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1st Edition Council action in
pursuance of
Assembly
Resolution A 1-35
1 to 11 Air Navigation Reduction of the number of unit tables from five tabks to two tables.
(2nd Edition) Commission
12 Air Navigation Provision for identical units in the ICAO Table and the Blue Table except in
(3rd Edition) Commission respect of those units for measurement of altitudes, elevations, heights and
vertical speed.
13 Council action in Change in the title of the Annex and increase in the scope to cover all aspects
(4th Edition) pursuance of of air and ground operations; provision of standardized system of units based on
Assembly the SI; identification of non-SI units permitted for use in international civil
Resolution A22-18, aviation; provision for termination of the use of certain non-SI units.
Appendix F
Air Navigation Establishment of a fum date for the termination of the unit bar and introduction
Commission study of guidance material relating to Coordinated Universal Time (UTC) and the
method of referencing date and time.
Air Navigation New definition of the metre; introduction of the special name "sievert"; deletion
Commission of references to temporary non-SI units no longer to be used.
Adopred
Effecrive
Applicable
16 April 1948
IS September 1948
1 January 1949
11 December 1951
1 May 1952
1 September 1952
8 December 1%1
I April 1962
1 July 1964
23 March 1979
23 July 1979
26 November 1981
27 February 1984
30 July 1984
22 November 1984
24 November 1986
19 April 1987
19 November 1987
16 Amendment 162 to New provisions concerning Human Factors.
Annex 1
21 February 2000
17 July 2000
2 November 2000
211 1/00
No. 16
INTERNATIONAL STANDARDS
AND RECOMMENDED PRACTICES
CHAPTER 1. DEFINITIONS
When the following terms are used in the Standards and
Recommended Practices 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 newton per metre
of length.
Human performance. Human capabilities and limitations
which have an impact on the safety and efficiency of
aeronautical operations.
Joule (J). The work done when the point of application of a
force of 1 newton is displaced a distance of 1 metre in the
direction of the force.
Kelvin (K). A unit of thermodynamic temperature which is the
fraction 11273.16 of the thermodynamic temperature of the
triple point of water.
Becquerel (Bq). The activity of a radionuclide having one Kilogram (kg). The unit of mass equal to the mass of the
spontaneous nuclear transition per second. international prototype of the kilogram.
Candela (cd). The luminous intensity, in the perpendicular Knot w. The speed equal to 1 nautical mile per hour.
direction, of a surface of 11600 000 square metre of black
body at the temperature of freezing under a Litre (L). A unit of volume restricted to the measurement of
pressure of 101 325 newtons per square metre. liquids and gases which is equal to 1 cubic decimetre.
Celsius temperature (toC).T he Celsius temperature is equal to Lumen (Im)' The luminous emitted in a ''lid
the difference toc = T - To between two thermodynamic 1 sLeradian by a point source having a uniform intensity
temperatures T and To where To equals 273.15 kelvin. of 1 candela.
Coulomb (C). The quantity of electricity transported in Lux (Lr). The illuminance produced by a luminous flux of
1 lumen uniformly distributed over a surface of 1 square
1 second by a current of 1 ampere.
metre.
Degree Celsius ("C). The special name for the unit kelvin for Metre (m). The distance travelled by light in a vacuum during
use in stating values of Celsius temperature. 11299 792 458 of a second.
Farad (F). The capacitance of a capacitor between the plates Mole (mol). The amount of substance of a system which
of which there appears a difference of potential of 1 volt contains as many elementary entities as there are atoms in
when it is charged by a quantity of electricity equal to 0.01 2 kilogram of carbon- 1 2.
1 coulomb.
Note.- When the mole is used, the elementary entities must
Foot Cft). The length equal to 0.304 8 metre exactly. be spec#ed and may be atoms, molecules, ions, electrons,
other particles or spec@ed groups of such particles.
　
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