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6.4 humidity (absolute)
6.5 coefficient of linear expansion
6.6 quantity of heat
6.7 temperature
7. Electricity and Magnetism
capacitance
conductance
conductivity
current density
electric current
electric field strength
electric potential
electromotive force
magnetic field strength
magnetic flux
magnetic flux density
power
quantity of electricity
resistance
8. Light and Related Electromagnetic Radiations
illuminance
luminance
luminous exitance
luminous flux
luminous intensity
quantity of light
radiant energy
wavelength
3 - Standard Application of Units of Measurement
Table 3-4 (conr.)
Annex 5 - Units of Measurement to be used in Air
and Ground Operations
Ref: No. Quantity
No n -SI
Primary unit alternative unit
(symbol) (sy m b 01)
9. Acoustics
frequency
mass density
noise level
period, periodic time
sound intensity
sound power
sound pressure
sound level
static pressure (instantaneous)
velocity of sound
volume velocity (instantaneous)
wavelength
10. Nuclear Physics and Ionizing Radiation
10.1 absorbed dose
10.2 absorbed dose rate
10.3 activity of radionuclides
10.4 dose equivalent
10.5 radiation exposure
10.6 exposure rate
rd
rd/s
Ci
rem
R
R/s
, a) As used In navigation, generally in excess of 4 000 m.
b) Such as a~rcraftfu el, hydraulic fluids. water, oil and high pressure oxygen vessels.
c) Visibility of less than 5 krn may be given in m.
d) Airspeed is sometime$ reported in flight operations in terms of the ratio MACH number
e) The decibel (dB) is a ratio wh~ch may be used as a unit for expressing sound pressure level and sound power level. When used, the reference level must be
specified.
CHAPTER 4.-TERMINATION OF USE OF
NON-SI ALTERNATIVE UNITS
Introductory Note. - The non-SI units listed in Table 3-3 have been retained
temporarily for use as alternative units because of their widespread use and to
avoid potential safety problems which could result .from the lack of
international co-ordination concerning the termination of' their use. As
termination dates are established by the Council, they will be reflected as
Standards contained in this Chapter. It is expected that the estabiishmenr of'
such dates will be well in advance of actual termination. Aiv special
procedures associated with spec~jic unit termination w[li be circulated to all
States separately from this Annex.
4.1 The use in international civil aviation operations of the
alternative non-SI units listed in Table 3-3 shall be terminated on the
dates listed in Table 4- 1.
Table 4-].-Termination dates for non-SI alternative units
No n -SI
alternative unit Termination date
Curie
Rad 1 January 1985
Rem
Roentgen
Bar not establisheda)
Nautical mile 1 not establishedb)
Foot not establishedc)
a) For planning purposes the termination date for the use of the bar has bezn
established as 31 December 1985.
b) No termination date has yet been established for use of nautical mile and
knot. For planning purposes any termination date for these units will not
be before 31 December 1990.
C) No termination dale has yet been established for use of the foot.
ANNEX 5
ATTACHMENTS TO ANNEX 5
ATTACHMENT A.-DEVELOPMENT OF THE INTERNATIONAL
SYSTEM OF UNITS (SI)
1.-Historical background
1.1 The name S1 is derived from "Systeme
International d'Unites". The system has evolved from units
of length and mass (metre and kilogram) which were created
by members of the Paris Academy of Sciences and adopted
by the French National Assembly in 1795 as a practical
measure to benefit industry and commerce. The original
system became known as the metric system. Physicists
realized the advantages of the system and it was soon
adopted in scientific and technical circles.
1.2 International standardization began with an
1870 meeting of I5 States in Paris that led to the International
Metric Convention in 1875 and the eslablishment
of a permanent International Bureau of Weights and
Measures. A General Conference on Weights and Measures
(CGPM) was also constituted to handle all international
matters concerning the metric system. In 1889 the first
meeting of the CGPM legalized the old prototype of the
metre and the kilogram as the international standard for unit
of length and unit of mass respectively. Other units were
agreed in subsequent meetings and by its 10th Meeting in
　
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