ICAO Annex 03 14edition supplement March 02

7/2/03

Transmittal Note

Amendment No. 1 to the SUPPLEMENT TO

ANNEX 3 — METEOROLOGICAL SERVICE FOR INTERNATIONAL AIR NAVIGATION (Fourteenth Edition)

1.

Amendment No. 1 to the Supplement to Annex 3 provides additional information received from States up to 7 February 2003 with respect to all amendments up to and including Amendment 72.

2.

To incorporate this amendment: a)

replace existing preliminary pages (iii) to (ix) and the country page for Switzerland by the attached replacement pages dated 7/2/03;

b) insert new pages for Cook Islands, Latvia and Saudi Arabia dated 7/2/03; and c)

record this amendment on page (ii) of the Supplement.

19/3/02

Transmittal Note

SUPPLEMENT TO

ANNEX 3 — METEOROLOGICAL SERVICE FOR INTERNATIONAL AIR NAVIGATION (Fourteenth Edition)

1.

The attached Supplement supersedes all previous Supplements to Annex 3 and includes differences notified by Contracting States up to 19 March 2002 with respect to all amendments up to and including Amendment 72.

2.

This Supplement should be inserted at the end of Annex 3 (Fourteenth Edition). Additional differences received from Contracting States will be issued at intervals as amendments to this Supplement.

SUPPLEMENT TO ANNEX 3 — METEOROLOGICAL SERVICE FOR INTERNATIONAL AIR NAVIGATION (Fourteenth Edition) Differences between the national regulations and practices of Contracting States and the corresponding International Standards and Recommended Practices contained in Annex 3, as notified to ICAO in accordance with Article 38 of the Convention on International Civil Aviation and the Council’s resolution of 21 November 1950.

MARCH 2002 I N T E R N AT I O N A L

CIVIL

AV I AT I O N

O R G A N I Z AT I O N

(ii)

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

RECORD OF AMENDMENTS TO SUPPLEMENT No.

Date

Entered by

1

7/2/03

ICAO

No.

Date

Entered by

AMENDMENTS TO ANNEX 3 ADOPTED OR APPROVED BY THE COUNCIL SUBSEQUENT TO THE FOURTEENTH EDITION ISSUED JULY 2001

No.

19/3/02

Date of adoption or approval

Date applicable

No.

Date of adoption or approval

Date applicable

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) 1.

(iii)

Contracting States which have notified ICAO of differences

The Contracting States listed below have notified ICAO of differences which exist between their national regulations and practices and the International Standards and Recommended Practices of Annex 3 (Fourteenth Edition), up to and including Amendment 72, or have commented on implementation.

The page numbers shown for each State and the dates of publication of those pages correspond to the actual pages in this Supplement.

State Argentina Australia Austria Belarus Canada Chile China Cook Islands Ecuador Finland France Germany Iceland India Japan Kyrgyzstan Latvia New Zealand Norway Panama Portugal Romania Russian Federation Saudi Arabia Slovakia Sweden Switzerland Trinidad and Tobago Tunisia United Kingdom United States Uruguay

Date of notification

Pages in Supplement

Date of publication

5/10/01 13/12/01 1/10/01 28/9/01 10/10/01 19/7/01 18/10/01 13/10/02 18/9/01 1/10/01 18/10/01 17/9/01 27/9/01 25/10/01 12/10/01 24/9/01 18/3/02 14/3/02 1/10/01 9/7/01 28/9/01 1/10/01 9/7/01 5/12/01 26/9/01 21/9/01 10/7/02 19/7/01 22/5/01 11/10/01 24/10/01 10/10/01

1 1-3 1 1-2 1-3 1 1 1-2 1 1 1-2 1 1 1-2 1-2 1-2 1-2 1-3 1 1 1 1 1-2 1 1 1 1-2 1 1 1-5 1-4 1

19/3/02 19/3/02 19/3/02 19/3/02 19/3/02 19/3/02 19/3/02 7/2/03 19/3/02 19/3/02 19/3/02 19/3/02 19/3/02 19/3/02 19/3/02 19/3/02 7/2/03 19/3/02 19/3/02 19/3/02 19/3/02 19/3/02 19/3/02 7/2/03 19/3/02 19/3/02 7/2/03 19/3/02 19/3/02 19/3/02 19/3/02 19/3/02

7/2/03

(iv) 2.

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) Contracting States which have notified ICAO that no differences exist

State Bahrain Barbados Denmark Dominican Republic Egypt Eritrea Ghana Jordan Lesotho Madagascar

3.

Date of notification 10/7/01 27/7/01 29/6/01 11/7/01 6/4/01 1/11/01 21/5/01 23/5/01 28/5/01 13/7/01

Date of notification

State Namibia Pakistan Singapore Sri Lanka The former Yugoslav Republic of Macedonia Togo Ukraine United Arab Emirates

4/12/01 19/7/01 1/10/01 11/10/01 18/9/01 1/7/01 25/10/01 3/9/01

Contracting States from which no information has been received

Afghanistan Albania Algeria Andorra Angola Antigua and Barbuda Armenia Azerbaijan Bahamas Bangladesh Belgium Belize Benin Bhutan Bolivia Bosnia and Herzegovina Botswana Brazil Brunei Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Cape Verde Central African Republic Chad China (Hong Kong SAR) Colombia Comoros Congo Costa Rica Côte d’Ivoire 7/2/03

Croatia Cuba Cyprus Czech Republic Democratic People’s Republic of Korea Democratic Republic of the Congo Djibouti El Salvador Equatorial Guinea Estonia Ethiopia Fiji Gabon Gambia Georgia Greece Grenada Guatemala Guinea Guinea-Bissau Guyana Haiti Honduras Hungary Indonesia Iran (Islamic Republic of) Iraq Ireland Israel Italy Jamaica Kazakhstan

Kenya Kiribati Kuwait Lao People’s Democratic Republic Lebanon Liberia Libyan Arab Jamahiriya Lithuania Luxembourg Malawi Malaysia Maldives Mali Malta Marshall Islands Mauritania Mauritius Mexico Micronesia (Federated States of) Monaco Mongolia Morocco Mozambique Myanmar Nauru Nepal Netherlands Nicaragua Niger Nigeria Oman Palau Papua New Guinea

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) Paraguay Peru Philippines Poland Qatar Republic of Korea Republic of Moldova Rwanda Saint Kitts and Nevis Saint Lucia Saint Vincent and the Grenadines Samoa San Marino Sao Tome and Principe

4.

Differences notified by

Chapter 1

Argentina Chile Sweden United Kingdom United States

2.1.5 2.2.2

Canada Cook Islands Japan Kyrgyzstan Switzerland Tunisia United Kingdom Argentina Australia Japan Switzerland Tunisia Australia Japan Switzerland United Kingdom Japan Switzerland Australia Japan Switzerland United Kingdom New Zealand

2.2.4

2.2.5 2.2.6

2.3

Senegal Serbia and Montenegro Seychelles Sierra Leone Slovenia Solomon Islands Somalia South Africa Spain Sudan Suriname Swaziland Syrian Arab Republic Tajikistan

Thailand Tonga Turkey Turkmenistan Uganda United Republic of Tanzania Uzbekistan Vanuatu Venezuela Viet Nam Yemen Zambia Zimbabwe

Paragraphs with respect to which differences have been notified

Paragraph

2.2.3

(v)

Paragraph 3.2.7 3.4.6 3.5 3.5.1 3.5.2

3.6.2 3.6.3 4.1.2 4.1.3 4.1.8

4.1.9 4.2.1 4.2.2

Differences notified by Germany Belarus Germany China Belarus Cook Islands France India Japan New Zealand Portugal United States New Zealand New Zealand United Kingdom Australia Canada Australia Canada Cook Islands New Zealand Australia Trinidad and Tobago Panama Canada France Norway Portugal

7/2/03

(vi)

4.2.3 4.2.6 4.3 4.3.1

4.3.2

4.3.3 4.3.4

4.3.9 4.4 4.5 4.5.2 4.5.5

4.5.6 7/2/03

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) Romania Russian Federation Sweden Switzerland United Kingdom United States Romania France Sweden Canada Cook Islands Ecuador Iceland Japan Latvia New Zealand Panama United Kingdom Latvia Romania Switzerland United States Australia Romania Argentina Australia Belarus Canada Cook Islands Ecuador France Germany India Japan Latvia New Zealand Panama Portugal United Kingdom United States Canada Belarus New Zealand Russian Federation Slovakia India Uruguay Belarus India Kyrgyzstan Switzerland United States Belarus

4.5.8

4.5.9

4.6.3 4.6.4

4.6.5

4.7

4.7.2 4.7.3 4.7.5

4.7.6 4.7.8 4.7.9 4.7.10 4.7.11

France Japan Kyrgyzstan Latvia United States Australia Belarus Japan Kyrgyzstan Portugal Switzerland United States Australia Belarus France Kyrgyzstan United States India Switzerland Canada Cook Islands Japan New Zealand Portugal Slovakia United Kingdom Canada Ecuador Japan Switzerland United States Australia Cook Islands Ecuador New Zealand Panama United States United States Belarus France Latvia Japan Canada Belarus Canada Germany Japan Belarus France India Latvia Slovakia United States

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) 4.7.13

4.7.14

4.7.16 4.7.18

4.8.1 4.8.2 4.8.3 4.8.4

4.8.5 4.8.6

4.8.7 4.9.3

4.9.5

4.11.1 4.11.4 4.12.1 4.12.4 4.12.5

4.12.6 4.13.1 4.13.2

Japan United Kingdom United States France Germany Slovakia France Japan Kyrgyzstan Latvia Russian Federation United Kingdom Switzerland United States France France Iceland United States United States Cook Islands France Japan New Zealand Switzerland United States Latvia Japan Latvia Switzerland Australia Cook Islands Ecuador France India Japan Latvia New Zealand Portugal Slovakia United Kingdom United States Kyrgyzstan Canada Japan Ecuador Ecuador Ecuador United Kingdom United States United Kingdom Canada United States Canada

(vii) Cook Islands Ecuador France New Zealand United States 5.2 5.4.1 5.6.3 5.7.2

5.7.3 5.7.4 5.8 5.9.1 5.9.2 5.9.3 5.9.5 5.10.1

6.2 6.2.3

6.2.4 6.2.5

6.2.7 6.2.8 6.2.9 6.2.10 6.2.11 6.2.13

Latvia Belarus United Kingdom Australia Belarus United Kingdom Belarus Belarus United Kingdom Belarus Russian Federation New Zealand Switzerland Switzerland Switzerland Cook Islands United Kingdom Russian Federation Canada Cook Islands France New Zealand Romania United Kingdom United States Austria Australia Belarus Canada Cook Islands Ecuador India New Zealand United Kingdom United States Australia Australia New Zealand Australia Australia Australia Australia Canada Cook Islands Ecuador New Zealand 7/2/03

(viii)

6.2.14 6.2.15

6.2.16

6.3

6.3.2 6.3.3 6.3.4 6.3.5 6.3.6 6.3.8 6.3.9

6.3.10 6.3.11

6.3.12

6.4

6.4.1

6.4.2 7/2/03

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) United Kingdom United States Australia United States Australia Cook Islands New Zealand United Kingdom United States Australia Kyrgyzstan Slovakia Switzerland Argentina Canada United States France Panama Australia United Kingdom Australia Australia Australia Australia Belarus Australia Belarus Cook Islands Ecuador New Zealand United Kingdom Australia Australia Cook Islands New Zealand United Kingdom Australia Belarus Cook Islands India New Zealand United Kingdom Argentina Australia Belarus Canada Switzerland United States Kyrgyzstan Latvia Russian Federation Uruguay Panama

6.5

6.5.5 6.5.6

6.5.7 6.6

6.6.1 6.6.2 6.6.3

6.6.4

7.1.1

7.2.1 7.2.3

7.2.4 7.2.5 7.3

7.3.1

Argentina Latvia New Zealand United States Kyrgyzstan Belarus Kyrgyzstan Slovakia Belarus Argentina Australia New Zealand Russian Federation India India United States Belarus Finland Germany India Kyrgyzstan Switzerland United States Belarus Canada Latvia Finland Iceland Japan Latvia Slovakia Sweden United States Canada New Zealand Australia China New Zealand United Kingdom Belarus Switzerland United States Belarus India New Zealand Panama Russian Federation Australia Finland France Switzerland United States

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) 7.4

7.4.1 7.5.1

7.5.2

7.6

7.6.1

7.6.2

7.6.4 8.1.1

8.2.1 8.2.3 8.3.1 Chapter 9 9.2.1 9.2.2 9.3.3 9.3.8 9.4.1 9.4.12 9.6.1

Belarus India New Zealand Russian Federation Canada United States Canada Finland Iceland Sweden Kyrgyzstan Latvia United Kingdom Argentina Ecuador Portugal Switzerland Canada Cook Islands Iceland New Zealand Sweden United Kingdom Belarus France Panama Belarus Saudi Arabia Switzerland Uruguay Iceland Panama Canada Latvia New Zealand Belarus Belarus Belarus India United Kingdom India Canada China India United States

(ix) 9.6.3

9.9.2 9.9.3 10.1.2 10.1.5

10.1.6 10.1.7 10.1.11 10.1.13

11.1.5 11.4 11.5

11.5.1 11.5.2 11.5.3 11.5.4 11.5.5 11.5.6 11.6 11.6.1 11.6.2 11.6.4 11.6.5 11.6.6

Latvia Panama United States Tunisia Tunisia United Kingdom Belarus India Romania Belarus Romania Belarus India Belarus Belarus India Panama Belarus Belarus United Kingdom Uruguay Sweden Belarus Belarus United Kingdom Belarus Belarus United Kingdom United Kingdom Panama Sweden Sweden United Kingdom Australia Belarus

Appendix 2

Austria Portugal Russian Federation Slovakia

Appendix 4

Austria Russian Federation

Appendix 5

Canada

7/2/03

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

ARGENTINA 1

CHAPTER 1 Definitions

Pilot-in-command. Defined as aircraft commander (pilot-in-command): The pilot responsible for the operation and safety of the aircraft during flight time, whether or not he is handling the aircraft controls.

Remark: Argentina prefers to use the term “aircraft commander” in accordance with the terminology used in its legislation (Air Code). The scope of the aircraft commander’s responsibility remains the same whether or not he is handling the controls.

CHAPTER 2 2.2.3*

The implementation of a quality control system in conformity with the ISO 9000 series of quality assurance standards is presently being studied.

CHAPTER 4 4.3.4*

The criteria for preparing special reports in the SPECI code form are determined in accordance with the meteorological minima established by the aeronautical authority for each aerodrome.

CHAPTER 6 6.3

Landing forecasts are provided exclusively at the request of the aeronautical users.

6.4

Forecasts for take-off are provided exclusively at the request of the aeronautical users.

6.5 6.6

A code form called area forecast is used nationally for area forecasts, with periods of validity of 10 hours, with a description of significant surface phenomena, forecast 0oC isotherm, icing levels, tropopauses, maximum wind, turbulence, jet stream and upper wind and upper-air temperatures from FL 030 to FL 360.

CHAPTER 7 7.6

Wind shear warnings are not issued.

* Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

AUSTRALIA 1

CHAPTER 2 2.2.3* 2.2.4* 2.2.6*

Australia does not comply with ISO 9000.

CHAPTER 4 4.1.3 4.1.8 4.1.9* 4.3.3 b)

Runway visual range is used in ATIS only.

4.3.4* a)

When the mean surface wind direction changes by 30o or more, the mean wind speed before or after the change being 20 kt or more.

b)

When the mean wind speed changes by 10 kt or more, the speed before or after the change being 30 kt or more.

e)

At aerodromes using the PANS-OPS procedures: when the horizontal visibility is at, below or passes: 1) the highest alternate visibility 2) 6 km 3) 4 km 4) 2 km 5) 1 200 m 6) 800 m.

At all other aerodromes when the horizontal visibility: — decreases to a value equal to or less than the alternate minimum; — decreases to a value equal to or less than the circling minimum; — increases to a value equal to or greater than the alternate minimum; — increases to a value equal to or greater than the circling minimum.

f)

Runway visual range is not used.

h)

At aerodromes using the PANS-OPS procedures: when a cumulative amount of BKN or more cloud is at, below or passes: a) highest alternate minimum; b) 300, 500, 1 000 ft, in further 500 ft increments up to the highest alternate minimum.

At all other aerodromes: height above official aerodrome elevation of lowest cloud of amount BKN or more, when the height: — decreases to a value equal to or less than the alternate minimum; — decreases to a value equal to or less than the circling minimum; — increases to a value equal to or greater than the circling minimum; — increases to a value equal to or greater than the alternate minimum.

i)

The total reported cloud at or below the highest alternate minimum instead of the below 450 m (1 500 ft) in Annex 3.

j)

Vertical visibility is not used.

* Recommended Practice 19/3/02

2 AUSTRALIA 4.5.8* 4.5.9* a) b)

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) Directional variations not reported.

When gusts vary from a mean speed of 15 kt or more by ± 10 kt or more.

4.7

RVR not observed or reported. Runway visual range is used in ATIS only.

4.9.5*

NSC is not used.

CHAPTER 5 5.7.2

No MET data is included in ADS reports.

CHAPTER 6 6.2.5*

Australia uses the following:

6.2.5* b) 1)

800 m , 1 200 m, 2, 4 and 6 km, the highest alternate visibility.

d) 1)

300, 500, 1 000 ft, in further 500 ft increments up to the highest alternate minimum.

g)

Vertical visibility is not reported. Australia uses in addition the following criteria: Significant Front; New expectation. No longer expected. Changes of one hour or more in expected time of passage.

Aircraft Icing or Turbulence; New expectation. Intensity increasing to moderate or severe.

Intensity decreasing from severe to light or from moderate to nil.

6.2.7* 6.2.8*

BECMG is not used.

6.2.9* 6.2.10* 6.3.4 6.3.5

Australia uses in addition the term INTER. The change indicator INTER is used only to describe changes which are expected to last for periods less than 30 minutes in each instance, and which, in the aggregate, are not expected to cover more than half the time. TEMPO defined in Australia for periods between 30 to 60 minutes.

6.2.10*

The term INTER as defined in 6.2.9 is also used in probability forecasts.

6.2.11*

FM followed by a 2 figure time group.

6.2.13*

When the visibility is less than 500 m it should be expressed in steps of 50 m; when it is 500 m or more and less than 5 km, in steps of 100 m.

6.2.14* 6.3.10

NSW is replaced by “NO SIG WX”.

6.2.15*

Vertical visibility is not forecast. NSC is not used.

* Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

AUSTRALIA 3

6.2.16*

Temperatures are forecast for 3-hourly period starting at commencement validity of the TAF with a maximum of 4 forecast values given.

6.3.3

Australia issues a Trend Type Forecast (TTF) with 3-hours validity.

6.3.4 6.3.5

Change indicators in use are FM, TEMPO and INTER. The term TILL is used to define end time of phenomena. The terms BECMG, TL and AT are not used.

6.3.6

Australia in addition to the change indicator TEMPO uses change indicator INTER (definition at 6.2.9 above). The terms FM and TL are not used with INTER/TEMPO, instead the start time and end time is used, e.g. TEMPO 1100/1400.

6.3.8 6.3.9 6.3.10 6.3.11

Australia uses the criteria for the issuing of METAR/SPECI as the basis for reporting changes in wind, visibility, weather and cloud.

6.3.11

NSC is not used.

6.3.12

Vertical visibility is not used.

6.4

TTF and TAF are used in Australia, no specific take-off forecast is issued.

6.6

Plain language area forecasts are issued in Australia.

CHAPTER 7 7.2.3*

Australia does not issue SIGMET information for volcanic ash cloud and tropical cyclones in graphical format using the WMO BUFR code form.

7.3.1

Australia issues AIRMET for cruising levels below FL 120, variance as listed below: Surface wind speed — winds of 40 kt or more within 2 000 ft of ground level.

Surface visibility — the initial onset of phenomena producing extensive areas of visibility of less than 8 km.

Cloud — the initial onset of cloud coverage of BKN or more below 1 500 ft above ground level.

CHAPTER 11 11.6.5*

Aerodrome forecasts on VOLMET have a period of validity of 12, 18 and 24 hours and are issued every 6 hours and amended as necessary.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

AUSTRIA 1

CHAPTER 6 6.2.4

Continuous review and the issuance of amendments to TAFs for the aerodromes LOWL, LOWS, LOWI, LOWG and LOWK are available during the opening hours of the aerodromes and two hours in advance of the opening of the aerodromes.

Remark: During the time aerodromes are closed, only automatic observations are prepared.

APPENDIX 2 Table 1

The inclusion of all the terms of meteorological parameters will be implemented in the beginning of 2002.

APPENDIX 2 Tables 1 & 2

The identification of the type of the report METAR, MET REPORT, TAF and TAF AMD will be done from the beginning of 2002 due to ongoing software modifications in automatic briefing systems.

APPENDIX 4 Table 1

The identification of the type of the report METAR, MET REPORT, TAF and TAF AMD will be done from the beginning of 2002 due to ongoing software modifications in automatic briefing systems.

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

BELARUS 1

CHAPTER 3 3.4.6 3.5.2 f)

Notification is not given.

CHAPTER 4

4.3.4* a), b), c)

The surface wind speed is indicated in metres per second (m/s).

e)

The visibility changes to or passes 800 or 1 500 m; such reports are not required when the runway visual range is indicated.

h), j)

30 m only for aerodromes operating in Category II.

4.4* a), b), c), d)

Not included in the agreement.

4.5.5* Note 4.5.6* 4.5.8* 4.5.9* a), b)

The surface wind speed is indicated in metres per second (m/s).

4.7.5*

Runway visual range observations are made when the visibility, measured by instruments, is 2 000 m or less at dusk and at night and 1 000 m or less during the day.

4.7.9

Runway visual range is displayed on digital data indicators in the appropriate air traffic services unit.

4.7.11*

The upper limit for assessment of runway visual range is the visibility value of 2 000 m at dusk and at night and 1 000 m during the day, converted according to special tables.

CHAPTER 5 5.4.1* 5.7.2 5.7.3 5.7.4 5.8

Not implemented due to the absence of ADS.

CHAPTER 6 6.2.5* b) 1)

150, 350, 600, 800 or 1 500 m.

6.3.8 a), b)

The surface wind speed is indicated in metres per second (m/s).

6.3.9

The visibility changes to or passes 150, 350, 600, 800 or 1 500 m.

6.3.12

The vertical visibility changes to or passes 30, 60 or 150 m.

6.4

Forecasts for take-off are not prepared.

* Recommended Practice 19/3/02

2 BELARUS

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

6.5.6 6.5.7*

The WINTEM and ROFOR code forms are not used.

6.6.3 6.6.4

Area forecasts are not issued in GAMET format.

CHAPTER 7 7.2.4

SIGMET SST information is not issued.

7.3 7.4

AIRMET information is not issued.

7.6.2* a), b), d)

Not available.

7.6.4*

There is no ground-based detection or remote-sensing equipment.

CHAPTER 9 9.2.1 c)

Forecasts for take-off are not prepared.

9.2.2* 9.3.3*

Information for supersonic aircraft is not available.

CHAPTER 10 10.1.5 10.1.6 10.1.7 b)

AIRMET information is not issued.

10.1.11*

There is no information for supersonic aircraft.

10.1.13*

AIRMET information is not issued.

CHAPTER 11 11.4 11.5

There is no aeronautical mobile service.

11.5.2* 11.5.3* 11.5.4* 11.5.5*

There is no uplink.

11.6.6*

SIGMET information is not included in VOLMET broadcasts.

* Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

CANADA 1

CHAPTER 2 2.1.5

Meteorological observations and reports are provided by employees or contractors of air navigation service providers. These personnel may not fully meet the pre-requisite knowledge and training qualifications specified by the World Meteorological Organization for meteorological personnel. The service provider must, however, demonstrate to the State meteorological authority that observer personnel are competent to make aviation weather observations accurately to WMO/ICAO specifications and to code the resulting reports accurately and within the time allotted.

CHAPTER 4 4.1.3

Special observations are not issued on changes in RVR.

4.1.8

Canada does not provide manual backups for automated systems providing weather information in support of CAT II/III operations. Cloud height indications for approach are available by relay from the meteorological station through the air traffic services unit.

4.2.2 a)

Canada does not produce local routine reports in MET REPORT format.

4.3.1 c)

No special observations are issued for changes in air temperature.

4.3.4* e)

Visibility criteria are 3, l.5, l and .05 statute miles. Additional criteria are determined specifically for each aerodrome.

h) & j)

Cloud criteria are l 500, 1 000, and 500 ft. Additional criteria are determined specifically for each aerodrome.

4.3.9

Canada does not include temperature, dew-point or QNH in SPECI, except from automated sites.

4.6.4*

Canada uses statute miles (SM) to report visibility. The term CAVOK is not used.

4.6.5*

Canada uses prevailing visibility.

4.7.8*

RVR is not available at some CAT I aerodromes.

4.7.9

RVR displays are in the air traffic services unit and do not typically exist in the meteorological station.

4.11.4*

QFE is not available in Canada.

4.13.1*

The word AUTO is included between the time of observation and the surface wind when the observing site is automated. A three-letter group will appear between the time of observation and the surface wind when the observation is corrected.

Remark: A correction to a METAR observation will be indicated by CCA (if subsequent corrections are necessary, they will be indicated by CCB and so forth).

4.13.2

The term CAVOK is not used in reports.

*Recommended Practice 19/3/02

2 CANADA

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

CHAPTER 6 6.2.3

Canada includes a remark at the end of each TAF preceded by “RMK” and followed by the scheduled issue time of the next regular TAF, in plain English. For TAFs based on automated weather observations systems, the additional remark “FCST BASED ON AUTO OBS” will be included, along with appropriate remarks, as necessary, to indicate if automated sensors are providing non-representative information.

6.2.5* b)

Criteria for the visibility are determined specifically for each aerodrome.

d)

Criteria for the clouds are determined specifically for each aerodrome.

6.2.13*

Prevailing visibility is used.

6.3 6.4

Landing and take-off forecasts are provided by the TAF.

6.6.4

GAMET area forecasts are not issued in Canada.

Remark: Area forecasts (FACN) are used in their place.

CHAPTER 7

7.2.1

Domestic SIGMET messages do not include the location indicator of the air traffic services unit or the name of the flight information region or the control area.

7.4.1

AIRMET messages do not include the location indicator of the air traffic services unit or the name of the flight information region or the control area and are only issued to amend or correct the graphical area forecast.

7.5.1

Aerodrome warnings are not issued for meteorological conditions.

Remark: The information is provided through the regular or amended aerodrome forecast.

7.6.1

Wind shear warnings are not issued. A wind shear group is included in the aerodrome forecast when significant wind shear is observed or forecast.

Remark: The wind shear group in the aerodrome forecast consists of WS, followed by the height of the wind shear in hundreds of feet, the wind speed and direction above the wind shear height.

CHAPTER 8 8.2.3*

Aerodrome climatological tables and summaries concerning RVR are not available.

CHAPTER 9 9.4.12

The information is retained by the meteorological service providers.

*Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) APPENDIX 5

CANADA 3

In Canadian SIGMETs and AIRMETs, isolated (ISOL) means spatial coverage less than one okta of the area affected. Few (FEW) means spatial coverage between one and two oktas of the area affected.

Scattered (SCT) means spatial coverage between three and four oktas of the area affected. Numerous (NMRS) or frequent (FQT) means spatial coverage greater than four oktas of the area affected.

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

CHILE 1

CHAPTER 1 Definitions

Flight crew member. Defined as a person charged with the operation, control and functioning of the aircraft or its parts, who performs essential duties during the flight duty period.

Pilot-in-command. Defined as the pilot designated by the operator in each air operation to be in command of the aircraft and to be responsible for the safe operation of a flight or part thereof.

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

CHINA 1

CHAPTER 3 3.5.1 g)

No information about the accidental release of radioactive materials into the atmosphere can be supplied.

Remark: The meteorological authority will discuss with the related organization to get the information.

CHAPTER 7 7.2.3*

The meteorological watch office could not issue SIGMET information for volcanic ash cloud and tropical cyclones in graphical format using the WMO BUFR code form.

Remark: Some time is needed to develop the new software for the WMO BUFR code.

CHAPTER 9 9.6.1 n)

No information about the accidental release of radioactive materials into the atmosphere can be supplied.

Remark: The meteorological authority will discuss with the related organization to get the information.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

COOK ISLANDS 1

CHAPTER 2 2.2.2*

Meteorological suppliers are required to establish quality assurance procedures compliant with the requirements of the Cook Islands’ Civil Aviation Rule, Part 174 or meet an equivalent standard.

CHAPTER 3 3.5.2

g)

Information on the accidental release of radioactive materials into the atmosphere is not available.

CHAPTER 4 4.1.8

Observation systems are not installed to assess runway visual range.

4.3.1

Routine observations are identified as SPECI reports when the observed conditions meet the criteria for special observations.

4.3.4*

e)

The following additional criterion is used for horizontal visibility — 8 000 m.

f)

Runway visual range is not reported.

h)

The following criteria are used for the height of the base of the lowest cloud layer or mass of BKN or OVC extent — 200 ft, 500 ft, 1 000 ft and 1 500 ft.

j)

Vertical visibility measurement is not available.

4.6.4*

The term CAVOK is not used.

4.7

Runway visual range is not reported.

4.8.6*

VC (vicinity) may be used with RA or DZ when the observer has evidence that the observed precipitation is of the type described.

4.9.5*

Vertical visibility measurement is not available.

4.13.2

The term CAVOK is not used.

CHAPTER 5 5.10.1

Forms for special air reports of volcanic activity are not made available.

CHAPTER 6 6.2.3

When the horizontal visibility is forecast to be 10 km or more, it will be coded in whole kilometres followed immediately by the letters KM, e.g. 15 KM.

* Recommended Practice

7/2/03

COOK ISLANDS 2 6.2.5*

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

b)

The following additional criterion is used for horizontal visibility — 8 000 m.

d)

The following criteria are used for the height of the base of the lowest cloud layer or mass of BKN or OVC extent — 200 ft , 500 ft, 1 000 ft and 1 500 ft.

g)

Vertical visibility forecasts are not available.

6.2.13*

When the horizontal visibility is expected to be 10 km or more, it will be coded in whole kilometres followed immediately by the letters KM, e.g., 15KM. The term CAVOK is not used.

6.2.15*

Vertical visibility forecasts are not available. The term CAVOK is not used.

6.3.9

The following criteria are used for horizontal visibility — 800 m, 1 500 m, 3 000 m, 5 000 m and 8 000 m.

6.3.11

The following criteria are used for the height of the base of the lowest cloud layer or mass of BKN or OVC extent — 200 ft, 500 ft, 1 000 ft and 1 500 ft. The term CAVOK is not used.

6.3.12

Vertical visibility measurement is not available.

CHAPTER 7 7.6.1

Information about wind shear observed on the approach or takeoff paths is included, when appropriate, in METAR and SPECI reports. Information on the expected existence of wind shear is provided.

*Recommended Practice

7/2/03

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

ECUADOR 1

CHAPTER 4 4.3.1 c)

Observations and reports are not prepared for a 2째C increase in temperature.

4.3.4* e), h), i)

Reports in SPECI code form are prepared concerning horizontal visibility and cloud amount based on the operating minima for each aerodrome.

4.6.5*

When the horizontal visibility is not the same in the direction of the approach and take-off centre lines, and one or both of their values are less than the VFR minima, the two visibilities which correspond to the approach and take-off centre lines are coded.

4.7

Runway visual range observations are not made.

4.9.5* d)

VA is also included for reporting volcanic ash cloud.

4.12.1*

Volcanic ash (VA) and cloud caused by phreatic or magmatic explosion are also included as supplementary information.

4.12.4* a)

Volcanic ash (VA) is also included.

4.12.5*

If distant cumulonimbus and/or volcanic ash cloud are observed, the position and, if possible, the direction of movement are indicated in abbreviated plain language.

4.13.2

CAVOK is not used in METAR and SPECI reports.

CHAPTER 6 6.2.5* b), 2)

At Quito, 10 km is considered for VFR flights, in addition to the value of 5 km.

6.2.13*

CAVOK is not used in forecasts in TAF code form.

6.3.9

At Quito, 10 km is considered for VFR flights, in addition to the value of 5 km.

CHAPTER 7 7.6

Wind shear observations are not made.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) GENERAL

FINLAND 1

Finland cannot comply with the modification of the codes concerning changes in the format of the METAR, SPECI and TAF endorsed by WMO Executive Council in June 2001 and to be implemented by 1 November 2001.

CHAPTER 6 6.6.3

GAMET area forecasts are not issued.

Remark: The forecast is for international use, but not widely adopted in Europe. Finland issues national area forecast and GAFOR.

CHAPTER 7 7.1.1 b)

SIGMETs are not issued concerning en route phenomena at transonic and supersonic cruising levels.

Remark: No operational requirement.

7.3.1

AIRMET information is not issued.

Remark: Finland issues national information called WXREP. This plain language message is based on pilot reports.

7.5.1

Aerodrome warnings will normally not be issued for meteorological conditions that could adversely affect aircraft on the ground, including parked aircraft.

Remark: Hitherto little requirement. Adverse meteorological conditions can be derived from other meteorological information.

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

FRANCE 1

CHAPTER 3 3.5.2 e)

AIRMET messages are not issued in France.

Remark: The relevant information appears in the low-level significant weather charts issued by France.

CHAPTER 4 4.2.2

Not in compliance with the Manual on Codes, WMO Publication No. 306, as regards the first line of reports issued in METAR code form.

Remark: Compliance will be achieved in the course of 2002.

4.2.2 b)

METAR code form reports compiled at unmanned weather stations are identified by the words METAR AUTO. Their particular characteristics are described elsewhere.

4.2.6

Information appearing in METAR AUTO messages from unmanned meteorological stations have particular characteristics that are described below.

4.3.4* e)

Reports in the SPECI code form are issued when the visibility improves and reaches or passes through 5000 m, or deteriorates and falls below that figure.

f)

RVR is not included in reports issued in the SPECI code form.

h)

Reports in the SPECI code form are issued when the height of base of the lowest cloud layer of BKN or OVC extent is lifting and reaches or passes through 450 m, or is lowering and reaches or passes through the same value.

j)

Vertical visibility is not measured.

Remark: The current sensors are not suited to this type of measurement.

4.5.6*

Local routine and special reports indicate variations in wind direction when the total variation is 60째 or more, with a mean speed above 3 kt.

Remark: As established by French air navigation authorities.

4.5.9*

In reports in the METAR/SPECI code form, variations from the mean wind direction are given if the total variation is 60째 or more, with a mean speed of over 3 kt.

4.7.5*

At some aerodromes, RVR observations are carried out at a lateral distance from the runway centre line of more than 120 m.

Remark: Compliance with measures required by the air base service of the French administration.

4.7.11*

The light intensity used to calculate RVR is the maximum intensity available on the runway in question.

4.7.14*

The lowest RVR value that can be measured in France is 75 m.

* Recommended Practice 19/3/02

2 FRANCE

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

4.7.16*

In local routine and special reports, RVR values above the maximum that can be determined by the system are reported as P1500. An RVR below the minimum that can be established by the system is reported as M0075.

4.8.3*

The proximity of present weather phenomena is not reported in the observations issued by unmanned weather stations.

4.8.4* a)

The following weather phenomena are not reported in METAR AUTO reports from unmanned weather stations: SG, PL, IC, GR, GS, DS, SS, TS, PO, FC, SA, DU, HZ, FU, VA and SQ.

4.8.6*

The label VC is not attached to METAR AUTO reports from unmanned weather stations.

4.9.5*

CBs and TCUs are not reported in observations issued by unmanned weather stations.

In observations issued by unmanned weather stations, NSC means no clouds have been detected by the ceilometer(s).

4.13.2

The abbreviation CAVOK is not used in METAR AUTO reports from unmanned weather stations.

CHAPTER 6 6.2.3

Not in compliance with the Manual on Codes, WMO Publication No. 306, as regards the first line of reports issued in the TAF code form.

Remark: Compliance will be achieved in the course of 2002.

6.3.2

Trend-type forecasts are not appended to METAR AUTO reports from unmanned weather stations.

CHAPTER 7 7.3.1

AIRMET reports are not issued.

Remark: The relevant information appears in the low-level significant weather charts issued by France.

7.6.2*

Wind shear warnings are not issued unless appropriate sensors are available.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

GERMANY 1

CHAPTER 3 3.2.7*

The forecasts of upper winds for flight level 450 (150 hPa) cannot be provided before 2005.

3.5

In Germany, selected advisory centres for aviation (ACA) fulfill the function of MWO.

CHAPTER 4 4.3.4 f)*

In Germany, values of 50 or 125, 200, 300 and 550 m instead of 150, 350 and 600 m are applied for runway visual range.

4.7.10*a) and b)

The runway visual range is determined on the basis of the maximum intensity (100 per cent) of the runway lighting.

4.7.14*

The runway visual range is determined on the basis of the maximum intensity (100 per cent) of the runway lighting.

CHAPTER 6 6.6.3

The GAMET area forecast will be probably introduced in Germany by 1 April 2002.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

ICELAND 1

CHAPTER 4 4.3.1

No special observations are issued for changes in air temperature.

4.8.4* a)

Ice crystals (IC) are reported when visibility is less than 10 km.

b)

Mist (BR) is reported when visibility is at least 1 000 m but not more than 10 km.

c)

Obscurations (lithometeors) are reported when visibility is less than 10 km, except DRSA and VA, which will be reported independent of visibility.

CHAPTER 7 7.1.1 b)

SIGMET information concerning weather phenomena at transonic levels and supersonic cruising levels is not issued.

7.5.1

Aerodrome warnings for meteorological conditions which could adversely affect aircraft on the ground will normally not be issued.

7.6.1

Wind shear warnings are not issued.

Remark: The TWR provides arriving and departing aircraft with information on wind shear observed on the approach and take-off paths. Information on the observed occurrence of wind shear at an aerodrome can be included in routine observations and reports at that aerodrome.

CHAPTER 8 8.2.1*

Aerodrome climatological tables are not prepared for Keflavik and Reykjavik.

* Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

INDIA 1

CHAPTER 3 3.5.2 e)

AIRMET services are not provided.

CHAPTER 4 4.3.4* f)

* j)

Special reports in the (SPECI) code form are not issued when the RVR changes to or passes 150 m and in a few airports when it changes to or passes 150 and 350 m.

Vertical visibility is not being reported.

4.5.2* 4.5.5*

Where automatic wind indicating instruments are used with sensors located near take-off/touchdown areas, observations from these instruments form the information for take-off/landing reports as well as for messages disseminated beyond the aerodrome; no differentiation is made between reports supplied to air traffic service units and those disseminated beyond the aerodrome.

4.6.3*

The general visibility reported in the messages issued to air traffic service units and those disseminated beyond the aerodrome is the lowest visibility observed at the aerodrome and its immediate vicinity.

However, whenever the visibility reported (lowest in any direction) is less than the minimum and the visibility in the take-off/climb out area or landing area is more than the minimum visibility required for the aircraft to take-off/land then only a supplementary information is given at the end of the plain language MET report. This supplementary information is given only when any aircraft is about to land or take-off.

4.7.11*

The lower limit for RVR instrumental observation is 270 m or 330 m at some aerodromes.

4.9.5*

Vertical visibility is not being reported.

CHAPTER 6 6.2.5* g) 6.3.12

Vertical visibility is not being reported.

6.6.1* 6.6.2 6.6.3

AIRMET services are not provided.

CHAPTER 7 7.3 7.4

AIRMET services are not provided.

CHAPTER 9 9.3.8 e) 9.4.1* f)

AIRMET services are not provided.

* Recommended Practice 19/3/02

2 INDIA 9.6.1

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) The prognostic significant weather charts are valid for an extended duration. The forecasts are valid for 1200 hrs (i.e. 03-15, 09-21, 15-03, 21-09) and the position of pressure systems refer to the mid-point of the forecast period.

CHAPTER 10 10.1.5 b) 10.1.7 b) 10.1.13*

19/3/02

AIRMET services are not provided.

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

JAPAN 1

CHAPTER 2 2.2.2* 2.2.3* 2.2.4* 2.2.5* 2.2.6*

A properly organized quality system is not established.

CHAPTER 3 3.5.2 g)

Information on the accidental release of radioactive materials into the atmosphere is not supplied to ACC/FIC and aeronautical information service units.

CHAPTER 4 4.3.1 c)

Special observations and reports due to the increase in air temperature of 2EC or more from that given in the latest report are made only when the air temperature at the observation time is 32EC or more.

4.3.4* e)

Special reports in the SPECI code form are issued when the visibility is improving and changes to or passes through one or more of the following values, or when the visibility is deteriorating and passes through one or more of the following values: 1 500, 3 200 or 5 000 m.

f)

Special reports in the SPECI code form are issued when the runway visual range is improving and changes to or passes through one or more of the following values, or when the runway visual range is deteriorating and passes through one or more of the following values: 400 or 800 m.

h)

Special reports in the SPECI code form are issued when the height of base of the lowest cloud layer of BKN or OVC extent is lifting and changes to or passes through one or more of the following values, or when the height of base of the lowest cloud layer of BKN or OVC extent is lowering and passes through one or more of the following values: 30, 180 or 450 m.

j)

Special reports in the SPECI code form are issued when the sky is obscured and the vertical visibility is improving and changes to or passes through one or more of the following values, or when the vertical visibility is deteriorating and passes through one or more of the following values: 30, 180 or 450 m.

4.5.6*

In local routine and special reports, variation in the wind direction is given if the total variation is 60o or more with mean speeds above 6 km/h (3 kt).

4.5.8*

In local routine and special reports, the name of the element is not given. This is applied to the other elements. When there is more than one runway in use, the available wind values for the representative runway are given. When a wind speed of 200 km/h (100 kt) or more is reported, it is indicated as it is.

4.5.8* a)

In local routine and special reports, wind direction is indicated as “VRB� when a variation in wind direction is 60o or more with mean wind speeds below 6 km/h (3 kt).

4.6.4*

Visibility values for each runway are not given.

* Recommended Practice

19/3/02

2 JAPAN

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

4.6.5*

In reports in the METAR/SPECI code forms, when the visibility is not the same in different directions, the prevailing visibility is reported. When the visibility is not the same in different directions and the prevailing visibility is 5 000 m or less, the visibility whose value is twice the prevailing visibility or more or 50 per cent of the prevailing visibility or less is reported. When the visibility is not the same in different directions and the prevailing visibility is more than 5 000 m, the visibility whose value is 5 000 m or less and 50 per cent of the prevailing visibility is reported.

4.7.6*

Runway visual range is reported throughout periods when either the visibility reported is in accordance with 4.6.5 or the observed runway visual range is 1 600 m or less.

4.7.10*

In local routine and special reports, the averaging period for runway visual range values is 10 minutes.

4.7.13

The reporting scale consists of increments of 50 m for runway visual range below 800 m and increments of 100 m for above 800 m.

4.7.16*

In local routine and special reports, when runway visual range is above the maximum value determined by the system in use, it is reported using the term “P”. When runway visual range is below the minimum value determined by the system in use, it is reported using the term “M”.

4.8.6*

Concerning IC, PO and FC, intensity is not reported. When a thunderstorm is observed, it is reported as “TS” regardless of its location. When a funnel cloud is observed, it is reported as “VCFC” regardless of its location.

4.9.3*

Cloud observations for local routine and special reports are representative value of the aerodrome.

4.9.5*

In local routine and special reports, cloud amount is reported using the abbreviations “FEW”, “SCT”, “BKN”, “OVC” or “SKC”. The abbreviation “NSC” is not used. The height of the base of cloud is reported in steps of 30 m (100 ft) up to 1 500 m (5 000 ft), in steps of 300 m (1 000 ft) between 1 500 m (5 000 ft) and 9 000 m (30 000 ft) and in steps of 1 500 m (5 000 ft) above 9 000 m (30 000 ft). When there is more than one runway in use, the available cloud height values for the representative runway are given.

4.11.4*

In local routine reports, QFE is not reported.

CHAPTER 7 7.1.1

SIGMET information concerning thunderstorms (OBSC TS, OBSC/EMBD/FRQ/SQL TS) icing (SEV ICE (FZRA)), mountain waves (SEV MTW), duststorms (HVY DS) and sandstorms (HVY SS) is not issued.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

KYRGYZSTAN 1

CHAPTER 2 2.2.2*

A quality verification system has not been organized

CHAPTER 4 4.5.5* 4.5.6* 4.5.8* 4.5.9*

The surface wind speed is indicated in m/s. The averaging period for wind speed observations is 2 minutes for all airports.

Remark: The metric system of units of measurement is used. Not possible due to the technical capabilities of the equipment used.

4.7.18*

The one-minute mean minimum and the one-minute mean maximum values are not reported.

Remark: Not possible due to the technical capabilities of the equipment used.

4.11.1*

At designated mountain aerodromes, pressure (QFE) is given in millimetres of mercury with a code letter M before the pressure value.

CHAPTER 6 6.2.16*

Forecasts are issued if the temperature is above the following: in winter: –30° or below in summer: +40° or above.

Remark: In accordance with the operational requirement.

6.4.1

Forecasts for take-off are not prepared.

Remark: There is no such operational requirement.

6.5.5 6.5.6 6.6.3

Minimum en-route and area pressure is forecast in area forecast in the ROFOR code form in millimetres of mercury and, where necessary, in hectopascals.

Remark: Due to the unreliability of communications with inaccessible mountains areas. In accordance with the operational requirement.

CHAPTER 7 7.5.2*

Aerodrome warnings are issued in relation with the occurrence or expected occurrence of one or more of the following phenomena and conditions: — thunderstorm — hail — snowfall of a duration of more than 2 hours — supercooled precipitation (glaze)

* Recommended Practice

19/3/02

2 KYRGYZSTAN

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) — — — —

19/3/02

squall, spout sandstorm or duststorm winds with a speed of 15 m/sec or more (considering gusts) irrespective of direction temperature drop to -30oC or lower, or an increase to +40oC or higher.

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

LATVIA 1

CHAPTER 4 4.3.1 c)

Special observations and reports due to the increase in air temperature of 2º C are not issued. Special reports are made only when the air temperature increases to +30º C or above or when the air temperature falls to –30º C or below.

4.3.2

All special observation reports are prepared as local special reports.

4.3.4* e), f) and g)

Visibility, RVR and cloud criteria are determined specifically for each aerodrome.

4.5.6*

Variations from the mean wind speed (gusts) during the past 10 minutes are reported only as the maximum speed attained.

4.7.5*

At Liepaja aerodrome, runway visual range observations are carried out at a lateral distance of 200 m and 160 m from the runway centerline.

4.7.11* a) and b)

RVR is determined on the basis of the maximum intensity (100 per cent) of the runway lighting.

At Liepaja aerodrome, meteorological visibility value readings of the transmissometer, daytime and twilight, are taken as RVR values. At night, meteorological visibility range measured with a transmissometer (100 per cent light intensity used) is converted to a low intensity range according to a special table.

4.7.18* b)

At Liepaja aerodrome, the one-minute mean maximum and mean minimum values of RVR are not reported due to inadequate technical capabilities of the meteorological equipment being used.

4.8.7*

In reports in abbreviated plain language, only the light and heavy intensity of the weather phenomena is used.

4.9.3*

At Riga aerodrome, cloud observations are made near the touchdown zone of the runways.

4.9.5*

In reports in abbreviated plain language, NSC (no significant clouds) is used when: — the visibility is less than 10 km; — there are no clouds below 5 000 ft and no cumulonimbus (CB) or towering cumulus (TCU) clouds.

CHAPTER 5 5.2 a)

Routine aircraft observations during en-route and climb-out phases of the flight are not made.

CHAPTER 6 6.4.1

Forecasts for take-off are not prepared.

6.5

Area and route forecasts, other than forecasts issued within the framework of the world area forecast system are not prepared.

6.6.4

Area forecasts for low-level flights are issued every 3 hours in daytime only.

* Recommended Practice

7/2/03

LATVIA 2

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

CHAPTER 7 7.1.1 b)

SIGMET messages regarding the occurrence and/or expected occurrence of specified en-route weather phenomena at transonic and supersonic cruising levels are not issued.

7.5.2*

Aerodrome warnings are issued when at the aerodrome one or several of the following phenomena is expected: — — — — —

strong surface wind and gusts (more than 30 kt); squall; freezing precipitation; heavy snow (visibility less than 1 000 m during more than 2 hours); air temperature falling to –30 C or below or increasing up to +30 C or above.

CHAPTER 8 8.3.1*

Aerodrome climatological summaries for Riga aerodrome are available for the period 1992-1996. For Liepaja aerodrome the climatological summaries are not available.

CHAPTER 9 9.6.3*

In the significant weather charts for low-level (SWL, example 1), the altitude is indicated in hectofeet above ground level.

*Recommended Practice

7/2/03

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

NEW ZEALAND 1

CHAPTER 2 2.3

Operators requiring meteorological service shall notify the meteorological service provider.

CHAPTER 3 3.5.2 b)

SIGMET information is issued for the New Zealand FIR and for the Auckland Oceanic FIR north of latitude 500S. SIGMET information is provided for notified operations within the Auckland Oceanic FIR between latitudes 500S and 600S.

e)

AIRMET information is not available.

g)

Information on the accidental release of radioactive materials into the atmosphere is not available.

3.6.2*

The aviation colour code is not included in volcanic advisory information issued by the Wellington VAAC.

3.6.3*

Volcanic advisory information is not issued in graphical format.

CHAPTER 4 4.1.8

Observation systems are not installed to measure runway visual range.

4.3.1

Reports of routine observations are identified as SPECI reports when the observed conditions meet the criteria used for special observations.

4.3.4* e)

The following criteria are used for horizontal visibility: 800, 1 500, 3 000, 5 000 and 8 000 m.

f)

Runway visual range is not reported for precision approach runways. Runway visual range observations are only made for specific take-off operations at approved aerodromes, using a human observer system.

h)

The following criteria are used for the height of the base of the lowest cloud layer or mass of BKN or OVC extent — 200 (at selected aerodromes), 500, 1 000 and 1 500 ft.

j)

Vertical visibility is not available.

4.4* f)

Ground weather radar is not currently available to the ATS authority.

4.6.4*

The term CAVOK is not used.

4.7

Runway visual range is not reported for precision approach runways. Runway visual range observations are only made for specific take-off operations at approved aerodromes, using a human observer system.

4.8.6*

VC (vicinity) may be used with RA, DZ or SN when the observer has evidence that the observed precipitation is of the type described.

4.9.5*

Vertical visibility is not available.

* Recommended Practice.

19/3/02

2 NEW ZEALAND 4.13.2

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) The term CAVOK is not used.

CHAPTER 5 5.9.1

Forms of special air-reports of volcanic activity are not available. However, a volcanic activity report form is available for use by pilots.

CHAPTER 6 6.2.3

When the horizontal visibility is expected to be 10 km or more, it will be coded in whole kilometres followed immediately by the letters km, e.g. 15 km.

6.2.5* b)

The following criteria are used for horizontal visibility — 800, 1 500, 3 000, 5 000 and 8 000 m.

d)

The following criteria are used for the height of the base of the lowest cloud layer or mass of BKN or OVC extent — 200 (at selected aerodromes), 500, 1 000 and 1 500 ft.

g)

Vertical visibility forecasts are not available.

6.2.8*

When the horizontal visibility is expected to be 10 km or more, it will be coded in whole kilometres followed immediately by “KM”, e.g. 15 KM.

6.2.13*

The term CAVOK is not used.

6.2.15*

Vertical visibility forecasts are not available. The term CAVOK is not used.

6.3.9

The following criteria are used for horizontal visibility — 800, 1 500, 3 000, 5 000 and 8 000 m.

6.3.11

The following criteria are used for the height of the base of the lowest cloud layer or mass of BKN or OVC extent — 200 (at selected aerodromes), 500, 1 000 and 1 500 ft. The term CAVOK is not used.

6.3.12

Vertical visibility forecasts are not available.

6.5

Route forecasts are issued in a self-evident plain language form.

6.6

Area forecasts in the GAMET format are not available.

CHAPTER 7 7.2.1

In SIGMETs issued for the New Zealand FIR, the date-time groups are given in both local time and UTC.

7.2.3*

SIGMET information for volcanic ash and tropical cyclones are not issued in graphical format.

7.3 7.4

AIRMET information is not available.

* Recommended Practice.

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) 7.6.1

NEW ZEALAND 3

Information about wind shear observed on the approach or take-off paths is included, when appropriate, in METAR and SPECI reports. Information on the expected existence of wind shear is not provided.

CHAPTER 9 General

The type, the format and the means and the point of supply of meteorological information to operators and flight crew members are as agreed between the meteorological service provider and the operator or flight crew member.

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

NORWAY 1

CHAPTER 4 4.2.2 b)

The issuance of local routine meteorological reports has not been implemented.

Remark: No requirements identified .

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

PANAMA 1

CHAPTER 4 4.2.1

Only routine observations are made throughout the 24 hours at the Tocumen International Airport.

4.3.1 c)

No special observation is formulated regarding change of temperature.

4.3.4*

All reports of special observations are prepared as selected special reports.

4.7

No observation of runway visual range (RVR) is made.

CHAPTER 6 6.3.2

Landing forecasts are not prepared; aerodrome forecasts are used for this purpose.

6.4.2*

Forecasts for take-off are not prepared on a regular basis; they are only prepared upon request.

CHAPTER 7 7.3

AIRMET information is only issued locally, upon request.

7.6.2*

Wind shear warnings are only issued when evidence of the existence of wind shear is derived from aircraft observations.

CHAPTER 8 8.2.1*

Aerodrome climatological tables are only prepared for Tocumen and Paitilla aerodromes.

CHAPTER 9 9.6.3*

Significant weather charts are not prepared for low-level flights.

CHAPTER 11 11.1.5

Telecommunications at meteorological offices and ATS dependencies are made by telephone.

11.6

VOLMET broadcasts are not prepared.

* Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

PORTUGAL 1

CHAPTER 3 3.5.2 e)

AIRMET messages are not prepared, supplied and disseminated.

Remark: Software not available.

CHAPTER 4 4.2.2

MET REPORT/SPECIAL will be issued as METAR/SPECI in abbreviated plain language.

Remark: Expected to be implemented by December 2002.

4.2.2 Note 1

Meteorological information used in ATIS is extracted from the METAR/SPECI. Remark: Expected to be implemented by December 2002.

4.3.4* f)

In the criteria of RVR for reports in SPECI code form, improving and deteriorating conditions will have the same treatment, e.g. the treatment corresponding to improving RVR. Remark: Expected to be implemented by 1 May 2002.

4.5.8*

Wind speeds of more than 100 kt will not be reported as ABV99kt. It is reported with the three corresponding digits.

Remark: Expected to be implemented by June 2002.

4.6.4*

Visibility will be expressed in steps of 100 m for values observed in the range 500 to 800 m.

Remark: Expected to be implemented by June 2002.

4.9.5*

Abbreviation “NSC� will not be available.

Remark: Expected to be implemented by June 2002.

CHAPTER 7 7.6

Wind shear warnings are not available for approach and take-off paths.

Remark: No detection equipment available.

APPENDIX 2 Table A2-2

The new bulleting format will not be available.

Wind speed gusts of more than 100 kt will be reported with three digits instead of P99 kt.

Remark: Expected to be implemented by June 2002.

* Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

ROMANIA 1

CHAPTER 4 4.2.2 4.2.3 4.3.2 4.3.3

Not applied.

Remark: Compliance by September 2002.

CHAPTER 6 6.2.3 a)

Not applied.

Remark: Compliance by September 2002

CHAPTER 10 10.1.5 10.1.6

Not applied.

Remark: Compliance by September 2002

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

RUSSIAN FEDERATION 1

CHAPTER 4 4.2.2

Information on the state of the runway is provided to the meteorological service by the appropriate airport unit and is included in the METAR weather report after the “trend forecast�.

4.5

The unit used to measure surface wind speed is metres per second (m/s) in METARs and SPECIs. Remark: The Russian Federation uses the metric system of measurement.

4.7.18*

The one-minute mean maximum and mean minimum RVR values are indicated only at aerodromes certified for Category I, II and/or III operations.

Remark: The relevant meteorological equipment does not exist at other aerodromes.

CHAPTER 5 5.8

Information on atmospheric meteorological parameters is not transmitted in automated air-reports.

Remark: There is no appropriate instrumentation.

CHAPTER 6

6.2

The unit used to measure surface wind speed is metres per second (m/s) in TAFs. Remark: The Russian Federation uses the metric system of measurement.

6.4.1

Forecasts for take-off are prepared only at the request of the aircraft flight crew.

Remark: National practice.

6.6

Area forecasts are in GAMET format. Plain language is used with accepted abbreviations (local area, flight area and ATS region forecasts).

Remark: This difference is predicated upon the national operational requirements.

CHAPTER 7 7.3 7.4

Plain language is used in AIRMET information with accepted abbreviations (local area, flight area and ATS region forecasts).

Remark: This difference is predicated upon the national operational requirements.

APPENDIX 2 Tables A2-1 and A2-2

The unit used to measure surface wind speed is metres per second (m/s) in METARs and SPECIs. Remark: The Russian Federation uses the metric system of measurement.

* Recommended Practice

19/3/02

2 RUSSIAN FEDERATION

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

Table A2-2

Information on the state of the runway is provided to the meteorological service by the appropriate airport unit and is included in the METAR weather report after the “trend forecast”.

Table A2-4

Wind direction is included in a routine and special report taking into account the magnetic deviation of the aerodrome.

Remark: This difference is predicated upon the national operational requirements.

APPENDIX 4 Table A4-1

19/3/02

The unit used to measure surface wind speed is metres per second (m/s) in TAFs.

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

SAUDI ARABIA 1

CHAPTER 8 8.1.1

Aerodrome climatological tables and aerodrome climatological summaries are not provided to aeronautical users.

Remark. — Climatological information is available for most aerodromes in the Kingdom, but these climatological data need to be processed and stored in a suitable form for the preparation of climatological tables.

7/2/03

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

SLOVAKIA 1

CHAPTER 4 4.5

The unit used for wind speed is metres per second. The abbreviation “MPS” or an indication of the unit is used in all reports.

4.6.4*

When the visibility is less than 500 m it is expressed in steps of 50 m; when it is 500 m or more but less than 5 km, in steps of 100 m.

4.7.11* 4.7.14*

RVR is determined on the basis of the maximum intensity (100 per cent) of the runway lighting.

4.9.5*

The abbreviation NSC is not used.

CHAPTER 6

The unit used for wind speed is metres per second. The abbreviation “MPS” is used in all forecasts.

6.2.16*

The forecast of minimum and maximum temperatures is not included in the aerodrome forecast.

6.5.6

Area and route forecasts in code form WINTEM and ROFOR are not used in Slovakia.

CHAPTER 7 7.1.1 b)

SIGMET information at transonic and supersonic levels is not issued.

APPENDIX 2 Table A2-1

The abbreviation “CLD” is not used in local reports.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

SWEDEN 1

CHAPTER 1 Definitions

The definition for visibility will be revised in our regulations in 2002.

CHAPTER 4 4.2.2 a)

Minimum wind is not included in MET REPORT and SPECIAL. Remark: Will be revised in our regulations in 2004.

4.3

SPECI is not issued in Sweden.

Remark: METAR is issued every half hour.

CHAPTER 7 7.1.1 b)

SIGMET information is not issued concerning en-route weather phenomena at transonic levels and supersonic cruising levels.

7.5.1

Aerodrome warnings will normally not be issued for meteorological conditions that could adversely affect aircraft on the ground, including parked aircraft.

7.6.1

Due to limited capacity for maintaining a continuous survey of wind shear conditions, wind shear warnings are not issued. Information on the observed occurrence of wind shear at an aerodrome is included in routine observations and reports issued at that aerodrome.

Remark: Not included in Swedish regulations due to the absence of severe wind shear conditions.

CHAPTER 11 11.5.1 11.6.1 11.6.2

SPECI is not issued in Sweden.

Remark: METAR is issued every half hour.

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

SWITZERLAND 1

CHAPTER 2 2.2.2* 2.2.3* 2.2.4* 2.2.5* 2.2.6*

A properly organized quality system in conformity with the International Organization for Standardization (ISO 9000) has not yet been established.

CHAPTER 4 4.2.2

a)

Reports of routine observations are not yet issued in accordance with the templates in Annex 3.

4.3.2

a)

Reports of special observations are not yet issued in accordance with the templates in Annex 3.

b)

Special reports in the SPECI code form are not issued at LSZH and LSGG (routine observations are made at intervals of 30 minutes).

b)*

The averaging period for wind observations for local routine and special reports is 10 minutes.

4.5.5 4.5.8*

Variable wind (VRB) is reported when the variation is 60° or more and the wind speed is 3 kt or less.

4.6.3*

There are no special visibility observations for all take-off/climb-out areas and all approach/landing areas.

4.6.5*

When the visibility is not the same in every direction, the “prevailing visibility” is reported.

4.8.1*

At Zurich airport the present weather information in local routine and special reports is representative for the aerodrome and its immediate vicinity, but is not representative for all take-off/climb-out areas and all approach/landing areas.

4.8.6*

At Zurich airport “VCTS” is not reported.

4.9.3*

At Zurich airport cloud observations in local routine and special reports are representative for the aerodrome and its immediate vicinity, but are not representative for all take-off/climb-out areas and all approach/landing areas.

CHAPTER 5 5.9.2

The routine air-reports received by voice communications are not disseminated to WAFCs or RAFCs.

5.9.3

Special air-reports received by voice communications are not transmitted to WAFCs or RAFCs.

5.9.5

Special air-reports are not transmitted to meteorological watch offices.

CHAPTER 6 6.2.16*

The forecast temperatures included in the TAF are related to fixed time values and not to maximum and minimum values.

* Recommended Practice 7/2/03

2 SWITZERLAND 6.4 6.6.3

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) Take-off forecasts are not provided, some information is given by the TAF.

h)

In the GAMET forecast, areas of surface visibility below 5 000 m are not issued.

j)

In the GAMET forecast, mountain obscurations are not issued.

q)

In the GAMET forecast, pressure centres and fronts are not issued.

r)

In the GAMET forecast, upper winds at 2 000 ft are not issued.

CHAPTER 7 7.2.4

SIGMET information for supersonic aircraft (SIGMET SST) is not issued.

7.3.1

In the AIRMET messages, information about areas of surface visibility below 5 000 m, mountain obscurations, and widespread areas of broken or overcast cloud is not issued.

7.6

Wind shear warnings are only issued at Zurich airport.

CHAPTER 8 8.1.1

7/2/03

Regularly updated aerodrome climatological tables and summaries are not available.

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

TRINIDAD AND TOBAGO 1

CHAPTER 4 4.1.9*

No automated equipment to assess RVR is installed at Piarco and Crown Point Airports.

Remark: Visibility rarely falls below 8 km year round.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

TUNISIA 1

CHAPTER 2 2.2.2* 2.2.3*

No compliance.

Remark: Compliance expected by 2003 or 2004.

CHAPTER 9 9.9.2* 9.9.3

No compliance.

Remark: Compliance expected by 2003 or 2004.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION) GENERAL

UNITED KINGDOM 1

The United Kingdom is making efforts to comply with Annex 3 Amendment 72. However, due to the requirement to make major software changes, compliance with certain provisions will not take place before 2 April 2002.

CHAPTER 1 Definitions

In United Kingdom legislation, “Pilot-in-command� in relation to an aircraft means a person who for the time being is in charge of the piloting of the aircraft without being under the direction of any other pilot in the aircraft.

Remark: This difference will be maintained.

CHAPTER 2 2.2.2* 2.2.4* 2.2.6*

The establishment and implementation of a quality system is currently being carried out by the MET service provider. This is expected to be completed by July 2002.

Remark: The MET service provider is in the process of establishing and implementing a quality system.

CHAPTER 4 4.1.2*

The United Kingdom has established a number of meteorological stations on off-shore structures that produce fully automated observations. However, these observations do not meet the requirements of ICAO Annex 3.

Remark: Awaiting developments in fully automated observing systems and then approval for operational use by ICAO and United Kingdom regulatory bodies. Compliance expected by 2010.

4.2.2

Reports in the METAR format may omit the identification of the type of report (as mandated in Appendix 2 to Amendment 72) until 31 July 2002.

Remark: Major software changes are required to comply with this provision. Also it should be noted that the United Kingdom will not comply with the METAR bulletin format until further guidance is issued.

4.3.1 c)

Special reports for changes in temperature are not issued.

Remark: Consultation on the requirements for special reports for changes in temperature will be carried out in 2002 with a view to introducing this in 2004. Aviation industry currently has no stated requirement for special reports for changes in temperature.

4.3.4*

Due to the requirement to make major software changes, compliance will not take place until 2 April 2002.

4.3.4 e)*

Additional visibility thresholds of 2 000 m, 5 000 m (irrespective of numbers of VFR flights) and 10 km are used.

Remark: Additional visibility thresholds of 150, 350 and 600 m will be used where an RVR is not available, by local arrangement at each aerodrome.

* Recommended Practice 19/3/02

2 UNITED KINGDOM

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

f)

Special reports for RVR will only be prepared by local arrangement at each aerodrome.

h)

Additional cloud base thresholds of 300, 700, 1 500 ft (irrespective of numbers of VFR flights) and 2 000 ft for cloud layers of BKN or OVC extent are used.

i)

Special reports for cloud are made when the amount of a cloud layer at or below 1500 ft changes: 1) from SKC, FEW or SCT to BKN or OVC; or 2) from BKN or OVC to SKC, FEW or SCT.

j)

Observations of vertical visibility are not made.

Remark: There are no plans to introduce the reporting of vertical visibility in the foreseeable future due to regulatory and aviation industry requirements.

4.6.4*

The incremental steps used for visibility in local routine and special reports will be 50 m up to 450 m, 100 m between 500 m and 4 900 m, and 1 km between 5 000 m and 9 km.

Remark: From 2 April 2002, the incremental steps used for visibility in local routine and special reports will be 50 m up to 750 m, 100 m between 800 m and 4 900 m, and 1 km between 5 000 m and 9 km.

4.7.13

The incremental steps used for runway visual range will be 25 m up to 175 m, 50 m between 200 m and 750 m and 100 m for RVR greater than or equal to 800 m.

Remark: From 2 April 2002, the incremental steps used for runway visual range will be 25 m up to 375 m, 50 m between 400 m and 800 m, and 100 m for RVR greater than 800 m.

4.7.18*

RVR trends and significant variations are not reported.

Remark: There are no plans to introduce RVR trends and significant variations in the foreseeable future due to regulatory and aviation industry requirements.

4.9.5*

Observations of vertical visibility, of whether the cloud base is diffuse, ragged or fluctuating rapidly are not made.

Remark: There are no plans in the foreseeable future to introduce the reporting of vertical visibility or to provide information on whether the cloud base is diffused, ragged or fluctuating rapidly. This is due to regulatory and aviation industry requirements.

4.12.5*

Information on wind shear is not added to METAR reports due to difficulties with information systems handling such information.

Remark: A review of the requirement for information on wind shear in METAR reports will be carried out in 2002.

4.12.6*

Ten-minute automated reports from equipment located on some off-shore structures contain information on the state of the sea (specifically mean wave height, maximum wave height and wave period).This information is available in the associated meteorological forecast office.

Remark: A review of whether information on sea-surface temperature and the state of the sea should be included in reports in the METAR/SPECI code forms reports will be carried out in 2002 in conjunction with the operators concerned.

* Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

UNITED KINGDOM 3

CHAPTER 5 5.6.3*

Pilots encountering wind shear are requested to make a report even if wind shear has been previously forecast or reported.

5.7.2 5.7.4

Turbulence and humidity data are not yet available.

Remark: Awaiting further developments in field specifications. Time scale unknown.

5.10.1

Forms for special air-reports of volcanic activity are not provided. Pilots are expected to use Item 13 of the standard air report form for such reports.

Remark: No change to this policy is expected in the foreseeable future. Incidents are infrequent and standard air-reports containing this information will ensure that the information is passed on to the appropriate authorities.

CHAPTER 6 6.2.3

Reports in the TAF format may omit the identification of the type of report until 31 July 2002.

Remark: Major software changes are required to comply with this provision.

6.2.5* b)

Additional visibility thresholds of 5 000 m (irrespective of numbers of VFR flights) and 10 km are used.

Visibility thresholds of 150, 600 and 3 000 m are not used. However visibility thresholds of 3 000 m and 7 km are used additionally for ten civil aerodromes serving off-shore helicopter operations.

Remark: Due to regulatory and aviation industry requirements.

d)

Additional cloud base thresholds of 1 500 ft (irrespective of numbers of VFR flights) and 5 000 ft for cloud layers of BKN or OVC extent are used. Cloud base threshold of 100 ft is not used. An additional threshold of 700 ft is used for ten civil aerodromes serving off-shore helicopter operations.

Remark: Due to regulatory and aviation industry requirements.

e)

A change or amend criteria is reached when the amount of a cloud layer at or below 1500 ft changes: 1) from SKC, FEW or SCT to BKN or OVC; or 2) from BKN or OVC to SKC, FEW or SCT.

g)

Forecasts of vertical visibility are not issued.

Remark: There are no plans to introduce the forecasting of vertical visibility in the foreseeable future due to regulatory and aviation industry requirements.

6.2.13*

The incremental steps used for visibility in forecasts will be 50 m up to 450 m, 100 m between 500 m and 4 900 m, and 1 km between 5 000 m and 9 km.

Remark: From 2 April 2002, the incremental steps used for visibility in forecasts will be 50 m up to 750 m, 100 m between 800 m and 4 900 m, and 1 km between 5 000 m and 9 km.

* Recommended Practice

19/3/02

4 UNITED KINGDOM 6.2.15* 6.3.12

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

Forecasts of vertical visibility are not issued.

Remark: There are no plans to introduce the forecasting of vertical visibility in the foreseeable future due to regulatory and aviation industry requirements.

6.3.3

Only cloud below 5 000 ft or below the highest minimum sector altitude, whichever is greater, is included in UK TREND forecasts (except cumulonimbus clouds, which are always indicated).

Remark: Pilots have requested concise TREND statements; information on cloud above 5 000 ft serves no useful purpose in TREND forecasts.

6.3.9

Visibility threshold of 5 000 m is used irrespective of numbers of VFR flights.

Remark: Regulatory and aviation industry requirements.

6.3.11

The cloud base threshold of 1 500 ft will be used irrespective of numbers of VFR flights, for cloud layers of BKN or OVC extent. An additional cloud base threshold of 300 ft will be used. An additional threshold of 700 ft will be used for ten civil aerodromes serving offshore helicopter operations.

A change or amend criteria is reached when the amount of a cloud layer at or below 1 500 ft changes: 1) from SKC, FEW or SCT to BKN or OVC; or 2) from BKN or OVC to SKC, FEW or SCT; Remark: Due to regulatory and aviation industry requirements.

CHAPTER 7 7.2.3*

SIGMET information for volcanic ash cloud is not issued in a graphical format using the WMO BUFR code form.

Remark: States need to agree to the format before any such information for volcanic ash cloud is issued in a graphical form.

7.5.2*

Aerodrome warnings are not issued for tropical cyclone, duststorm, sandstorm, rising sand or dust.

Additional aerodrome warnings are issued for fog.

Remark: There are no plans to change the warnings in the foreseeable future as a result of aviation industry requirements.

7.6.1

A wind shear alerting service is provided at some airports. When certain criteria are met, a wind shear warning is issued even if there have been no aircraft reports. Alerts are also issued based on recent pilot reports of wind shear on the approach or climb-out. The alert message is given in the arrival and departure ATIS broadcasts and/or by Radio Transmission to arriving and departing aircraft in one of three formats: a) b) c)

WINDSHEAR FORECAST (WSF) WINDSHEAR FORECAST AND REPORTED (WSFR) WINDSHEAR REPORTED (WSR).

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

UNITED KINGDOM 5

CHAPTER 9 9.3.8 g) & h)

In some flight briefing areas the meteorological satellite images or mosaics and/or nephanalyses and ground-based weather radar information are not routinely displayed.

Remark: Due to data bandwidth constraints, it is not always possible to display satellite images and weather radar images.

CHAPTER 10 10.1.2*

The associated meteorological office may not necessarily be located at an aerodrome.

CHAPTER 11

11.5

Currently the United Kingdom has implemented, on an operational trial basis, an en-route ATIS Service.

This service is currently restricted to METARs. Remark: Operational trial at present.

11.5.3* 11.5.6*

The United Kingdom does not currently support the data link of SIGMETs. Remark: Operational trial is restricted to METARs at present.

11.5.5*

The United Kingdom does not currently support the data link of TAFs. Remark: Operational trial is restricted to METARs at present.

11.6.4*

The VOLMET system will delete METARs after a configurable period.

Remark: This is to reduce any risk that data could remain on the system for 24 hours and be interpreted by users as current data.

* Recommended Practice

19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

UNITED STATES 1

CHAPTER 1 Definitions

Pilot-in-command. The United States does not abide by the definition for pilot-in-command. The owner of a general aviation aircraft may not be the pilot in command, especially under leasing agreements.

Visibility. United States does not follow the practice under b) for determining visibility. Visibility is based on an unfocused light of 25 candelas.

CHAPTER 3 3.5.2 g)

The United States does not provide information on location, date, time and forecast trajectories of radioactive material released into the atmosphere.

CHAPTER 4 4.2.2 a)

The United States does not provide local routine reports. At aerodromes with departure and arrival control, wind and altimeter information is provided verbally by the controller.

4.3.2 a)

The United States does not provide local special reports.

4.3.4* a)

Practices require SPECI for wind shift when wind direction changes by 45E or more in less than 15 minutes and the wind speed is 10 kt or more throughout the wind shift.

b)

Practices do not require SPECI for increases of mean surface wind speed.

c)

Practices require SPECI for squall, where squall is defined as a strong wind characterized by a sudden onset in which the wind speed increases by at least 16 kt and is sustained at 22 kt or more for at least one minute.

d)

Practices do not require SPECI for wind direction changes based on local criteria.

f)

SPECI not prepared for the equivalents in feet of 150, 350 and 600 m. United States military stations may not report a SPECI based on RVR. SPECI is made when the highest value from the designated RVR runway decreases to less than, or if below, increases to equal to or exceeds 2 400 ft during the preceding 10 minutes.

g)

Practices do not require SPECI for the onset, cessation or change in intensity of: freezing fog; moderate or heavy precipitation (including showers thereof); low drifting dust, sand or snow; blowing dust, sand or snow (including snowstorm); duststorm or sandstorm. SPECI is made when referenced weather phenomena cause changes in the visibility, ceiling or sky condition which meet criteria for SPECI.

h) and j)

Practices do not require SPECI when the height of the lowest BKN or OVC cloud layer or vertical visibility changes to or passes 100 ft (30 m) unless an approach minimum exists. SPECI is made when the ceiling (rounded off to reportable values) forms or dissipates below, decreases to less than, or if below, increases to equal to or exceeds 3 000, 1 500, 1 000 and 500 ft, the lowest standard instrument approach procedure minimum published in the National Ocean Survey (NOS) U.S. Terminal Procedures. If none published, then 200 ft.

* Recommended Practice

19/3/02

2 UNITED STATES

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

4.5.5* a)

The United States practice is to provide a 2-minute average wind observation for the METAR/SPECI.

4.5.6* 4.5.9* a)

Practice is to use a 6 kt criterion for average wind speed to report variable wind direction in METAR and SPECI. The United States uses a 3 kt criterion for wind speed to forecast variable wind direction in TAF.

4.5.8*

The United States does not provide wind for specific runways but wind representative for the airport.

4.5.9* b)

Practices define wind gust as rapid fluctuations in wind speed with a variation of 10 kt or more between peaks and lulls. Wind speed data for the most recent 10 minutes is examined and a gust, the maximum instantaneous wind speed during that 10-minute period, is reported if the definition above is met during that period.

4.6.5*

Practice is to report prevailing visibility. Prevailing visibility is defined as the visibility that is considered representative of visibility conditions at the station (automated observation), or the greatest distance seen throughout at least half the horizon circle, not necessarily continuous (manual observation). Sector visibility, defined as the visibility in a specified direction that represents at least a 45 degree arc of the horizon circle, may be reported.

4.7.2

Practice is to report only the touchdown zone.

4.7.3

Practice is to report RVR for a designated runway.

4.7.11*

RVR values in the METAR/SPECI code forms are reported in feet (FT) and are based on light setting 5 (highest available) for the designated instrument runway. RVR tendency is not reported.

4.7.13

Practice is to report RVR in increments of 100 ft up to 1 000 ft, increments of 200 ft from 1 000 ft to 3 000 ft, and increments of 500 ft above 3 000 ft to 6 000 ft.

4.8.2*

The following weather elements are augmented manually at designated automated station observation sites: FC, TS, GR, GS and VA. At selected airports, additional present weather elements may be provided.

With the exception of volcanic ash, present weather is reported when prevailing visibility is less than 7 statute miles or considered operationally significant. Volcanic ash is always reported when observed.

4.8.4*

The practice is not to report the following weather phenomena at unstaffed stations in METAR or SPECI: DZ , PL, IC, SG, GR, GS, SA, DU, FU, VA, PY, PO, SQ, FC, DS and SS.

4.8.5*

The practice is not to report the following characteristics of present weather phenomena in METAR or SPECI: SH, DR, MI, BC and PR at unstaffed stations.

4.8.6*

The practice with respect to the proximity indicator VC is between 5 to 10 statute miles from the point of observation with the exception of precipitation for which VC indicates > 0 to 10 statute miles from the point of observation.

4.9.5*

The United States reports only up to 3 layers at automated sites and up to 6 layers at manual sites. Cloud layer amounts are a summation of layers at or below a given level, utilizing cumulative cloud amount. In addition, at automated sites which are unstaffed, cloud layers about 12 000 ft are not reported. At staffed automated sites, clouds above 12 000 ft may be augmented. CAVOK, SKC, and NSC are not used.

4.12.5*

The United States does not provide wind shear in the METAR/SPECI code form.

* Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

UNITED STATES 3

4.13.1*

Practices require the inclusion of a modifier field to designate AUTO for totally automated observations (no human augmentation) or COR for corrected observations between the date and time of the report and the surface wind direction and speed.

4.13.2

The United States does not use the term CAVOK in meteorological reports.

CHAPTER 6 6.2.3

At selected military aerodromes, practice is to forecast for the 5 and 6 groups, turbulence and icing and the lowest expected altimeter setting.

6.2.5* b)

Change groups and amendment criteria below 1/2 statute mile (800 m) are not used.

d)

The 100 ft (30 m) change group and amendment criterion are not used.

6.2.13*

Forecast visibility increments used consist of 1/4 mile from 0 (zero) to 1 mile, 1/2 mile from 1 to 2 miles and 1 mile above 2 miles.

6.2.14*

Practices require the forecast of non-convective low-level wind shear within 2 000 ft of the ground in the Optional Group. The forecast consists of WS (wind shear); height of the wind shear in hundreds of feet and wind speed and direction above the wind shear height, using METAR and TAF coding regulations.

6.2.15*

The United States does not use the terms CAVOK and NSC in meteorological forecasts.

6.3 6.4

Landing and take-off forecasts are provided by the TAF.

6.5

Upper winds and upper-air temperatures are not included in area forecasts. Tabular wind and temperature forecasts are available in separate products.

6.6.2 6.6.3

Area forecasts are issued 3 times a day in the United States, with the exception of Alaska and Hawaii where they are issued 4 times a day. They are valid for a 12-hour period beginning 1 hour after issuance and have an 18-hour outlook. Area forecasts are not issued in the GAMET format, but are in abbreviated language.

6.6.3 i)

Practice is not to include thunderstorms information in area forecasts.

CHAPTER 7 7.1.1

SIGMETs issued for conterminous United States for convection includes convection at levels lower than the criterion in a). Bulletins are issued hourly including “NIL” when required. Convective SIGMETs for the conterminous United States are issued with the non-standard WMO header designator “WST”.

Practice is to issue SIGMET for mountain waves only when accompanied by severe turbulence.

7.2.5

SIGMET messages are issued by alphanumeric series, e.g. Kilo 1, 2, 3 etc. In conterminous United States convective SIGMETs are issued in lieu of SIGMETs for convection. They are issued hourly as bulletins for East, Central and Western United States thus they do not indicate the FIR. Convective SIGMETs have an outlook section.

* Recommended Practice 19/3/02

4 UNITED STATES

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

7.3.1

Practices do not include cloud amount or type in AIRMET. Practice is to issue AIRMET for information included in the area forecast, not just for information occurring or forecast to occur which has not been included in area forecast. The United States issues AIRMET denoting areas of IFR and MVFR based on either ceiling or visibility criteria.

7.4.1

AIRMETs in the conterminous United States are issued as bulletins for East, West and Central in conjunction with area forecast turbulence, icing, and ceiling and visibility, thus do not comply with template for FIR or series numbering format.

CHAPTER 9

9.6.1 9.6.3*

Practices do not require reporting of ISOL, OCNL or FRQ in accordance with the guidance on the use of the terms given in Attachment F. The United States reports isolated (ISOL) to mean the phenomenon affects an area less than approximately 3 000 square miles or is widely separated in time, and widespread (WDSPR) to mean more than 50 per cent of area.

* Recommended Practice 19/3/02

SUPPLEMENT TO ANNEX 3 (FOURTEENTH EDITION)

URUGUAY 1

CHAPTER 4 4.5.2*

The surface wind observations are not representative of the following aerodromes: Colonia, Rivera and Salto.

Remark: Compliance by 15 October 2002 depending on the existence of financial resources.

CHAPTER 6 6.4.1

Forecasts for take-off are prepared upon request.

Remark: Requests are not regular.

CHAPTER 8 8.1.1

The aeronautical climatological information is not complete.

Remark: The applicable information is at the stage of being studied. Compliance by 15 March 2002.

CHAPTER 11 11.5

D-VOLMET service does not exist.

Remark: Compliance to be determined.

* Recommended Practice

19/3/02