Easy Access Rules for ATM/ANS — Provision of Services

Ranges and resolutions for the numerical elements included in volcanic ash advisory, tropical cyclone advisory, SIGMET, AIRMET, aerodrome and wind shear warnings

Note: Row numbers in the ‘Ref.’ column are included only for clarity and ease of reference, and are not part of the template.

Ref.

Elements

Range

Resolution

1

Summit elevation:

FT

000–27 000

1

M

000–8 100

1

2

Advisory number:

for VA (index) (1)

000–2 000

1

for TC (index) (1)

00–99

1

3

Maximum surface wind:

KT

00–99

1

4

Central pressure:

hPa

850–1 050

1

5

Surface wind speed:

KT

30–99

1

6

Surface visibility:

M

0000–0750

50

M

0800–5 000

100

7

Cloud: height of base:

FT

000–1 000

100

8

Cloud: height of top:

FT

000–9 900

100

FT

10 000–60 000

1000

9

Latitudes:

° (degrees)

00–90

1

(minutes)

00–60

1

10

Longitudes:

° (degrees)

000–180

1

(minutes)

00–60

1

11

Flight levels:

000–650

10

12

Movement:

KMH

0–300

10

KT

0–150

5