130/20 ADARA LEKVA	350 360 370 380 390
U	20 Sep 0100 UTC	20 Sep 0800 UTC	JOOPY 49/50 50/40 51/30 51/20	320 330 340 350 360 370 380 390 400
V	21 Sep 0100 UTC	21 Sep 0800 UTC	PORTI 47/50 49/40 50/30 51/20	320 330 340 350 360 370 380 390 400
V	20 Sep 0100 UTC	20 Sep 0800 UTC	MUSAK 4830/50 4930/40 5030/30 5030/20	350 360 370 380 390
W	20 Sep 0100 UTC	20 Sep 0800 UTC	NICSO 48/50 49/40 50/30 50/20	320 330 340 350 360 370 380 390 400
W	21 Sep 0100 UTC	21 Sep 0800 UTC	SUPRY 46/50 48/40 49/30 50/20	320 330 340 350 360 370 380 390 400
X	20 Sep 0100 UTC	20 Sep 0800 UTC	PORTI 47/50 48/40 49/30 49/20	320 330 350 360 380 390 400
X	21 Sep 0100 UTC	21 Sep 0800 UTC	RAFIN 45/50 47/40 48/30 49/20	320 330 350 360 370 380 390 400
Y	21 Sep 0100 UTC	21 Sep 0800 UTC	DOVEY 42/60 44/50 46/40 47/30 48/20 48/15 OMOKO	320 360 380 400
Y	20 Sep 0100 UTC	20 Sep 0800 UTC	SUPRY 46/50 47/40 48/30 48/20 48/15 OMOKO	320 330 350 360 380 390 400
Z	21 Sep 0100 UTC	21 Sep 0800 UTC	40/60 43/50 45/40 46/30 47/20 47/15 SEPAL LAPEX	320 360 380 400
Z	20 Sep 0100 UTC	20 Sep 0800 UTC	SOORY 44/50 45/40 46/30 47/20 47/15 ETIKI REGHI	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	20 Sep 0700 UTC	20 Sep 2100 UTC	ADGOR AMOND CDB 55N160W 53N150W 51N140W ORNAI
11	21 Sep 1000 UTC	21 Sep 2100 UTC	SEALS 35N150E 35N160E 33N170E 30N180E 26N170W LILIA
11	20 Sep 1000 UTC	20 Sep 2100 UTC	LEPKI 37N160E 35N170E 32N180E 28N170W DANNO
14	21 Sep 0700 UTC	21 Sep 2100 UTC	LEPKI 39N160E 43N170E 45N180E 47N170W 47N160W 44N150W 42N140W 38N130W ALLBE
14	20 Sep 0700 UTC	20 Sep 2100 UTC	EMRON 41N160E 44N170E 46N180E 47N170W 46N160W 44N150W 42N140W 38N130W ALLBE
2	21 Sep 0700 UTC	21 Sep 2100 UTC	EMRON 41N160E 45N170E 48N180E 49N170W 49N160W 47N150W 44N140W 42N130W VESPA
3	21 Sep 0700 UTC	21 Sep 2100 UTC	LEPKI 40N160E 44N170E 47N180E 48N170W 48N160W 46N150W 43N140W 40N130W DACEM
3	20 Sep 0700 UTC	20 Sep 2100 UTC	EMRON 42N160E 45N170E 48N180E 49N170W 47N160W 45N150W 43N140W 40N130W DACEM
8	20 Sep 0700 UTC	20 Sep 2100 UTC	ADGOR AGEDI AKISU ASPIN AAMYY SYA AMOND DRAPP CRYPT CDB 55N160W 53N150W 51N140W ORNAI
A	21 Sep 1900 UTC	22 Sep 0800 UTC	DANNO ECEDO 28N170W 30N180E 31N170E 32N160E 33N150E FERAR
C	20 Sep 1900 UTC	21 Sep 0800 UTC	PRETY 50N140W 50N150W 48N160W 45N170W 43N180E 41N170E 39N160E EMRON
C	21 Sep 1900 UTC	22 Sep 0800 UTC	NUDGE 50N140W 47N150W 44N160W 42N170W 40N180E 38N170E 37N160E LEPKI
C	19 Sep 1900 UTC	20 Sep 0800 UTC	KATCH HMPTN GRIZZ CJAYY 58N160W CHUUK OBOYD NATES NIKLL NYMPH NUZAN NRKEY NIPPI
E	19 Sep 1900 UTC	20 Sep 0800 UTC	ALCOA CEPAS COBAD 40N140W 41N150W 42N160W 41N170W 40N180E 39N170E 38N160E LEPKI
E	21 Sep 1900 UTC	22 Sep 0800 UTC	ALCOA CEPAS COBAD 40N140W 41N150W 39N160W 37N170W 36N180E 35N170E 35N160E 35N150E SEALS
E	20 Sep 1900 UTC	21 Sep 0800 UTC	ALCOA CEPAS COBAD 39N140W 40N150W 40N160W 39N170W 38N180E 37N170E 36N160E LEPKI
F	19 Sep 1900 UTC	20 Sep 0800 UTC	ALCOA BUTEN BOSKE 39N140W 40N150W 41N160W 40N170W 38N180E 37N170E 36N160E 35N150E SEALS
F	20 Sep 1900 UTC	21 Sep 0800 UTC	ALCOA BUTEN BOSKE 38N140W 39N150W 39N160W 38N170W 37N180E 36N170E 35N160E 35N150E SEALS
H	19 Sep 1900 UTC	20 Sep 0800 UTC	ALCOA BUTEN BOSKE 38N140W 39N150W 40N160W 39N170W 36N180E 33N170E 31N160E 29N150E 27N140E CANAI
H	20 Sep 1900 UTC	21 Sep 0800 UTC	ALCOA BUTEN BOSKE 38N140W 39N150W 39N160W 37N170W 35N180E 33N170E 31N160E 29N150E 27N140E CANAI
H	21 Sep 1900 UTC	22 Sep 0800 UTC	ALCOA BUTEN BOSKE 39N140W 40N150W 38N160W 36N170W 35N180E 33N170E 31N160E 30N150E 28N140E CANAI
I	19 Sep 1900 UTC	20 Sep 0800 UTC	DINTY 35N130W 36N140W 37N150W 38N160W 37N170W 35N180E 33N170E 31N160E 29N150E 27N140E CANAI
J	20 Sep 0500 UTC	20 Sep 2100 UTC	ALCOA BUTEN BOSKE 38N140W 38N150W 38N160W 37N170W 35N180E 33N170E 31N160E 29N150E 27N140E CANAI
J	21 Sep 0500 UTC	21 Sep 2100 UTC	ALCOA BUTEN BOSKE 38N140W 39N150W 39N160W 37N170W 35N180E 33N170E 31N160E 29N150E 27N140E CANAI
K	20 Sep 0500 UTC	20 Sep 1330 UTC	AUDIA ADTIL 35N140W 36N150W 37N160W 36N170W 35N180E 33N170E 31N160E 29N150E 27N140E CANAI
K	21 Sep 0500 UTC	21 Sep 2100 UTC	AUDIA 35N130W 37N140W 38N150W 38N160W 36N170W 34N180E 33N170E 31N160E 29N150E 27N140E CANAI
M	21 Sep 1900 UTC	22 Sep 0800 UTC	ALCOA CEPAS COBAD 40N140W 41N150W 39N160W 37N170W 36N180E 35N170E 35N160E 35N150E SEALS
M	19 Sep 1900 UTC	20 Sep 0800 UTC	59N150W 58N160W CHUUK OBOYD NATES NIKLL NYMPH NUZAN NRKEY NIPPI
M	20 Sep 1900 UTC	21 Sep 0800 UTC	ALCOA CEPAS COBAD 39N140W 40N150W 40N160W 39N170W 38N180E 37N170E 36N160E LEPKI