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including an explanation of the obligations of States
with regard to the application of the Standards and
Recommended Practices ensuing from the Convention
and the Resolution of Adoption.
b) Introductions comprising explanatory material
introduced at the beginning of parts, chapters or
sections of the Annex to assist in the understanding
of the application of the text.
C) Notes included in the text, where appropriate, to give
factual information or references bearing on the
Standards or Recommended Practices in question,
ANNEX 5
Annex 5 - Units of Measurement to be used in Air
and Ground Operations
but not constituting part of the Standards or
Recommended Practices.
d) Attachments comprising material supplementary to
the Standards and Recommended Practices, or
included as a guide to their application.
Selection of Language
This Annex has been adopted in four languages - English,
French, Russian and Spanish. Each Contracting State is
requested to select one of those texts for the purpose of
national implementation and for other effects provided for in
the Convention, either through direct use or through
Foreword
translation into its own national language, and to notify the
Organization accordingly.
Editorial Practices
The following practice has been adhered to in order to indicate
at a glance the status of each statement: Standards have been
printed in light face roman; Notes have been printed in light
face italics, the status being indicated by the prefix Note.
Any reference to a portion of this document, which is
identified by a number and/or title, includes all subdivisions
of that portion.
Table A.-Amendments to Annex 5
Adopted
Arnendrnent(s) Sourcefs) Subject(s) Effective
Applicable
1st Edition Council action in
pursuance of
Assembly
Resolution A1-35
I to 11 Air Navigation
(2nd Edition) Commission
12 Air Navigation
(3rd Edition) Commission
13 Council action in
(4th Edition) pursuance of
Assembly
Resolution A22-18,
Appendix F
14 Air Navigation
Commission study
15 Air Navigation
Commission
16 April 1948
15 September 1948
1 January 1949
Reduction of the number of unit tables from five tables to two tables. 11 December 1951
1 May 1952
1 September 1952
Provision for identical units in the ICAO Table and the Blue Table except in 8 December 1961
respect of those units for measurement of altitudes. elevations, heights and 1 April 1962
vertical speed. 1 July 1964
Change in the title of the Annex and increase in the scope to cover all 23 March 1979
aspects of air and ground operations; provision of standardized system of 23 July 1979
units based on the SI; identification of non-SI units permitted for use in 26 November 1981
international civil aviation; provision for termination of the use of certain
non-SI units.
Establishment of a firm date for the termination of the unit bar and 27 February 1984
introduction of guidance material relating t o Co-ordinated Universal Time 30 July 1984
(UTC) and the method of referencing date and time. 22 November 1984
New definition of the metre; introduction of the special name "sievert"; 24 November 1986
deletion of references to temporary non-SI units no longer to be used. 19 April 1987
19 November 1987
INTERNATIONAL STANDARDS
CHAPTER 1. DEFINITIONS
When the following terms are used in'the Standards concerning
the units of measurement to be used in all aspects of
international civil aviation air and ground operations, they
have the following meanings:
Ampere (A). The ampere is that constant electric current
which, if maintained in two straight parallel conductors of
infinite length, of negligible circular cross-section, and placed
1 metre apart in vacuum, would produce between these conductors
a force equal to 2 x lo-' newton per metre of length.
Becquerel (Bq). The activity of a radionuclide having one
spontaneous nuclear transition per second.
Candela (cd). The luminous intensity, in the perpendicular
direction, of a surface of 1/600 000 square metre of black
body at the temperature of freezing platinum under a pressure
of 101 325 newtons per square metre.
Celsius temperature (toc). The Celsius temperature is
equal to the difference toc = T - To between two thermodynamic
temperatures T and To where To equals 273.15
kelvin.
Coulomb (C). The quantity of electricity transported in
1 second by a current of I ampere.
Degree Celsius ("C). The special name for the unit kelvin
for use in stating values of Celsius temperature.
　
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