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1 of 33
Department:
Document Identification:
Issue Date:
ASD
ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
1. Introduction
The new ICAO methodology for assessing and reporting runway surface conditions, commonly known
as the Global Reporting Format (GRF), enables the harmonized assessment and reporting of runway
surface conditions and a correspondingly improved flight crew assessment of take-off and landing
performance.
The GRF, applicable on 4 November 2021, is described through amendment 13-B to Annex 14 —
Aerodromes, Volume I — Aerodrome Design and Operations; Annex 3 — Meteorological Service for
International Air Navigation; Annex 6 — Operation of Aircraft, Part I — International Commercial Air
Transport — Aeroplanes and Part II — International General Aviation — Aeroplanes; Annex 8 —
Airworthiness of Aircraft; Annex 15 — Aeronautical Information Services and Procedures for Air
Navigation Services (PANS) — Aerodromes (PANS-Aerodromes, Doc 9981), Aeronautical
Information Management (PANS-AIM, Doc 10066) and Air Traffic Management (PANS-ATM, Doc
4444).
In addition, supporting material is available in Circular 355, Assessment, Measurement and Reporting
of Runway Surface Conditions and in the Doc 10064 Aeroplane Performance Manual (in preparation).
2. Purpose
The purpose of this leaflet is to detail on the new SNOWTAM format and the phraseology to be used
by the air traffic controllers in the State of Qatar as of 04th of November 2021 regarding the runway
conditions report.
3. References
Document ID Document Name
ICAO Annexes Annex 14 Aerodromes, Volume I — Aerodrome Design and
Operations
Annex 3 Meteorological Service for International Air Navigation
Annex 6 Operation of Aircraft, Part I — International Commercial Air
Transport — Aeroplanes
Annex 6 Operation of Aircraft, Part II — International General Aviation
— Aeroplanes
Annex 8 Airworthiness of Aircraft
Annex 15 Aeronautical Information Services
ICAO PANS Aerodromes (PANS-Aerodromes), Doc 9981
Aeronautical Information Management (PANS-AIM, Doc 10066)
Air Traffic Management (PANS-ATM, Doc 4444)
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Department:
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Issue Date:
ASD
ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
4. Content
4.1. General
4.1.1. The ICAO global reporting system and format is developed based upon the operational need
for information for the safe operation of the aircraft through performance-relevant reporting
of runway conditions.
4.1.2. Runway surface conditions have contributed to many safety events and investigations have
revealed shortfalls in the accuracy and timeliness of assessment and reporting methods
currently provided for in ICAO provisions and guidance material.
4.2. GRF Process
4.3. Dissemination of information
4.3.1. Through the AIS and ATIS: when the runway is wholly or partly contaminated by standing
water, snow, slush, ice or frost, or is wet associated with the clearing or treatment of snow,
slush, ice or frost.
4.3.2. Through the ATS only: when the runway is wet, not associated with the presence of snow,
slush, ice or frost.
3 of 33
Department:
Document Identification:
Issue Date:
ASD
ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
4.4. SNOWTAM vs ATIS vs ATC Radio (pros and cons)
SNOWTAM ATIS ATC radio
Comprehensiveness of
information
High
(information provided by
SNOWTAM is
comprehensive/detailed)
Medium
(ATIS message
should be short,
no detailed
information)
Medium
(ATC message on
radio should be
short; no detailed
information)
Timeliness (promptness)
Low
(SNOWTAM needs time
to be processed)
Medium
(ATIS information
is updated on
regular basis)
High
(ATC can pass
information on
radio instantly)
Controller workload Low Low High
Pilot workload during flight Low Medium Medium
4.5. ATIS Provisions in Circular 355
An ATIS presents a very important means of transmitting information, relieving operational personnel
from the routine duty of transmitting runway conditions and other relevant information to the flight
crew. In addition to normal operational and weather information, the following information about the
runway condition should be mentioned whenever the runway is not dry (RWYCC 6):
• Aeroplane performance section:
a) operational runway in use at time of issuance;
b) RWYCC for the operational runway, for each runway third in the operational direction;
c) condition description, coverage and depth (for loose contaminants);
d) width of the operational runway to which the RWYCC applies, if less than the published
width; and
e) reduced length, if less than the published length.
• Situational awareness section:
f) drifting snow;
g) loose sand;
h) operationally significant snowbanks;
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ANSI.01/21
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
i) runway exits, taxiways and apron if POOR; and
j) any other pertinent information in short, plain language.
4.5.1. ATIS Structure & Content
• Follow the order described in ICAO Annex 11;
• Articulate the content of the RCR/SNOWTAM excluding NR,
▪ NR is a syntax requirement of the NOTAM/SNOWTAM for automated handling.
It is not intented to reflect observation or report omissions.
o Reflect the runway in use (not the lowest runway designator of the RCR/SNOWTAM)
o Refer to first, second and third parts of the runway. The first part always means the
first third of the runway in the direction of landing and take off
• Include both the performance content and situational awareness of RCR/SNOWTAM for
both arrival and departure
▪ Situational awareness content not needed for arrival performance calculations,
but flight crew will likely request such information.
• Announce RWYCC for the full runway, followed by contaminent coverage, depth and
descriptor per runway third
▪ RWYCC, contaminant coverage, depth and descriptor may also be announced
separately for the whole runway
o Always announce contaminent coverage, depth and descriptor for each third, even if
2 or more thirds are the same
• Make reference to “upgrade” or “downgrade” after an RWYCC, if appropriate
▪ The GRF allows for an upgrading or downgrading of RWYCC
• After a period of contamination, a dry runway should be announced by ATIS
▪ Restoration of a dry runway is a significant change that should also trigger a
new SNOWTAM
4.6. New SNOWTAM Provisions & SNOWTAM Format
4.6.1. Changes in SNOWTAM definition: SNOWTAM. A special series NOTAM given in a standard
format providing a surface condition report notifying the presence or cessation of hazardous
conditions due to snow, ice, slush, frost, standing water or water associated with snow, slush,
ice, or frost on the movement area.
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ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
4.6.2. SNOWTAM Provisions:
• Metric units shall be used in SNOWTAM and the unit of measurement (e.g. mm, cm, m,
etc.) should not be reported.
• As of 4 November 2021, the maximum validity of SNOWTAM is 8 hours.
• A SNOWTAM cancels the previous SNOWTAM. When a new SNOWTAM is issued for a
specific aerodrome that has another valid SNOWTAM, the new one automatically replaces
the older SNOWTAM (there is no need to reference the older SNOWTAM in the new
SNOWTAM, as what we do for NOTAM).
• the letters used to indicate items (A to T; third column of the SNOWTAM template) are
only used for reference purpose and should not be included in the messages.
Example (items B to G): 01150915 12L 5/2/2 100/50/75 NR/06/06 WET/SLUSH/SLUSH
4.6.3. Mandatory information in SNOWTAM:
• Item A - Aerodrome location indicator (EADD)
• Item B - Date and time of assessment (11111035)
• Item C - Lower runway designator number (09R)
• Item D - Runway condition code (RWYCC) for each runway third (5/4/4)
• Item G - Condition description for each runway third (SLUSH/COMPACTED
SNOW/COMPACTED SNOW) (mandatory only when RWYCC is reported 1 to 5; not
needed if RWYCC is 0 or 6)
Example: a SNOWTAM with the minimum (mandatory) information:
GG EADBZTZX …
111045 EADDYNYX
SWEA0124 EADD 01111035
(SNOWTAM 0124
EADD
01111035 09R 5/4/4 NR/NR/NR/NR/NR/NR SLUSH/COMPACTED
SNOW/COMPACTED SNOW
4.6.4. Significant Change
• New SNOWTAM shall be issued whenever a new runway condition report (RCR) is
received from the aerodrome operator.
• RCR shall be initiated when a significant change in runway surface condition occurs.
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ANSI.01/21
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
• A change in the runway surface condition is considered significant whenever there is:
a) any change in the RWYCC (ref. item D);
b) any change in contaminant type (ref. item G);
c) any change in reportable contaminant coverage/percentage (ref. item E);
d) any change in contaminant depth (ref. item F); and
e) any other information, for example a pilot report of runway braking action, which
according to assessment techniques used, are known to be significant.
• Reporting of the runway surface condition should continue to reflect significant changes
until the runway is no longer contaminated.
4.6.5. SNOWTAM Format
ABBREVIATED HEADING TTAAiiii CCCC MMYYGGgg (BBB)
• TT = data designator for SNOWTAM = SW;
• AA = geographical designator for States, e.g. LF = FRANCE, EG = United Kingdom (see
Location Indicators (Doc 7910), Part 2, Index to Nationality Letters for Location Indicators);
• iiii = SNOWTAM serial number in a four-digit group;
• CCCC = four-letter location indicator of the aerodrome to which the SNOWTAM refers
(see Location Indicators (Doc 7910));
• MMYYGGgg = date/time of observation/measurement, whereby:
• MM = month, e.g. January = 01, December = 12
• YY = day of the month
• GGgg = time in hours (GG) and minutes (gg) UTC;
• (BBB) = optional group for correction, in the case of an error, to a SNOWTAM message
previously disseminated with the same serial number = COR
Example: SWLF0149 LFPG 11070620
SNOWTAM Serial Number SNOWTAM iiii
• SNOWTAM = The text “SNOWTAM” in the SNOWTAM Format;
• iiii = SNOWTAM serial number in a four-digit group;
Example: SNOWTAM 0149
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ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
Note — The SNOWTAM serial number resets at the beginning of each calendar year (begins
with SNOWTAM 0001 on January 1 at 0000 UTC).
4.6.6. SNOWTAM 2021 Format
1. Aeroplane performance Section
• Item A - Aerodrome location indicator
• Item B - Date and time of assessment
• Item C - Lower runway designator number
• Item D - Runway condition code (each runway third)
• Item E - Per cent coverage (each runway third)
• Item F - Depth of loose contaminant (each runway third)
• Item G - Condition description for each third
• Item H - Width of RWY to which the RWYCCs apply
2. Situational Awareness Section
• Item I - Reduced runway length
• Item J - Drifting snow on the runway
• Item K - Loose sand on the runway
• Item L - Chemical treatment on RWY
• Item M - Snow banks on the runway
• Item N - Snow banks on the taxiway
• Item O - Snow banks adjacent to the runway
• Item P - Taxiway conditions
• Item R - Apron conditions
• Item S - Measured friction coefficient
• Item T - Plain language remarks
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ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
4.6.6.1. Aeroplane performance Section
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
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ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
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ANSI.01/21
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
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ANSI.01/21
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
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ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
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ASD
ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
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ASD
ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
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ASD
ANSI.01/21
17-08-2021
ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
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ANSI.01/21
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
RUNWAY CONDITION ASSESSMENT MATRIX (RCAM)
Assessment Downgrade assessment criteria
Runway condition
code Runway surface description
Aeroplane deceleration or directional control
observation
Pilot report of runway braking
action
6 DRY ---------- ----------
5
• FROST
• WET (The runway surface is covered by any visible dampness or water up to and including 3 mm depth)
up and including 3 mm depth:
• SLUSH
• DRY SNOW
• WET SNOW
Braking deceleration is normal for the wheel braking effort applied AND directional control is normal.
GOOD
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
RUNWAY CONDITION ASSESSMENT MATRIX (RCAM)
Assessment Downgrade assessment criteria
Runway condition
code Runway surface description
Aeroplane deceleration or directional control
observation
Pilot report of runway braking
action
4
-15ºC and Lower outside air temperature:
• COMPACTED SNOW
Braking deceleration OR directional control is between Good and Medium
GOOD TO MEDIUM
3
• WET (“slippery wet” runway)
• DRY SNOW or WET SNOW (any depth) ON TOP OF COMPACTED SNOW
More than 3 mm depth:
• DRY SNOW
• WET SNOW
Higher than -15ºC outside air temperature:
• COMPACTED SNOW
Braking deceleration is noticeably reduced for the wheel braking effort applied OR directional control is noticeably reduced
MEDIUM
2
More than 3 mm depth of water or slush:
• STANDING WATER
• SLUSH
Braking deceleration OR directional control is between Medium and Poor
MEDIUM TO POOR
1 • ICE
Braking deceleration is significantly reduced for the wheel braking effort applied OR directional control is significantly reduced
POOR
0
• WET ICE
• WATER ON TOP OF COMPACTED SNOW
• DRY SNOW or WET SNOW ON TOP OF ICE
Braking deceleration is minimal to non-existent for the wheel braking effort applied OR directional control is uncertain
LESS THAN POOR
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
When no information is to be reported in item E, insert “NR” (/NR/).
Percentage of coverage of contaminants (ITEM E)
Assessed percent Reported percent
- Less than 10%; or - Runway condition is “DRY” (item G) & RWYCC = 6 (item D); or - If the percent is not reported
NR
10 - 25% 25
26 - 50% 50
31 - 75% 75
76 - 100% 100
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
When no information is to be reported in item F, insert “NR” (/NR/).
Depth assessment for contaminants
Contaminant Valid values to be reported Significant change
STANDING WATER 04, then assessed value 3 mm up to and including 15 mm
SLUSH 03, then assessed value 3 mm up to and including 15 mm
WET SNOW 03, then assessed value 5 mm
DRY SNOW 03, then assessed value 20 mm
Note 1 - For STANDING WATER, 04 (4 mm) is the minimum depth value at or above which the
depth is reported (From 3 mm and below, the runway third is considered WET).
Note 2 - For SLUSH, WET SNOW and DRY SNOW, 03 (3 mm) is the minimum depth value at and
above which the depth is reported.
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
Note 3 - Above 4 mm for STANDING WATER, and 3 mm for SLUSH, WET SNOW and DRY SNOW
an asessed value is reported and a significant change relates to observed change from the assessed
value.
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
Runway Surface Description (Item G) versus RWYCC (Item D)
Runway Surface Description (Item G) RWYCC (Item D)
DRY 6
FROST 5
WET (dampness / water up to and including 3 mm)
WET (slippery wet)
STANDING WATER (more than 3 mm)
WATER ON TOP OF COMPACTED SNOW
5
3
2
0
SLUSH (up to and including 3 mm)
SLUSH (MORW tha 3 mm)
5
2
DRY SNOW / WET SNOW (up to and including 3 mm)
DRY SNOW / WET SNOW (more than 3 mm)
DRY SNOW / WET SNOW (any depth) ON TOP OF COMPACTED SNOW
DRY SNOW / WET SNOW (any depth) ON TOP OF ICE
5
3
3
0
COMPACTED SNOW (outside temperature -15ºC or lower)
COMPACTED SNOW (outside temperature higher than -15ºC)
4
3
ICE
WET ICE
1
0
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
LFPG
12040638 08L 5/2/2 75/50/75 NR/06/06 WET/SLUSH/SLUSH 40
Repeating information in the aeroplane performance calculation section for more than one runway:
• when a SNOWTAM is reporting on more than one runway of the aerodrome for which the
SNOWTAM is issued, Items B to H (aeroplane performance calculation section) should be
repeated.
Example:
LFPG
02170135 08R 5/2/2 100/75/75 NR/06/06 WET/SLUSH/SLUSH
02170225 08C 2/3/3 75/100/100 06/12/12 SLUSH/WET SNOW/WET SNOW 35
02170245 08L 3/3/3 50/50/75 08/15/10 WET SNOW/WET SNOW/WET SNOW 40
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
4.6.6.2. Situational awareness section
LFPG
02170135 08R 5/2/2 100/75/75 NR/06/06 WET/SLUSH/SLUSH
02170225 08C 2/3/3 75/100/100 06/12/12 SLUSH/WET SNOW/WET SNOW 35
02170245 08L 3/3/3 50/50/75 08/15/10 WET SNOW/WET SNOW/WET SNOW 40
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
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The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R
ADJACENT SNOWBANKS. TWY B POOR. APRON NORTH POOR.)
Where reported, insert the measured friction coefficient and friction measuring device.
Note 1.—Elements in the situational awareness section end with a full stop.
Note 2.— Elements in the situational awareness section for which no information exists, or where
the conditional circumstances for publication are not fulfilled, are left out completely.
Note 3.— The situational awareness section shall be separated from the aeroplane performance
calculation section by an empty line.
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
Example of a complete SNOWTAM:
GG XXXX XXXX XXXX XXXX
170300 LFFAYNYX
SWLF0149 LFPG 02170245
(SNOWTAM 149
LFPG
02170135 08R 5/2/2 100/75/75 NR/06/06 WET/SLUSH/SLUSH
02170225 08C 2/3/3 75/100/100 06/12/12 SLUSH/WET SNOW/WET SNOW 35
02170245 08L 3/3/3 50/50/75 08/15/10 WET SNOW/WET SNOW/WET SNOW 40
RWY 08L REDUCED TO 2800. DRIFTING SNOW. RWY 08L LOOSE SAND. RWY 08L
CHEMICALLY
TREATED. RWY 08R SNOWBANK R20 FM CL. TWY A SNOWBANK. RWY 08R ADJACENT
SNOWBANKS.
TWY B POOR. APRON NORTH POOR.)
4.6.7. Water on runway
01150915 09R 5/5/5 100/100/100 NR/NR/NR WET/WET/WET
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
01150915 09R 5/2/2 100/50/50 NR/08/12 WET/STANDING WATER/STANDING WATER
4.6.7.1. Scenario 1
• Water 0 - 3 mm exist on runway
o Water is NOT associated with snow, slush, ice or frost
ATIS ONLY (no SNOWTAM is issued)
4.6.7.2. Scenario 2
• Water 0 - 3 mm exist on runway
o Water IS associated with snow, slush, ice or frost
SNOWTAM IS ISSUED (& ATIS)
o RCC 5 (Wet)
o RCC 3 (Slippery wet)
o 02160930 11L 5/5/5 100/50/50 NR/NR/NR WET/WET/WET
4.6.7.3. Scenario 3
• Water 4 mm or above exist on runway
o It doesn’t matter whether water is associated with snow, slush, ice or frost, or not
SNOWTAM IS ISSUED (& ATIS)
o RCC 2 (Standing water)
o 02160930 11L 2/2/2 100/50/50 05/08/13 STANDING WATER/STANDING
WATER/STANDING WATER
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ANSI.01/21
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
4.7. ATC phraseologies (ICAO PANS ATM Doc. 4444)
4.7.1. As of 4 November 2021, appropriate ATS units shall have available for transmission to
aircraft, upon request, the Runway Condition Report information. This shall be passed to
aircraft in the order of the direction of landing or take-off.
CIRCUMSTANCES Phraseologies
AERODROME INFORMATION
(applicable as of 4 November 2021)
a) [(location)] RUNWAY (number) SURFACE
CONDITION [CODE (three digit number)]
followed as necessary by:
1) ISSUED AT (date and time UTC);
2) DRY, or WET ICE, or WATER ON TOP OF
COMPACTED SNOW, or DRY SNOW, or
DRY SNOW ON TOP OF ICE, or WET SNOW
ON TOP OF ICE, or ICE, or SLUSH, or
STANDING WATER, or COMPACTED
SNOW, or WET SNOW, or DRY SNOW ON
TOP OF COMPACTED SNOW, or WET
SNOW ON TOP OF COMPACTED SNOW, or
WET, or FROST;
3) DEPTH ((depth of deposit) MILLIMETRES
or NOT REPORTED);
4) COVERAGE ((number) PER CENT or NOT
REPORTED);
5) ESTIMATED SURFACE FRICTION
(GOOD, or GOOD TO MEDIUM, or MEDIUM,
or MEDIUM TO POOR, or POOR, or LESS
THAN POOR);
6) AVAILABLE WIDTH (number) METRES;
7) LENGTH REDUCED TO (number)
METRES;
8) DRIFTING SNOW;
9) LOOSE SAND;
10) CHEMICALLY TREATED;
11) SNOWBANK (number) METRES [LEFT,
or RIGHT, or LEFT AND RIGHT] [OF or
FROM] CENTRELINE;
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
12) TAXIWAY (identification of taxiway)
SNOWBANK (number) METRES [LEFT, or
RIGHT, or LEFT AND RIGHT] [OF or FROM]
CENTRELINE;
13) ADJACENT SNOWBANKS;
14) TAXIWAY (identification of taxiway)
POOR;
15) APRON (identification of apron) POOR;
16) Plain language remarks;
b) [(location)] RUNWAY SURFACE
CONDITION RUNWAY (number) NOT
CURRENT;
c) LANDING SURFACE (condition);
d) CAUTION CONSTRUCTION WORK
(location);
e) CAUTION (specify reasons) RIGHT (or
LEFT), (or BOTH SIDES) OF RUNWAY
[(number)];
f) CAUTION WORK IN PROGRESS (or
OBSTRUCTION) (position and any necessary
advice);
g) BRAKING ACTION REPORTED BY
(aircraft type) AT (time) GOOD (or GOOD TO
MEDIUM, or MEDIUM, or MEDIUM TO
POOR, or POOR);
h) TAXIWAY (identification of taxiway) WET
[or STANDING WATER, or SNOW
REMOVED (length and width as applicable),
or CHEMICALLY TREATED, or COVERED
WITH PATCHES OF DRY SNOW (or WET
SNOW, or COMPACTED SNOW, or SLUSH,
or FROZEN SLUSH, or ICE, or WET ICE, or
ICE UNDERNEATH, or ICE AND SNOW, or
SNOWDRIFTS, or FROZEN RUTS AND
RIDGES or LOOSE SAND)];
i) TOWER OBSERVES (weather information);
j) PILOT REPORTS (weather information).
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ANSI INFORMATION LEAFLET 01/21
The use of the Enhanced Global Reporting Format (GRF) for assessing and reporting
runway surface conditions
4.7.2. Forwarding of braking action information
When receiving special air-reports by voice communications concerning braking action encountered
that is not as good as that reported, air traffic service units shall forward them without delay to the
appropriate aerodrome operator.
5. Queries
Any queries or requests for further guidance as a result of this leaflet should be addressed to:
Air Navigation Services Inspectorate section (ANSI)
Air Safety Department
Qatar Civil Aviation Authority
PO Box 3000
Doha - Qatar
E-mail: [email protected]
6. Validity and Cancelation
This Information Leaflet shall remain valid until further notice.