Information of Rwy conditions will be expressed by means of

the figure group :

-Denotes the

-Denotes the

-Denotes the -Denotes the

-Denotes the

-Denotes the

-Denotes the

Fnobre / 27May2012

The message preceded by indicador R followed by the threshold designator ( DRDR ). This

will be expressed as two digits corresponding to the Rwy designator, e.g. R09/, R27/, R35/,

etc. Parallel Rwys are designated by the letters L (left), C (center) and R (right Rwy).

The information to be included in Rwy state messages will be for the main

instrument Rwy or Rwys in use. When parallel Rwys are in use, information on both Rwys

will be included or, where this is not possible, the information given may not alternate

between the two Rwys, but should be given for the Rwy with the best surface conditions.

Fnobre / 27May2012

The type of deposits on the Rwy will be indicated by the digits 0 to 9 or a slash ( / ) in

accordance with the following scale as follows:

– clear and dry

– damp

– wet or water patches – wet or water patches

- rime or frost covered < 1mm

- dry snow

- wet snow

- slush

- ice

- compacted or rolled snow

- frozen ruts

- Type of deposits not reported

Fnobre / 27May2012

The extent of contamination through deposits on the Rwy is indicated in percentages in

accordance with the following scale: It will be expressed as a single digit:

– up to 10% of Rwy contaminated (covered).– up to 10% of Rwy contaminated (covered).

– more than 10% to 25% of Rwy contaminated (covered)

– more than 25% to 50% of Rwy contaminated (covered)

- more than 50% to 100% of Rwy contaminated (covered)

- not reported

Fnobre / 27May2012

The depth of deposits is indicated by two digits in accordance with the following scale:

- less than 1mm

- = 1mm

- = 2mm

Etc.

- = 10mm

- = 15mm

Etc, up toEtc, up to

- = 90mm

Thereafter, the depth in indicated by:

- = 10cm

- = 15cm

- = 20cm

- = 25cm

- = 30cm

- = 35cm

- = 40cm or more

- = Rwy or Rwys non-operational due to snow, slush, ice, large drifts or Rwy clearance.

- = Depth of deposits operationally not significant or not measurableFnobre / 27May2012

This does not necessarily require depth to be measured to a milimeter unit. Larger

intervals up to 90 can be expressed by using the above direct reading scale.

Where depth is measured at a number of points along the Rwy the average value Where depth is measured at a number of points along the Rwy the average value

should be transmitted or, if operationally significant, the highest value.

code figure 91 is not used. Code figures 92 to 98 permit the depth of deposits

(in cm) to be derived by multiplying the last digit by 5 (e.g. 94= 4x5=20).

If deposits of the type reported by the code figures 3, 7, 8 and 9 of code ER are

reported, the depth of deposits is normally not significant and two oblique strokes ( // )

will be reported. Similarly, the depth of standing water will only be reported if an accurate

and representative measurement is guaranteed.

Fnobre / 27May2012

The friction co-efficient is denoted by two digits or, if the co-efficient is not avbl, the

estimated braking action is denoted by two digits.

Friction co-efficient

Example:

– friction co-efficient 0.28

– friction co-efficient 0.35– friction co-efficient 0.35

Etc.

Braking action

- = Good

- = Medium/Good

- = Medium

- = Medium / Poor

- = Poor

- = Unreliable

- = Braking action not reported: Rwy nor opr, aerodrome clsd; etc.

Fnobre / 27May2012

The friction co-efficient is denoted by two digits or, if the co-efficient is not avbl, the

estimated braking action is denoted by two digits.

Where Braking action is assessed at a number of points along a Rwy, the mean

value will be transmitted or, if operationally significant, the lowest value.

If measuring equipment does not allow measurement of friction with satisfactory If measuring equipment does not allow measurement of friction with satisfactory

reliability, which may be the case when a Rwy is contaminated by wet snow, slush, or loose

snow, the figures 99 will be used.

If the breaking conditions cannot be reported, (due to Rwy clearance in progress,

Rwy not operational, Rwy conditions not watched during airport closure, etc.) two oblique

strokes ( // ) will be entered.

The occasion may arise when a new report or valid report is not avbl in time for

dissemination with appropriate METAR message. In this case, the previous Rwy state

report will be repeated, as indicated by figures R99/ in place of Rwy designator.

Fnobre / 27May2012

35 4 2 15 94

88 = all runway

35 = 35L

85 = 35R (35+50)

35CLRD// = normal condition

35SNOCLO = rwy closed

99 = message repeated

1< 10%

2 from 11% to 25%

5 from 26% to 50%

9 from 51% to 100%

/ unreliable

95 = good / 0.40 and above

94 = medium good / 0.39 to 0.36

93 = medium / 0.35 to 0.30

92 = medium poor / 0.29 to 0.26

91 = poor / 0.25 and below

99 = unreliable

35 4 2 15 94

over total runway length

0 – clear and dry

1 – damp

2 – wet or water patches

3 - rime or frost covered < 1mm

4 - dry snow

5 - wet snow

6 - slush

7 - ice

8 - compacted or rolled snow

9 - frozen ruts

/ - not reported

00 < 1mm

01 to 90 in mm

91 not used

92 to 98 from 10cm to 40 cm

Es: 93 = 3x5= 15 cm

96 = 6x5= 30 cm

99 runway out of service

/ / depth not measurable

Ref:

ICAO anexo 15 apendice 2

SIMPLE LANGUAGE

Simple Rwy:

R03/

R21/

If Parallel Rwys:

R03L

R03C

R03R

Fnobre / 27May2012

- Dry snow covering 11% to 25% of the Rwy; depth 15mm; braking

action medium to good.

- Rwy 14 non-operational (due to Rwy clearance in progress)- Rwy 14 non-operational (due to Rwy clearance in progress)

- Rwy 14 non-operational (due to Rwy clearance in progress)

- All Rwys are contaminated but reports are not avbl or are not updated

due to aerodrome closure etc…

Fnobre / 27May2012