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	22 Jan 1130 UTC	22 Jan 1900 UTC	50/20 49/30 49/40 48/50 NICSO		310 320 330 350 360 370 390
A	23 Jan 1130 UTC	23 Jan 1900 UTC	MALOT 53/20 53/30 53/40 53/50 RIKAL		310 320 330 340 350 360 370 380 390
B	22 Jan 1130 UTC	22 Jan 1900 UTC	49/20 48/30 48/40 47/50 PORTI		310 320 330 350 360 370 390
B	23 Jan 1130 UTC	23 Jan 1900 UTC	LIMRI 52/20 52/30 52/40 52/50 TUDEP		310 320 330 340 350 360 370 380 390
C	23 Jan 1130 UTC	23 Jan 1900 UTC	ADARA 5130/20 5130/30 5130/40 5130/50 UMESI		350 360 370 380 390
C	22 Jan 1130 UTC	22 Jan 1900 UTC	48/20 47/30 47/40 46/50 SUPRY		310 320 330 350 360 370 390
D	23 Jan 1130 UTC	23 Jan 1900 UTC	51/20 51/30 51/40 51/50 ALLRY		310 320 330 340 350 360 370 380 390
D	22 Jan 1130 UTC	22 Jan 1900 UTC	OMOKO 48/15 47/20 46/30 46/40 45/50 RAFIN		310 320 330 350 360 370 390
E	22 Jan 1130 UTC	22 Jan 1900 UTC	ETIKI 47/15 46/20 45/30 45/40 44/50 BOBTU JAROM		310 320 330 350 360 370 390
E	23 Jan 1130 UTC	23 Jan 1900 UTC	50/20 50/30 50/40 50/50 ELSIR		310 320 330 340 350 360 370 380 390
F	23 Jan 1130 UTC	23 Jan 1900 UTC	49/20 49/30 49/40 49/50 JOOPY		310 320 330 340 350 360 370 380 390
F	22 Jan 1130 UTC	22 Jan 1900 UTC	44/40 43/50 JEBBY CARAC		320 340 360 380
G	22 Jan 1130 UTC	22 Jan 1900 UTC	42/40 40/50 SOORY		320 340 360 380
G	23 Jan 1130 UTC	23 Jan 1900 UTC	ETIKI 48/15 48/20 48/30 48/40 48/50 NICSO		310 320 330 350 360 370 390
H	22 Jan 1130 UTC	22 Jan 1900 UTC	40/40 38/50 34/60		320 340 360 380
Q	23 Jan 0100 UTC	23 Jan 0800 UTC	DORYY 58/50 59/40 60/30 60/20 ERAKA ETSOM	320 330 340 350 360 370 380 390 400
R	22 Jan 0100 UTC	22 Jan 0800 UTC	DORYY 58/50 59/40 59/30 58/20	320 330 340 350 360 370 380 390 400
S	23 Jan 0100 UTC	23 Jan 0800 UTC	JANJO 56/50 57/40 58/30 58/20	320 330 340 350 360 370 380 390 400
U	22 Jan 0100 UTC	22 Jan 0800 UTC	JANJO 56/50 57/40 57/30 56/20	320 330 340 350 360 370 380 390 400
V	23 Jan 0100 UTC	23 Jan 0800 UTC	NEEKO 54/50 55/40 56/30 56/20	320 330 340 350 360 370 380 390 400
V	22 Jan 0100 UTC	22 Jan 0800 UTC	LOMSI 55/50 56/40 56/30 55/20 BEXET	320 330 340 350 360 370 380 390 400
W	23 Jan 0100 UTC	23 Jan 0800 UTC	RIKAL 53/50 54/40 55/30 55/20 BEXET	320 330 340 350 360 370 380 390 400
W	22 Jan 0100 UTC	22 Jan 0800 UTC	NEEKO 54/50 55/40 55/30 54/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
X	22 Jan 0100 UTC	22 Jan 0800 UTC	RIKAL 53/50 54/40 54/30 53/20 LIMRI XETBO	320 330 340 350 360 370 380 390 400
X	23 Jan 0100 UTC	23 Jan 0800 UTC	TUDEP 52/50 53/40 54/30 54/20 MALOT GISTI	320 330 340 350 360 370 380 390 400
Y	22 Jan 0100 UTC	22 Jan 0800 UTC	TUDEP 52/50 53/40 53/30 52/20	320 330 340 350 360 370 380 390 400
Y	23 Jan 0100 UTC	23 Jan 0800 UTC	SOORY 43/50 48/40 51/30 51/20	320 400
Z	22 Jan 0100 UTC	22 Jan 0800 UTC	SOORY 44/50 47/40 49/30 49/20	320 360 400
Z	23 Jan 0100 UTC	23 Jan 0800 UTC	36/50 43/40 48/30 50/20	320 400

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	22 Jan 0700 UTC	22 Jan 2100 UTC	LEPKI 38N160E 39N170E 40N180E 42N170W 45N160W 47N150W 49N140W PRETY
1	23 Jan 0700 UTC	23 Jan 2100 UTC	LEPKI 37N160E 37N170E 38N180E 40N170W 42N160W 45N150W 47N140W ROUKE
11	22 Jan 1000 UTC	22 Jan 2100 UTC	FERAR 34N150E 34N160E 34N170E 32N180E 29N170W DANNO
11	23 Jan 1000 UTC	23 Jan 2100 UTC	FERAR 33N150E 31N160E 32N170E 31N180E 28N170W DANNO
14	23 Jan 0700 UTC	23 Jan 2100 UTC	DOVAG 30N140E 32N150E 32N160E 33N170E 34N180E 35N170W 36N160W 37N150W 38N140W 38N130W ALLBE
14	22 Jan 0700 UTC	22 Jan 2100 UTC	DOVAG UKATA 33N150E 35N160E 35N170E 35N180E 36N170W 37N160W 38N150W 39N140W 38N130W ALLBE
2	23 Jan 0700 UTC	23 Jan 2100 UTC	SEALS 35N150E 34N160E 35N170E 36N180E 37N170W 38N160W 40N150W 41N140W 40N130W SHENU
2	22 Jan 0700 UTC	22 Jan 2100 UTC	SEALS 36N150E 37N160E 37N170E 37N180E 38N170W 40N160W 41N150W 42N140W 41N130W TRYSH
8	22 Jan 0700 UTC	22 Jan 2100 UTC	LEPKI 38N160E 39N170E 40N180E 42N170W 45N160W 47N150W 49N140W PRETY
8	23 Jan 0700 UTC	23 Jan 2100 UTC	SEALS 35N150E 34N160E 35N170E 36N180E 37N170W 38N160W 41N150W 43N140W 44N130W KYLLE ONP
C	22 Jan 1900 UTC	23 Jan 0800 UTC	JOWEN LOHNE ARCAL 59N160W SELDM OGGOE NANDY NATES NIKLL NYMPH NUZAN NRKEY NIPPI
C	21 Jan 1900 UTC	22 Jan 0800 UTC	KATCH HMPTN GRIZZ CJAYY 59N160W ONEOX NANDY NATES NIKLL NYMPH NUZAN NRKEY NIPPI
E	22 Jan 1900 UTC	23 Jan 0800 UTC	REDWD TRYSH GAPNE 45N140W 49N150W 52N160W 54N170W 54N180E OPAKE OLCOT OPHET OGDEN OMOTO
E	21 Jan 1900 UTC	22 Jan 0800 UTC	ALCOA CEPAS COBAD 42N140W 47N150W 51N160W 53N170W CURVS OPAKE OLCOT OPHET OGDEN OMOTO
F	21 Jan 1900 UTC	22 Jan 0800 UTC	ALCOA BUTEN BOSKE 40N140W 43N150W 47N160W 49N170W 49N180E 47N170E 44N160E EMRON
F	22 Jan 1900 UTC	23 Jan 0800 UTC	ALCOA CEPAS COBAD 42N140W 45N150W 48N160W 49N170W 49N180E 47N170E 44N160E EMRON
J	22 Jan 0500 UTC	22 Jan 2100 UTC	REDWD TRYSH 41N130W 46N140W 52N150W 56N160W ONEOX NULUK NANDY NATES NIKLL NYMPH NUZAN NIPPI
J	23 Jan 0500 UTC	23 Jan 2100 UTC	REDWD UNVER 42N130W 48N140W 52N150W 56N160W ONEOX NULUK NANDY NATES NIKLL NYMPH NUZAN NIPPI
M	22 Jan 1900 UTC	23 Jan 0800 UTC	JOWEN LOHNE ARCAL 59N160W SELDM OGGOE NANDY NATES NIKLL NYMPH NUZAN NRKEY NIPPI
M	21 Jan 1900 UTC	22 Jan 0800 UTC	JOWEN LOHNE ARCAL 59N160W ONEOX NANDY NATES NIKLL NYMPH NUZAN NRKEY NIPPI