AIR NAVIGATION COMMISSION

Transcription

1 International Civil Aviation Organization AN-WP/9187 3/1/18 WORKING PAPER AIR NAVIGATION COMMISSION APPROVAL OF DRAFT REPORT TO COUNCIL ON AMENDMENT 78 TO ANNEX 3 (Item No ) (Presented by the Direct of the Air Navigation Bureau) (42 pages) ANB,AN.2018.WP.9187.en.docx SUMMARY This paper presents a draft rept to Council f Amendment 78 to Annex 3 Meteological Service f International Air Navigation. The amendment proposal concerns: a) introduction of space weather advisy infmation services, improvement of the provision of SIGMET infmation by meteological watch offices (MWOS), infmation on the release of radioactive material into the atmosphere, SIGMET and AIRMET infmation, introduction of IWXXM, and aeronautical meteological personnel qualification and competency, education and training; and b) consequential amendment concerning change of references related to the provision of aeronautical infmation service. Action by the Air Navigation Commission is in paragraph 2. AMO, AOI, OPS COORDINATION REFERENCES Amendment concerning introduction of space weather advisy infmation services, improvement of the provision of SIGMET infmation by meteological watch offices (MWOS), infmation on the release of radioactive material into the atmosphere, SIGMET and AIRMET infmation, introduction of IWXXM, and aeronautical meteological personnel qualification and competency, education and training AN-WP/9148 and Add. No. 1 and DP No. 1 AN-WP/9098.PDP AN-WP/9098 and DP No. 1 AN Min AN Min Annex 3 State letter AN 10/1-17/41 Consequential amendment concerning change of references related to the provision of aeronautical infmation service AN-WP/9157 and DP No. 1 AN-WP/9068.PDP AN Min AN Min

2 AN-WP/ AN-WP/9068 and DP No. 1 AN Min Annex 3 State letter AN 2/ /22 Principal references 1. INTRODUCTION 1.1 During its 206th Session, the Air Navigation Commission conducted final reviews of proposed amendments relating to Annex 3 Meteological Service f International Air Navigation. The Commission agreed that the proposed amendments, as contained in the State letters referenced in the summary box above and as modified by the Commission, be consolidated f inclusion in Amendment 78 to Annex 3. The development and review of the proposed amendments, along with proposed applicability dates are presented in detail in the attached draft rept to Council. 2. ACTION BY THE AIR NAVIGATION COMMISSION 2.1 The Air Navigation Commission is invited to approve the attached draft rept to Council concerning Amendment 78 to Annex 3.

3 International Civil Aviation Organization WORKING PAPER C-WP/xxxx ANC Rept../../18 COUNCIL 213TH SESSION Subject No : International Standards and Recommended Practices (SARPs) ADOPTION OF AMENDMENT 78 TO ANNEX 3 (Presented by the President of the Air Navigation Commission) EXECUTIVE SUMMARY This paper presents a proposal of the Air Navigation Commission f Amendment 78 to Annex 3 Meteological Service f International Air Navigation. The amendment proposal concerns: a) introduction of space weather advisy infmation services, improvement of the provision of SIGMET infmation by meteological watch offices (MWOS), infmation on the release of radioactive material into the atmosphere, SIGMET and AIRMET infmation, modifications of IWXXM representations of infmation, aeronautical meteological personnel qualification and competency, education and training; and b) a consequential amendment concerning change of references related to the provision of aeronautical infmation service. Having examined the technical circumstances associated with the implementation of the amendment, the Air Navigation Commission considers that an effective date of July 2018 and a proposed applicability date of 8 November 2018 would be suitable f Amendment 78 to Annex 3, except f the provisions listed below : 1) 7 November 2019: f the element concerning modifications of IWXXM representations of infmation; and 2) 5 November 2020: f the element concerning IWXXM as a Standard. Action: The Commission recommends that the Council: a) adopt, as Amendment 78 to Annex 3, the amendments to definitions and to Standards and Recommended Practices as contained in Appendix C to this paper; b) approve, as part of the said amendment, the amendment to notes and attachments as contained in Appendix C to this paper; c) approve the Resolution of Adoption in Appendix D to this paper; d) approve, as part of the said amendment, the amendment to the Fewd of Annex 3 as contained in Appendix E to this paper; and e) note the incpation of Amendment 77-B with proposed Amendment 78 in a new, consolidated edition of Annex 3 as described in paragraph 5.1 of this paper. Strategic Objectives: This wking paper relates to the Safety and Air Navigation Capacity and Efficiency Strategic Objectives.

4 C-WP/xxxx Financial implications: References: States: The space weather provider States will have significant costs in the establishment and subsequent provision of space weather services, at least over the initial three years where there may not be a regional cost recovery mechanism. The cost to States to implement IWXXM will increase to various extents, depending on prevailing State capabilities. The other components of this proposal do not have significant financial implications. Industry: Some limited costs associated with software changes can be expected to accommodate new and modified infmation requirements. However, significant efficiencies would be expected through the operational use of the new infmation provided on space weather and through the integration of meteological infmation to the system-wide infmation management environment. AN-WP/9187 AN Min. 207-xx Annex 3 F all other references, please refer to paragraph INTRODUCTION 1.1 This rept deals with a proposal of the Air Navigation Commission f the amendment of Annex 3 Meteological Service f International Air Navigation arising from the following sources: a) recommendations developed by the second meeting of the Meteology Panel (METP/2); and b) recommendations developed by the twelfth meeting of the AIS-AIM Study Group (AIS-AIMSG/12). 2. BACKGROUND 2.1 The development and review of the proposed amendment has followed the established process, as shown in the table below: Amendment concerning Introduction of space weather advisy infmation services; improvement of the provision of SIGMET infmation by meteological watch offices (MWOS); infmation on the release of radioactive material into the atmosphere; SIGMET and AIRMET infmation; modifications of IWXXM representations of infmation; and Preliminary review by ANC and WP no. 9 March 2017 (ANC 204-9) AN-WP/9098 and DP No. 1, AN-WP/9098.PDP State letter and date AN 10/1-17/ April 2017 Final review by the ANC and WP no. 2 November 2017 (ANC 206-7) AN-WP/9148, Addendum No. 1 and Discussion Paper No. 1 No. of replies at final review 1 67 Contracting States (24) 4 int. gs Total: 71 replies

5 - 3 - C-WP/xxxx Amendment concerning aeronautical meteological personnel qualification and competency, education and training Consequential amendment concerning change of references related to the provision of aeronautical infmation service Preliminary review by ANC and WP no. 1 December 2016 (ANC 203-6) AN-WP/9068 and DP No. 1 AN-WP/9068 PDP State letter and date AN 2/ / April 2017 Final review by the ANC and WP no. 14 and 16 November 2017 (ANC and 12) AN-WP/9157 and Discussion Paper No. 1 No. of replies at final review 1 64 Contracting States (23) 5 int. gs Total: 69 replies 1 Number in parenthesis is the number of Council Member States who have replied. 2 Proposal also includes consequential amendments to Annex 15 Aeronautical Infmation Services, Procedures f Air Navigation Services ICAO Abbreviations and Codes (PANS-ABC, Doc 8400) and Procedures f Air Navigation Services Air Traffic Management (PANS-ATM, Doc 4444). 3 Proposal also includes Annex 15 Aeronautical Infmation Services, introduce the new Procedures f Air Navigation Services Aeronautical Infmation Management (PANS-AIM), consequential amendments to Annex 4 Aeronautical Charts, Annex 6 Operation of Aircraft, Part I International Commercial Air Transpt Aeroplanes, Annex 9 Facilitation, Annex 10 Aeronautical Telecommunications, Volume I Radio Navigation Aids and Volume II Communication Procedures including those with PANS status, Annex 11 Air Traffic Services, Annex 14 Aerodromes, Volume I Aerodrome Design and Operations and Volume II Helipts, Procedures f Air Navigation Services Air Traffic Management (PANS-ATM, Doc 4444), Procedures f Air Navigation Services Aircraft Operations, Volume I Flight Procedures and Volume II Construction of Visual and Instrument Flight Procedures (PANS-OPS, Doc 8168), Procedures f Air Navigation Services ICAO Abbreviations and Codes (PANS-ABC, Doc 8400) and Procedures f Air Navigation Services Aerodromes (PANS-Aerodromes, Doc 9981). 2.2 The Commission has agreed that the amendments listed in the table above be presented to the Council f inclusion in Amendment 78 to Annex 3 and thus recommends to the Council to take action as stated in the executive summary. 3. RATIONALE, IMPLEMENTATION ISSUES AND COST IMPACT 3.1 Introduction of Space Weather Advisy Infmation Service Rationale The amendment proposal introduces Standards and Recommended Practices (SARPs) f a space weather infmation service which will suppt international air navigation. The suggested introduction of these new SARPs is the culmination of a process initiated by Recommendation 1/20 c) of the Meteology (MET) Divisional Meeting (Montréal, 9 to 27 September 2002), continued by the subsequent wk of ICAO and WMO which, over the years, wked together in maturing a proposal f a new requirement which was confirmed in December 2011 by IATA. The introduction of Space Weather Advisy Infmation Service was developed as a follow up to Recommendation 2/7 of the Meteology (MET) Divisional Meeting (Montréal, 7 to 18 July 2014). The space weather proposals are consistent with the Global Air Navigation Plan (GANP) (Doc 9750) and are suppted by a process f the assessment of prospective providers of space weather infmation, the establishment of providers and the further development of higher resolution infmation over time.

6 C-WP/xxxx Implementation issues The SARPs f a space weather infmation service will be suppted by the issuance of the Manual on Space Weather Infmation (Doc xxxx) to be developed to assist the implementation process by 8 November Cost impact The Provider States will have significant costs in the establishment and subsequent provision of space weather services, at least over the initial three years where there may not be a regional cost recovery mechanism. However, on the positive side efficiency enhancements will reduce industry costs. 3.2 Improvement of the provision of SIGMET infmation by meteological watch offices (MWOs) Rationale The amendment proposal adds a note to Annex 3, Chapter 3, 3.4.1, regarding the guidance to meteological watch offices in bilateral and multilateral cooperation and codination f the provision of SIGMET infmation messages to address user needs f better harmonization of the provision of en-route hazardous weather infmation. Implementation issues No implementation issues are expected f this provision except f the need of an increased codination between meteological watch offices f the provision of SIGMET messages. Cost impact The implementation of this provision will not have a significant cost impact. 3.3 Infmation on the release of radioactive material into the atmosphere Rationale The amendment proposal introduces changes to Annex 3 to allow f the provision of SIGMET and AIRMET messages to contain a cylindrical description of the airspace affected. The proposed provision has an associated note to aid meteological watch offices in the provision of the SIGMET messages f a radioactive cloud considering the recommendations of the International Atomic Energy Agency (IAEA). Implementation issues No implementation issues are expected regarding this provision. Cost impact The implementation of this provision will not have an associated cost impact except f the introduction of min software changes which are considered negligible.

7 - 5 - C-WP/xxxx 3.4 SIGMET and AIRMET infmation and presentation of infmation about tropical cycles Rationale The amendment proposal would enable the use of TEST EXER qualifiers in test messages f volcanic ash and tropical cyclone advisy as well as in SIGMET and AIRMET infmation. These provisions would remove the potential f ambiguity that may arise between operational messages and those messages issued during communications tests (e.g. TEST) volcanic ash and tropical cyclone contingency exercises (e.g. EXER) Additionally the amendment contains proposals to amend Annex 3 that would enable greater clarity in the presentation of infmation about tropical cyclones (TC) (Annex 3, Table A2-2 Template f advisy message f tropical cyclones) with regard to their advisy number, observation time, TC centre position, and associated observed cumulonimbus (CB) cloud. These proposals are reflected in proposals f related changes in SIGMET infmation (Annex 3, Table A6-1A Template f SIGMET and AIRMET messages) as well as with the remediation of missing cloud level utility and area description with reference to FIR and UIR. Implementation issues No implementation issues are expected regarding these provisions except f the training needs. This training requirement would be minimal. Cost impact The implementation of this provision will not have an associated cost impact except f the addition of min software changes. 3.5 Introduction of IWXXM Rationale The amendment proposal contains provisions to amend Annex 3 that extend the use of the ICAO Meteological Infmation Exchange Model (IWXXM) to facilitate the exchange of meteological observations and repts (METAR/SPECI), aerodrome fecasts (TAF), SIGMETs, AIRMETs, and volcanic ash and tropical cyclone advisy infmation, in a system-wide infmation management (SWIM)-compliant environment. The current provisions allow those States with the capability to begin using IWXXM to exchange meteological infmation in such a manner. From November 2020, the exchange of infmation in IWXXM fmat (in addition to the traditional alphanumeric code) is proposed to become a Standard and the primary means f the exchange of international MET infmation. Implementation issues F IWXXM, the transition is staged and makes allowance f some States to defer full implementation. An extended period of time that will accommodate these States will be enabled as necessary. It is anticipated that most States will implement, within reasonable timeframes, as the advantages of doing so become clear.

8 C-WP/xxxx Cost impact The cost to States to implement IWXXM will increase to various extents, depending on prevailing State capabilities. However, the proposal lays the foundation f me effective provision and use of me extensive meteological infmation. The efficiency of aircraft operations is enhanced with me timely access to and incpation of digital meteological infmation in flight planning, flow management and aircraft management. 3.6 Aeronautical meteological personnel qualification and competency, education and training Rationale The proposal would provide greater clarity with regard to the qualification and competency, education and training of personnel engaged in the provision of meteological service f international air navigation (i.e. aeronautical meteological personnel). The proposal brings the ICAO provisions in line with the requirements of the Wld Meteological Organization (WMO) in this regard. Implementation issues No implementation issues are expected regarding this provision. Cost impact The implementation of this provision will not have an associated cost impact. 3.7 Consequential amendment concerning change of references related to the provision of aeronautical infmation service Rationale The amendment proposal is a consequential amendment to the proposed restructuring of Annex 15 and the proposed new PANS-AIM which refers only to the update of references to Annex 15 and PANS-AIM. Implementation issues No implementation issues are expected regarding this provision. Cost impact The implementation of this provision will not have an associated cost impact. 4. EFFECTIVE AND APPLICABILITY DATES 4.1 The Air Navigation Commission, having examined the technical circumstances associated with the implementation of the amendment, considers that an effective date of July 2018 and a proposed applicability date of a) 8 November 2018 f implementation of the provisions concerning introduction of space weather advisy infmation services, improvement of the provision of SIGMET infmation by meteological watch offices (MWOS), infmation on the release of radioactive material

9 - 7 - C-WP/xxxx into the atmosphere and aeronautical meteological personnel qualification and competency, education and training; b) 7 November 2019 f the provisions concerning modifications of IWXXM representations of infmation; and c) 5 November 2020 f the provision concerning the IWXXM as a Standard would be suitable f Amendment 78 to Annex EDITORIAL ADJUSTMENT 5.1 In der to provide States with a comprehensive edition of Annex 3, Amendment 77-B (adopted by the Council on 22 February 2016 and applicable 5 November 2020) will be consolidated with the proposed Amendment 78 in a new edition of the Annex. In so doing, the provisions of Amendment 77-B will be adjusted editially to feature the 2019 and 2020 applicability dates at the beginning of each affected provision. Claude Hurley

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11 C-WP/xxxx Appendix A English only APPENDIX A IMPLEMENTATION TASK LIST AND OUTLINE OF GUIDANCE MATERIAL IN RELATION TO AMENDMENT 78 TO ANNEX 3 1. IMPLEMENTATION TASK LIST 1.1 Essential steps to be followed by a State in der to implement the proposed amendment to Annex 3: a) identification of the rule-making process necessary to transpose the new and modified ICAO provisions into the national regulation; b) establishment of a national implementation plan that takes into consideration the new and modified provisions; c) drafting of the amendment(s) to the national requirements and means of compliance; d) filing of State differences with ICAO, if necessary; e) establishment of Space Weather Centres by those selected States; f) development of software modifications f disseminating METAR/SPECI, TAF, SIGMET, AIRMET, volcanic ash advisies and tropical cyclone advisies in digital fm; g) training of operational staff in the provision and use of new infmation; h) testing of software encoding, decoding and the communications infrastructure f the exchange of digital infmation both nationally and as part of the global exchange within regional requirements; and i) operational acceptance of software changes. 2. STANDARDIZATION PROCESS 2.1 Effective date: July Applicability date: 8 November Embedded applicability dates: 7 November 2019 f the element concerning modifications of IWXXM representations of infmation; and 5 November 2020 f the provision concerning the IWXXM as a Standard.

12 C-WP/xxxx Appendix A A-2 3. SUPPORTING DOCUMENTATION 3.1 ICAO documentation Title Manual on Aeronautical Meteological Practice (Doc 8896) Manual on the Digital Exchange of Aeronautical Meteological Infmation (Doc 10003) Manual on Space Weather Infmation (Doc ####) Type Planned (PANS/TI/Manual/Circ) publication date Manual October 2018 Manual October 2018 Manual October External documentation Title External Organization Publication date Manual on Codes (WMO-No. 306) WMO May 2018 Suppting documentation to No. 306 WMO May to July IMPLEMENTATION ASSISTANCE TASKS Type Global Regional Wkshops IWXXM and Space Weather f all the ICAO Regions. 5. UNIVERSAL SAFETY OVERSIGHT AUDIT PROGRAMME (USOAP) 5.1 The content of this paper may require an amendment of the USOAP continuous moniting approach (CMA) protocol questions in the area of air navigation services (ANS) to assess effective implementation by States. Existing protocol questions may need amendment new protocol questions may be required. This will be assessed during the next amendment cycle of the protocol questions.

13 C-WP/xxxx Appendix B English only APPENDIX B IMPACT ASSESSMENT IN RELATION TO AMENDMENT 78 TO ANNEX 3 1. INTRODUCTION 1.1 Amendment 78 to Annex 3 is intended to: a) introduce basic initial provisions f space weather advisy infmation services in response to user needs expressed by IATA as no infmation of any kind is currently available to assist operats in assessing the risks associated with space weather events; b) extend the use of the ICAO Meteological Infmation Exchange Model (IWXXM) to facilitate the exchange of meteological observations and repts (METAR/SPECI), aerodrome fecasts (TAF), SIGMETs, AIRMETs, and volcanic ash and tropical cyclone advisy infmation, in a system wide infmation management (SWIM) compliant environments; and c) introduce improvement of the provision of SIGMET infmation by meteological watch offices (MWOS), infmation on the release of radioactive material into the atmosphere, SIGMET and AIRMET infmation and aeronautical meteological personnel qualification and competency, education and training; and b) consequential amendment concerning change of references related to the provision of meteological service. 2. IMPACT ASSESSMENT 2.1 Safety impact: The safety of aircraft operations is enhanced with access to improved infmation on current and expected atmospheric conditions. Improved infmation about space weather events that may affect communications, navigation and surveillance systems utilized by the aviation industry will lead to improved decision-making, particularly in the planning phase, to mitigate the potential impacts of space weather events on aircraft operations. 2.2 Financial impact: The space weather provider States will have significant costs in the establishment and subsequent provision of space weather services, at least over the initial three years where there may not be a regional cost recovery mechanism. The cost to States to implement IWXXM will increase to various extents, depending on prevailing State capabilities. The other components of this proposal do not have significant financial implications. 2.3 Financial impact: Industry Some limited costs associated with software changes can be expected to accommodate new and modified infmation requirements. However, significant efficiencies would be expected through the operational use of the new infmation provided on space

14 C-WP/xxxx Appendix B B-2 weather and through the integration of meteological infmation to the system-wide infmation management environment. 2.4 Security impact: No security impact with the implementation of this proposal. 2.5 Environmental impact: Implementation of these provisions has no environmental impact. 2.6 Efficiency impact: The efficiency of aircraft operations is enhanced with me timely access to and incpation of digital meteological infmation in flight planning, flow management and aircraft management. Improved infmation about space weather events will improve route selection and fuel-loading decisions and minimize the need f rerouting flights due to the potential impacts of space weather events. 2.7 Expected implementation time: The expected implementation dates of 7 November 2019 f the element concerning modifications of IWXXM representations of infmation and 5 November 2020 f the element concerning IWXXM as a Standard are intended to enable WMO to develop the suppting data models and to allow sufficient time f full implementation by States.

15 C-WP/xxxx Appendix C APPENDIX C PROPOSED AMENDMENT TO ANNEX 3 NOTES ON THE PRESENTATION OF THE PROPOSED AMENDMENT 1. The text of the amendment is arranged to show deleted text with a line through it and new text highlighted with grey shading, as shown below: Text to be deleted is shown with a line through it. New text to be inserted is highlighted with grey shading. Text to be deleted is shown with a line through it followed by the replacement text which is highlighted with grey shading. text to be deleted new text to be inserted new text to replace existing text 2. The sources of the proposed amendments have been indicated as follows: Source Annotation Second meeting of the Meteology Panel (METP/2) Source A Twelfth meeting of the AIS-AIM Study Group (AIS-AIMSG/12) Source B

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17 C-1 C-WP/xxxx Appendix C INTERNATIONAL STANDARDS AND RECOMMENDED PRACTICES METEOROLOGICAL SERVICE FOR INTERNATIONAL AIR NAVIGATION ANNEX 3 TO THE CONVENTION ON INTERNATIONAL CIVIL AVIATION PART I. CORE SARPs CHAPTER 1. DEFINITIONS 1.1 Definitions SOURCE A ICAO meteological infmation exchange model (IWXXM). A data model f representing aeronautical meteological infmation. Space weather centre (SWXC). A centre designated to monit and provide advisy infmation on space weather phenomena expected to affect high-frequency radio communications, communications via satellite, GNSS-based navigation and surveillance systems and/ pose a radiation risk to aircraft occupants. Note. A space weather centre is designated as global and/ regional. SOURCE B CHAPTER 2. GENERAL PROVISIONS 2.1 Objective, determination and provision of meteological service Each Contracting State shall designate the authity, hereinafter referred to as the meteological authity, to provide to arrange f the provision of meteological service f international air navigation on its behalf. Details of the meteological authity so designated shall be

18 C-WP/xxxx Appendix C C-2 included in the State aeronautical infmation publication, in accdance with Annex 15, Chapter 5 Appendix 1, GEN 1.1. Note. Detailed specifications concerning presentation and contents of the aeronautical infmation publication is provided in PANS-AIM (Doc 10066), Appendix 2. SOURCE A Each Contracting State shall ensure that the designated meteological authity complies with the requirements of the Wld Meteological Organization (WMO) in respect of qualifications, and competencies, education and training of meteological personnel providing service f international air navigation. Note. Requirements concerning the qualifications, and competencies, education and training of meteological personnel in aeronautical meteology are given in the Technical Regulations (WMO-No. 49), Volume I General Meteological Standards and Recommended Practices, Part V Qualifications and Competencies of Personnel Involved in the Provision of Meteological (Weather and Climate) and Hydrological Services, Part VI Education and Training of Meteological Personnel, and Appendix A Basic Instruction Packages. CHAPTER 3. WORLD AREA FORECAST SYSTEM AND METEOROLOGICAL OFFICES GLOBAL SYSTEMS, SUPPORTING CENTRES AND METEOROLOGICAL OFFICES 3.4 Meteological watch offices A Contracting State, having accepted the responsibility f providing air traffic services within a flight infmation region (FIR) a control area (CTA), shall establish, in accdance with regional air navigation agreement, one me MWOs, arrange f another Contracting State to do so. Note. Guidance on the bilateral multilateral arrangements between Contracting States f the provision of meteological watch office services, including f cooperation and delegation, can be found in the Manual of Aeronautical Meteological Practice (Doc 8896). 3.8 Space weather centres (SWXC) A Contracting State, having accepted the responsibility f providing a SWXC, shall arrange f that centre to monit and provide advisy infmation on space weather phenomena in its area of responsibility by arranging f that centre to: a) monit relevant ground-based, airbne and space-based observations to detect, and predict when possible, the existence of space weather phenomena that have an impact in the following areas:

19 C-3 C-WP/xxxx Appendix C 1) high frequency (HF) radio communications; 2) communications via satellite; 3) GNSS-based navigation and surveillance; and 4) radiation exposure at flight levels; b) issue advisy infmation regarding the extent, severity and duration of the space weather phenomena that have an impact referred to in a); c) supply the advisy infmation referred to in b) to: 1) area control centres, flight infmation centres and aerodrome meteological offices in its area of responsibility which may be affected; 2) other SWXCs; and 3) international OPMET databanks, international NOTAM offices and aeronautical fixed service Internet-based services SWXC shall maintain a 24-hour watch In case of interruption of the operation of a SWXC, its functions shall be carried out by another SWXC another centre, as designated by the SWXC Provider State concerned. Note. Guidance on the provision of space weather advisy infmation, including the ICAOdesignated provider(s) of space weather advisy infmation, is provided in the Manual on Space Weather in Suppt of International Air Navigation (Doc ####). CHAPTER 9. SERVICE FOR OPERATORS AND FLIGHT CREW MEMBERS 9.1 General provisions Meteological infmation supplied to operats and flight crew members shall be up to date and include the following infmation, as agreed between the meteological authity and the operats concerned: i) meteological satellite images; and j) ground-based weather radar infmation.; and

20 C-WP/xxxx Appendix C C-4 k) space weather advisy infmation relevant to the whole route. 9.3 Flight documentation Note. The requirements f the use of automated pre-flight infmation systems in providing flight documentation are given in Flight documentation to be made available shall comprise infmation listed under a) 1) and 6), b), c), e), f) and, if appropriate, g) and k). However, flight documentation f flights of two hours duration less, after a sht stop turnaround, shall be limited to the infmation operationally needed, as agreed between the meteological authity and the operat concerned, but in all cases it shall at least comprise infmation on b), c), e), f) and, if appropriate, g) and k). SOURCE B 9.4 Automated pre-flight infmation systems f briefing, consultation, flight planning and flight documentation Recommendation. Automated pre-flight infmation systems providing f a harmonized, common point of access to meteological infmation and aeronautical infmation services infmation by operats, flight crew members and other aeronautical personnel concerned should be as agreed between the meteological authity and the civil aviation authity the agency to which the authity to provide service has been delegated in accdance with Annex 15, c). Note. The meteological and aeronautical infmation services infmation concerned is specified in 9.1 to 9.3 and Appendix 8 and in Annex 15, 8.1 and 8.2PANS-AIM, 5.5, respectively. SOURCE A PART II. APPENDICES AND ATTACHMENTS APPENDIX 2. TECHNICAL SPECIFICATIONS RELATED TO WORLD AREA FORECAST SYSTEM GLOBAL SYSTEMS, SUPPORTING CENTRES AND METEOROLOGICAL OFFICES (See Chapter 3 of this Annex)

21 C-5 C-WP/xxxx Appendix C 3. VOLCANIC ASH ADVISORY CENTRES 3.1 Volcanic Ash Advisy Infmation Recommendation. Until 4 November 2020, Volcanic ash advisy centres (VAACs) should issue volcanic ash advisy infmation should be disseminated in digital IWXXM GML fm in addition to the issuance of this advisy infmation in abbreviated plain language in accdance with As of 5 November 2020, volcanic ash advisy infmation shall be disseminated in IWXXM GML fm in addition to the issuance of this advisy infmation in accdance with Note. The technical specifications f IWXXM are contained in the Manual on Codes (WMO-No. 306), Volume I.3, Part D Representation Derived from Data Models. Guidance on the implementation of IWXXM is provided in the Manual on the ICAO Meteological Infmation Exchange Model (IWXXM) (Doc 10003) Volcanic ash advisy infmation, if disseminated in digital fm, shall be fmatted in accdance with a globally interoperable infmation exchange model and shall use extensible markup language (XML)/geography markup language (GML) Volcanic ash advisy infmation, if disseminated in digital fm, shall be accompanied by the appropriate metadata. Note. Guidance on the infmation exchange model XML/GML and the metadata profile is provided in the Manual on the Digital Exchange of Aeronautical Meteological Infmation (Doc 10003). 5. TROPICAL CYCLONE ADVISORY CENTRES 5.1 Tropical Cyclone Advisy Centres The advisy infmation on tropical cyclones disseminated in abbreviated plain language, using approved ICAO abbreviations and numerical values of self-explanaty nature, shall be in accdance with the template shown in Table A Recommendation. Until 4 November 2020, Tropical cyclone advisy centres should issue tropical cyclone advisy infmation should be disseminated in digital IWXXM GML fm in addition to the issuance of this advisy infmation in abbreviated plain language in accdance with As of 5 November 2020, tropical cyclone advisy centres shall disseminate tropical cyclone advisy infmation in IWXXM GML fm in addition to the dissemination of this advisy infmation in abbreviated plain language in accdance with

22 C-WP/xxxx Appendix C C-6 Note. The technical specifications f IWXXM are contained in the Manual on Codes (WMO-No. 306), Volume I.3, Part D Representation Derived from Data Models. Guidance on the implementation of IWXXM is provided in the Manual on the ICAO Meteological Infmation Exchange Model (IWXXM) (Doc 10003) Tropical cyclone advisy infmation, if disseminated in digital fm, shall be fmatted in accdance with a globally interoperable infmation exchange model and shall use XML/GML Tropical cyclone advisy infmation, if disseminated in digital fm, shall be accompanied by the appropriate metadata. Note. Guidance on the infmation exchange model XML/GML and the metadata profile is provided in (Doc 10003). Editial note. Insert new Section 6 as follows: 6. SPACE WEATHER CENTRES 6.1 Space weather advisy infmation Recommendation. Advisy infmation on space weather should be issued in abbreviated plain language, using approved ICAO abbreviations and numerical values of self-explanaty nature, and should be in accdance with the template shown in Table A2-3. When no approved ICAO abbreviations are available, English plain language text, to be kept to a minimum, should be used Recommendation. As of 7 November 2019 until 4 November 2020, space weather advisy infmation should be made available in IWXXM GML fm, in addition to the dissemination of space weather advisy infmation in abbreviated plain language in accdance with As of 5 November 2020, space weather advisy infmation shall be disseminated in IWXXM GML fm, in addition to the dissemination of this advisy infmation in abbreviated plain language in accdance with Note. The technical specifications f IWXXM are contained in the Manual on Codes (WMO No.306), Volume I.3, Part D Representations Derived from Data Models. Guidance on the implementation of IWXXM is provided in the Manual on the ICAO Meteological Infmation Exchange Model (IWXXM) (Doc 10003) Recommendation. One me of the following space weather effects should be included in the space weather advisy infmation, using their respective abbreviations as indicated below: - HF communications (propagation, absption) HF COM - Communications via satellite (propagation, absption) SATCOM - GNSS-based navigation and surveillance (degradation) GNSS

23 C-7 C-WP/xxxx Appendix C - Radiation at flight levels (increased exposure) RADIATION Recommendation. The following intensities should be included in space weather advisy infmation, using their respective abbreviations as indicated below: - moderate MOD - severe SEV Note. Guidance on the use of these intensities is provided in the Manual on Space Weather in Suppt of International Air Navigation (Doc ####) Recommendation. Updated advisy infmation on space weather phenomena should be issued as necessary but at least every six hours until such time as the space weather phenomena are no longer detected and/ are no longer expected to have an impact. End of new section. Table A2-1. Template f advisy message f volcanic ash Key: M = inclusion mandaty, part of every message; O = inclusion optional; C = inclusion conditional, included whenever applicable [Applicable 7 November 2019]; = = a double line indicates that the text following it should be placed on the subsequent line. Note 4. The numbers 1 to 189 are included only f clarity and they are not part of the advisy message, as shown in the example. Element Detailed content Template(s) Examples 1 Identification of the type of message (M) Type of message VA ADVISORY VA ADVISORY 2 Status indicat (C) 1 Indicat of test exercise STATUS: TEST EXER STATUS: STATUS: TEST EXER 23 Time of igin (M) Year, month, day, time in UTC DTG: nnnnnnnn/nnnnz DTG: /0130Z 34 Name of VAAC (M) Name of VAAC VAAC: nnnnnnnnnnnn VAAC: TOKYO 45 Name of volcano (M) Name and IAVCEI 12 number of volcano VOLCANO: nnnnnnnnnnnnnnnnnnnnnn [nnnnnn] UNKNOWN UNNAMED VOLCANO: VOLCANO: KARYMSKY UNNAMED EDITORIAL NOTE. RENUMBER SUBSEQUENT FOOTNOTES IN TABLE A2-1.

24 C-WP/xxxx Appendix C C-8 Notes. 1. Used only when the message issued to indicate that a test an exercise is taking place. When the wd TEST the abbreviation EXER is included, the message may contain infmation that should not be used operationally will otherwise end immediately after the wd "TEST". [Applicable 7 November 2019] 12. International Association of Volcanology and Chemistry of the Earth s Interi (IAVCEI). 23. A straight line between two points drawn on a map in the Mercat projection a straight line between two points which crosses lines of longitude at a constant angle. 34. Up to 4 selected layers. 45. If ash repted (e.g. AIREP) but not identifiable from satellite data. Table A2-2. Template f advisy message f tropical cyclones Key: M = inclusion mandaty, part of every message; C = inclusion conditional, included whenever applicable [Applicable 7 November 2019] = = a double line indicates that the text following it should be placed on the subsequent line. Note 1. The ranges and resolutions f the numerical elements included in advisy messages f tropical cyclones are shown in Appendix 6, Table A6-4. Note 2. The explanations f the abbreviations can be found in the PANS-ABC (Doc 8400). Note 3. All the elements are mandaty. Note 43. Inclusion of a colon after each element heading is mandaty. Note 54. The numbers 1 to 1921 are included only f clarity and they are not part of the advisy message, as shown in the example. Element Detailed content Template(s) Examples 1 Identification of the type of message Type of message TC ADVISORY TC ADVISORY 2 Status indicat (C) 1 Indicat of test exercise STATUS: TEST EXER STATUS: STATUS: TEST EXER 23 Time of igin (M) Year, month, day and time in UTC of issue DTG: nnnnnnnn/nnnnz DTG: /19600Z 34 Name of TCAC (M) Name of TCAC (location indicat full name) TCAC: nnnn nnnnnnnnnn TCAC: TCAC: YUFO 12 MIAMI 45 Name of tropical cyclone (M) Name of tropical cyclone NN f unnamed tropical cyclone TC: nnnnnnnnnnnn NN TC: GLORIA 56 Advisy number (M) Advisy number: Year in full and message number (separate sequence starting with 01 f each cyclone) ADVISORY NR: nnnn/[n][n]nn ADVISORY NR: 2004/ Observed pposition of the centre (M) Day and time (in UTC) and pposition of the centre of the tropical cyclone (in degrees and minutes) OBS PSN:: nn/nnnnz Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] OBS PSN: 25/1800Z N2706 W Observed CB cloud 3 Location of CB cloud CB: WI nnnkm ( nnnnm) OF TC CB: WI 250NM OF TC

25 C-9 C-WP/xxxx Appendix C (C) Element Detailed content Template(s) Examples (referring to latitude and longitude (in degrees and minutes)) and vertical extent (flight level) CENTRE WI 4 Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] [Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn]] TOP [ABV BLW] FLnnn CENTRE TOP FL Direction and speed of movement (M) Direction and speed of movement given in sixteen compass points and km/h ( kt), respectively, moving slowly (< 6 km/h (3 kt)) stationary (< 2 km/h (1 kt)) MOV: N nnkmh ( KT) NNE nnkmh ( KT) NE nnkmh ( KT) ENE nnkmh ( KT) E nnkmh ( KT) ESE nnkmh ( KT) SE nnkmh ( KT) SSE nnkmh ( KT) S nnkmh ( KT) SSW nnkmh ( KT) SW nnkmh ( KT) WSW nnkmh ( KT) W nnkmh ( KT) WNW nnkmh ( KT) NW nnkmh ( KT) NNW nnkmh ( KT) SLW STNR MOV: NW 20KMH 810 Central pressure (M) Central pressure (in hpa) C: nnnhpa C: 965HPA 911 Maximum surface wind (M) Maximum surface wind near the centre (mean over 10 minutes, in m/s ( kt)) MAX WIND: nn[n]mps ( nn[n]kt) MAX WIND: 22MPS 1012 Fecast of centre position (+6 HR) (M) Day and time (in UTC) (6 hours from the DTG given in Item 2); FCST PSN +6 HR: nn/nnnnz Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] FCST PSN +6 HR: 25/2200Z N2748 W07350 Fecast position (in degrees and minutes) of the centre of the tropical cyclone 1113 Fecast of maximum surface wind (+6 HR) (M) Fecast of maximum surface wind (6 hours after the DTG given in Item 2) FCST MAX WIND +6 HR: nn[n]mps ( nn[n]kt) FCST MAX WIND +6 HR: 22MPS 1214 Fecast of centre position (+12 HR) (M) Day and time (in UTC) (12 hours from the DTG given in Item 2); FCST PSN +12 HR: nn/nnnnz Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] FCST PSN +12 HR: 26/0400Z N2830 W07430 Fecast position (in degrees and minutes) of the centre of the tropical cyclone 1315 Fecast of maximum surface Fecast of maximum surface wind (12 hours FCST MAX WIND +12 HR: nn[n]mps ( nn[n]kt) FCST MAX WIND +12 HR: 22MPS

26 C-WP/xxxx Appendix C C-10 Element Detailed content Template(s) Examples wind (+12 HR) (M) after the DTG given in Item 2) 1416 Fecast of centre position (+18 HR) (M) Day and time (in UTC) (18 hours from the DTG given in Item 2); FCST PSN +18 HR: nn/nnnnz Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] FCST PSN +18 HR: 26/1000Z N2852 W07500 Fecast position (in degrees and minutes) of the centre of the tropical cyclone 1517 Fecast of maximum surface wind (+18 HR) (M) Fecast of maximum surface wind (18 hours after the DTG given in Item 2) FCST MAX WIND +18 HR: nn[n]mps ( nn[n]kt) FCST MAX WIND +18 HR: 21MPS 1618 Fecast of centre position (+24 HR) (M) Day and time (in UTC) (24 hours from the DTG given in Item 2); FCST PSN +24 HR: nn/nnnnz Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] FCST PSN +24 HR: 26/1600Z N2912 W07530 Fecast position (in degrees and minutes) of the centre of the tropical cyclone 1719 Fecast of maximum surface wind (+24 HR) (M) Fecast of maximum surface wind (24 hours after the DTG given in Item 2) FCST MAX WIND +24 HR: nn[n]mps ( nn[n]kt) FCST MAX WIND +24 HR: 20MPS 1820 Remarks (M) Remarks, as necessary RMK: Free text up to 256 characters NIL RMK: NIL 1921 Expected time of issuance of next advisy (M) Expected year, month, day and time (in UTC) of issuance of next advisy NXT MSG: [BFR] nnnnnnnn/nnnnz NO MSG EXP NXT MSG: /2000Z Notes. 1. Used only when the message issued to indicate that a test an exercise is taking place. When the wd TEST the abbreviation EXER is included, the message may contain infmation that should not be used operationally will otherwise end immediately after the wd "TEST". [Applicable 7 November 2019] 1.2. Fictitious location. 3. In the case of CB clouds associated with a tropical cyclone covering me than one area within the area of responsibility, this element can be repeated, as necessary.. 4. The number of codinates should be kept to a minimum and should not nmally exceed seven. Example A2-2. Advisy message f tropical cyclones TC ADVISORY DTG: /19600Z TCAC: YUFO TC: GLORIA ADVISORY NR: 2004/1301 OBS PSN: 25/1800Z N2706 W07306 CB: WI 250NM OF TC CENTRE C: 965HPA

27 C-11 C-WP/xxxx Appendix C MAX WIND: 22MPS FCST PSN +6 HR: 25/2200Z N2748 W07350 FCST MAX WIND +6 HR: 22MPS FCST PSN +12 HR: 26/0400Z N2830 W07430 FCST MAX WIND +12 HR: 22MPS FCST PSN +18 HR: 26/1000Z N2852 W07500 FCST MAX WIND +18 HR: 21MPS FCST PSN +24 HR: 26/1600Z N2912 W07530 FCST MAX WIND +24 HR: 20MPS RMK: NIL NXT MSG: /2000Z Insert new Table A2-3, Examples A2-3, A2-4 and A2-5 as follows: Table A2-3. Template f advisy message f space weather infmation Key: M = inclusion mandaty, part of every message C = inclusion conditional, included whenever applicable Note 1. The explanations f the abbreviations can be found in the Procedures f Air Navigation Services ICAO Abbreviations and Codes (PANS-ABC, Doc 8400). Note 2. The spatial resolutions are shown in Attachment E. Note 3. Inclusion of a «colon» after each element heading is mandaty. Note 4. The numbers 1 to 14 are included only f clarity and they are not part of the advisy message, as shown in the examples. Element Detailed content Template(s) Examples 1 Identification of the type of message (M) Type of message SWX ADVISORY SWX ADVISORY 2 Status indicat (C)* Indicat of test exercise 3 Time of igin (M) Year, month, day, time in UTC 4 Name of SWXC (M) 5 Advisy number (M) STATUS: TEST EXER STATUS: STATUS: TEST EXER DTG: nnnnnnnn/nnnnz DTG: /0100Z Name of SWXC SWXC: Nnnnnnnnnnnn SWXC: DONLON Advisy number: year in full and unique message number ADVISORY NR: nnnn/[n][n][n]n ADVISORY NR: ADVISORY NR: 2016/1 6 Number of advisy being replaced (C) Number of the previously issued advisy being replaced NR RPLC: nnnn/[n][n][n]n NR RPLC: 2016/1

28 C-WP/xxxx Appendix C C-12 Element Detailed content Template(s) Examples Effect and intensity of SWX EFFECT: the space weather phenomena 7 Space weather effect and intensity (M) 8 Observed expected extent of space weather phenomena (M) 9 Fecast of the phenomena f the next 6 hours (M) Time: day, time in UTC Observed ( fecast if phenomena have yet to occur); hizontal extent ** (latitude bands and longitude in degrees) and/ altitude of space weather phenomena Day, time (in UTC) (6 hours from time given in item 8, rounded to the next full hour); Fecast extent and/ altitude of the space weather phenomena f the fixed valid time OBS FCST SWX: FCST SWX +6 HR: HF COM MOD SEV, SATCOM MOD SEV GNSS MOD SEV, HF COM MOD SEV AND GNSS MOD SEV, RADIATION1 MOD SEV nn/nnnnz DAYLIGHT SIDE HNH and/ MNH and/ EQN and/ EQS and/ MSH and/ HSH and Wnnn(nn) Ennn(nn) Wnnn(nn) Ennn(nn) and/ ABV FLnnn FLnnn nnn Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] [Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn]] NO SWX EXP nn/nnnnz DAYLIGHT SIDE HNH and/ MNH and/ EQN and/ EQS and/ MSH and/ HSH and Wnnn(nn) Ennn(nn) Wnnn(nn) Ennn(nn) and/ ABV FLnnn FLnnn nnn Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] [Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn]] NO SWX EXP SWX EFFECT: SWX EFFECT: SWX EFFECT: SWX EFFECT: SWX EFFECT: SWX EFFECT: OBS SWX: FCST SWX: OBS SWX: FCST SWX +6 HR: FCST SWX +6 HR: FCST SWX +6 HR: HF COM MOD GNSS SEV HF COM MOD AND GNSS MOD RADIATION MOD SATCOM SEV 08/0100Z DAYLIGHT SIDE 08/0100Z HNH HSH W18000 W09000 ABV FL350 08/0100Z HNH HSH E18000-W /0700Z DAYLIGHT SIDE 08/0700Z HNH HSH W18000 W09000 ABV FL350 08/0700Z HNH HSH E18000-W18000

29 C-13 C-WP/xxxx Appendix C Element Detailed content Template(s) Examples 10 Fecast of the phenomena f the next 12 hours (M) 11 Fecast of the phenomena f the next 18 hours (M) 12 Fecast of the phenomena f the next 24 hours (M) Day, time (in UTC) (12 hours from time given in item 8, rounded to the next full hour); Fecast extent and/ altitude of the space weather phenomena f the fixed valid time Day, time (in UTC) (18 hours from time given in item 8, rounded to the next full hour); Fecast extent and/ altitude of the space weather phenomena f the fixed valid time Day, time (in UTC) (24 hours from time given in item 8, rounded to the next full hour); FCST SWX +12 HR: FCST SWX +18 HR: FCST SWX +24 HR: NOT AVBL nn/nnnnz DAYLIGHT SIDE HNH and/ MNH and/ EQN and/ EQS and/ MSH and/ HSH and Wnnn(nn) Ennn(nn) Wnnn(nn) Ennn(nn) and/ ABV FLnnn FLnnn nnn Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] [Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn]] NO SWX EXP NOT AVBL nn/nnnnz DAYLIGHT SIDE HNH and/ MNH and/ EQN and/ EQS and/ MSH and/ HSH and Wnnn(nn) Ennn(nn) Wnnn(nn) Ennn(nn) and/ ABV FLnnn FLnnn nnn Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] [Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn]] NO SWX EXP NOT AVBL nn/nnnnz DAYLIGHT SIDE HNH FCST SWX +12 HR: FCST SWX +12 HR: FCST SWX +12 HR: FCST SWX +18 HR: FCST SWX +18 HR: FCST SWX +18 HR: FCST SWX +24 HR: 08/1300Z DAYLIGHT SIDE 08/1300Z HNH HSH W18000 W09000 ABV FL350 08/1300Z HNH HSH E18000-W /1900Z DAYLIGHT SIDE 08/1900Z HNH HSH W18000 W09000 ABV FL350 08/1900Z HNH HSH E18000-W /0100Z DAYLIGHT SIDE

30 C-WP/xxxx Appendix C C-14 Element Detailed content Template(s) Examples Fecast extent and/ altitude of the space weather phenomena f the fixed valid time and/ MNH and/ EQN and/ EQS and/ MSH and/ HSH and Wnnn(nn) Ennn(nn) Wnnn(nn) Ennn(nn) and/ ABV FLnnn FLnnn nnn Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] [Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn] Nnn[nn] Snn[nn] Wnnn[nn] Ennn[nn]] NO SWX EXP NOT AVBL 13 Remarks (M) Remarks, as necessary RMK : Free text up to 256 characters NIL 14 Next advisy (M) Year, month, day and time in UTC NXT ADVISORY: nnnnnnnn/nnnnz NO FURTHER ADVISORIES WILL BE ISSUED BY FCST SWX +24 HR: FCST SWX +24 HR: RMK: RMK: RMK: NXT ADVISORY: NXT ADVISORY: 09/0100Z HNH HSH W18000 W09000 ABV FL350 09/0100Z HNH HSH E18000-W18000 SWX EVENT HAS CEASED PROVIDER.GOV NIL /0700Z. NO FURTHER ADVISORIES * Used only when the message issued to indicate that a test an exercise is taking place. When the wd TEST the abbreviation EXER is included, the message may contain infmation that should not be used operationally will otherwise end immediately after the wd "TEST". [Applicable 7 November 2019]. ** One me latitude ranges should be included in the space weather advisy infmation f GNSS and RADIATION, Example A2-3: Space weather advisy message (GNSS and HF COM effects) SWX ADVISORY DTG: /0100Z SWXC: DONLON* SWX EFFECT: HF COM MOD AND GNSS MOD ADVISORY NR: 2016/2 NR RPLC : 2016/1 OBS SWX: /0100Z HNH HSH E18000 W18000 FCST SWX +6 HR: /0700Z HNH HSH E18000 W18000 FCST SWX +12 HR: /1300Z HNH HSH E18000 W18000 FCST SWX +18 HR: /1900Z HNH HSH E18000 W18000 FCST SWX +24 HR: /0100Z NO SWX EXP RMK: LOW LVL GEOMAGNETIC STORMING CAUSING INCREASED AURORAL ACT AND SUBSEQUENT MOD DEGRADATION OF GNSS AND HF COM AVBL IN THE AURORAL ZONE. THIS STORMING EXP TO SUBSIDE IN THE FCST PERIOD. SEE