NATs
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 25 Mar 1130 UTC 25 Mar 1900 UTC 57/20 59/30 59/40 59/50 - 310 320 330 350 360 370 380 390
B 25 Mar 1130 UTC 25 Mar 1900 UTC 56/20 58/30 58/40 58/50 - 310 320 330 340 350 360 370 380 390
C 25 Mar 1130 UTC 25 Mar 1900 UTC 55/20 57/30 57/40 57/50 - 310 320 330 340 350 360 370 380 390
D 25 Mar 1130 UTC 25 Mar 1900 UTC 54/20 56/30 56/40 56/50 - 310 320 330 340 350 360 370 380 390
E 25 Mar 1130 UTC 25 Mar 1900 UTC 53/20 55/30 55/40 55/50 - 310 320 330 340 350 360 370 380 390
F 25 Mar 1130 UTC 25 Mar 1900 UTC 52/20 54/30 54/40 54/50 - 310 320 330 340 350 360 370 380 390
G 25 Mar 1130 UTC 25 Mar 1900 UTC 5130/20 5330/30 5330/40 5330/50 - 350 360 370 380 390
H 25 Mar 1130 UTC 25 Mar 1900 UTC 51/20 53/30 53/40 53/50 - 310 320 330 340 350 360 370 380 390
J 25 Mar 1130 UTC 25 Mar 1900 UTC 50/20 52/30 52/40 52/50 - 310 320 330 340 350 360 370 380 390
K 25 Mar 1130 UTC 25 Mar 1900 UTC 49/20 51/30 51/40 51/50 - 310 320 330 340 350 360 370 380 390
L 25 Mar 1130 UTC 25 Mar 1900 UTC 47/40 44/50 - 320 340 360 380
M 25 Mar 1130 UTC 25 Mar 1900 UTC 42/40 39/50 35/60 - 320 340 360 380
S 26 Mar 0100 UTC 26 Mar 0800 UTC 51/50 54/40 56/30 57/20 320 330 340 350 360 370 380 390 400 -
T 26 Mar 0100 UTC 26 Mar 0800 UTC 50/50 53/40 55/30 56/20 320 330 340 350 360 370 380 390 400 -
U 25 Mar 0100 UTC 25 Mar 0800 UTC 53/50 55/40 57/30 58/20 58/15 320 330 340 350 360 370 380 390 400 -
U 26 Mar 0100 UTC 26 Mar 0800 UTC 49/50 52/40 54/30 55/20 320 330 340 350 360 370 380 390 400 -
V 25 Mar 0100 UTC 25 Mar 0800 UTC 52/50 54/40 56/30 57/20 320 330 340 350 360 370 380 390 400 -
V 26 Mar 0100 UTC 26 Mar 0800 UTC 4830/50 5130/40 5330/30 5430/20 350 360 370 380 390 -
W 25 Mar 0100 UTC 25 Mar 0800 UTC 51/50 53/40 55/30 56/20 320 330 340 350 360 370 380 390 400 -
W 26 Mar 0100 UTC 26 Mar 0800 UTC 48/50 51/40 53/30 54/20 320 330 340 350 360 370 380 390 400 -
X 25 Mar 0100 UTC 25 Mar 0800 UTC 5030/50 5230/40 5430/30 5530/20 350 360 370 380 390 -
X 26 Mar 0100 UTC 26 Mar 0800 UTC 47/50 50/40 52/30 53/20 320 330 340 350 360 370 380 390 400 -
Y 25 Mar 0100 UTC 25 Mar 0800 UTC 50/50 52/40 54/30 55/20 320 330 340 350 360 370 380 390 400 -
Y 26 Mar 0100 UTC 26 Mar 0800 UTC 46/50 49/40 51/30 52/20 320 330 340 350 360 370 380 390 400 -
Z 25 Mar 0100 UTC 25 Mar 0800 UTC 49/50 51/40 53/30 54/20 320 330 340 350 360 370 380 390 400 -
Z 26 Mar 0100 UTC 26 Mar 0800 UTC 41/60 44/50 47/40 50/30 51/20 320 340 360 380 400 -
PACOTS
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 Mar 0700 UTC 25 Mar 2100 UTC 38N160E 39N170E 40N180E 41N170W 42N160W 44N150W 46N140W
11 25 Mar 1000 UTC 25 Mar 2100 UTC 34N150E 34N160E 33N170E 31N180E 28N170W
14 25 Mar 0700 UTC 25 Mar 2100 UTC 35N150E 35N160E 36N170E 37N180E 38N170W 39N160W 40N150W 40N140W 38N130W
2 25 Mar 0700 UTC 25 Mar 2100 UTC 37N160E 38N170E 39N180E 40N170W 41N160W 42N150W 42N140W 41N130W
3 25 Mar 0700 UTC 25 Mar 2100 UTC 36N150E 36N160E 37N170E 38N180E 39N170W 40N160W 41N150W 41N140W 39N130W
8 25 Mar 0700 UTC 25 Mar 2100 UTC 37N160E 38N170E 39N180E 40N170W 41N160W 42N150W 43N140W 42N130W
A 25 Mar 1900 UTC 26 Mar 0800 UTC 26N170W 32N180E 39N170E 40N160E
B 25 Mar 1900 UTC 26 Mar 0800 UTC 26N170W 32N180E 39N170E 39N160E 36N150E
C 25 Mar 1900 UTC 26 Mar 0800 UTC 53N140W 55N150W 55N160W 55N170W 55N180E
E 25 Mar 1900 UTC 26 Mar 0800 UTC 49N140W 51N150W 52N160W 53N170W
F 25 Mar 1900 UTC 26 Mar 0800 UTC 42N130W 47N140W 49N150W 50N160W 50N170W 49N180E 47N170E 44N160E
K 25 Mar 0500 UTC 25 Mar 2100 UTC 42N130W 47N140W 50N150W 51N160W 50N170W 49N180E 47N170E 44N160E
M 25 Mar 1900 UTC 26 Mar 0800 UTC 60N150W 59N160W 57N170W 56N180E
Warning: Do not use this data for real-world aviation or navigation. No guarantee of current accuracy is given.