Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 676

4. In instrumented systems without continuous adjustment of the illumination threshold, the use of four equally spaced illumination threshold values with agreed corresponding back-ground luminance ranges is convenient but will reduce accuracy. The four values are shown in Figure D-1 in the form of a step function; they are tabulated in Table D-1 for greater clarity. Note 1.— Information and guidance material on the runway lights to be used for assessment of runway visual range are contained in the Manual of Runway Visual Range Observing and Reporting Practices (Doc 9328). Note 2.— In accordance with the definition of visibility for aeronautical purposes, the intensity of lights to be used for the assessment of visibility is in the vicinity of 1 000 cd. Table D-1. Illumination threshold steps Condition Illumination threshold (lx) Background luminance (cd/m2) Night 8 × 10–7 ≤ 50 Intermediate 10–5 51 – 999 Normal day 10–4 1000 – 12000 Bright day (sunlit fog) 10–3 > 12000 Annex 3 — Meteorological Service for International Air Navigation Attachment D 7/11/07 ATT D-2 Figure D-1. Relationship between the illumination threshold ET (lx) and background luminance B (cd/m2) — END — 1 000 10 000 100 000 Night Intermediate Normal day Background luminance (cd/m ) Illumination threshold (lx) 10 3 10 6 10 7 log ( ) = 0.57 log ( ) + 0.05 [log( )] – 6.66 B B ET Bright day ICAO TECHNICAL PUBLICATIONS The following summary gives the status, and also describes in general terms the contents of the various series of technical publications issued by the International Civil Aviation Organization. It does not include specialized publications that do not fall specifically within one of the series, such as the Aeronautical Chart Catalogue or the Meteorological Tables for International Air Navigation. International Standards and Recommended Practices are adopted by the Council in accordance with Articles 54, 37 and 90 of the Convention on International Civil Aviation and are designated, for convenience, as Annexes to the Convention. The uniform application by Contracting States of the specifications contained in the International Standards is recognized as necessary for the safety or regularity of international air navigation while the uniform application of the specifications in the Recommended Practices is regarded as desirable in the interest of safety, regularity or efficiency of international air navigation. Knowledge of any differences between the national regulations or practices of a State and those established by an International Standard is essential to the safety or regularity of international air navigation. In the event of non-compliance with an International Standard, a State has, in fact, an obligation, under Article 38 of the Convention, to notify the Council of any differences. Knowledge of differences from Recommended Practices may also be important for the safety of air navigation and, although the Convention does not impose any obligation with regard thereto, the Council has invited Contracting States to notify such differences in addition to those relating to International Standards. Procedures for Air Navigation Services (PANS) are approved by the Council for worldwide application. They contain, for the most part, operating procedures regarded as not yet having attained a sufficient degree of maturity for adoption as International Standards and Recommended Practices, as well as material of a more permanent character which is considered too detailed for incorporation in an Annex, or is susceptible to frequent amendment, for which the processes of the Convention would be too cumbersome. Regional Supplementary Procedures (SUPPS) have a status similar to that of PANS in that they are approved by the Council, but only for application in the respective regions. They are prepared in consolidated form, since certain of the procedures apply to overlapping regions or are common to two or more regions. The following publications are prepared by authority of the Secretary General in accordance with the principles and policies approved by the Council. Technical Manuals provide guidance and information in amplification of the International Standards, Recommended Practices and PANS, the implementation of which they are designed to facilitate. Air Navigation Plans detail requirements for facilities and services for international air navigation in the respective ICAO Air Navigation Regions. They are prepared on the authority of the Secretary General on the basis of recommendations of regional air navigation meetings and of the Council action thereon. The plans are amended periodically to reflect changes in requirements and in the status of implementation of the recommended facilities and services. ICAO Circulars make available specialized information of interest to Contracting States. This includes studies on technical subjects. COVER SHEET TO AMENDMENT 54 INTERNATIONAL STANDARDS AND RECOMMENDED PRACTICES AERONAUTICAL CHARTS ANNEX 4 TO THE CONVENTION ON INTERNATIONAL CIVIL AVIATION TENTH EDITION — JULY 2001 INTERNATIONAL CIVIL AVIATION ORGANIZATION Checklist of Amendments to Annex 4 Effective date Date of applicability Tenth Edition (incorporates Amendments 1 to 52) 16 July 2001 1 November 2001; 28 November 2002 Amendment 53 (adopted by the Council on 23 February 2004) 12 July 2004 25 November 2004 Amendment 54 (adopted by the Council on 2 March 2007) Replacement pages (iii), (v), (xii), 1-1 to 1-7, 3-1, 4-1, 5-1 to 5-4, 6-1, 7-1, 7-2, 8-2, 8-3, 9-1 to 9-3, 10-1 to 10-3, 11-1, 11-3, 11-4, 11-5, 13-2, 14-1, 15-1, 21-1, 21-2, APP 2-10, APP 2-11, APP 6-3 and APP 6-4 16 July 2007 22 November 2007 16/7/07 Transmittal note Amendment 54 to the International Standards and Recommended Practices AERONAUTICAL CHARTS (Annex 4 to the Convention on International Civil Aviation)

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