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(UTC) and the method of referencing date and time 22 November 1984
No. 14
22/11/84
3 - Standard Application of Units of Measurement
Table 3-4 (cont.)
Annex 5 - Units of Measurement to be used in Air
and Ground Operations
Ref No. Quantity
Non-SZ
Primary unit alternative unit
(symbol) (symbol)
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
r d
rd/s
Ci
rem
R
R/s
a) As used in navigation, generally in excess of 4 000 m.
b) Such as aircraft fuel, hydraulic fluids, water. oil and high pressure oxygen vessels.
c) Visibility of less than 5 km may be given in m.
d) Airspeed is sometimes reported in flight operations in terms of the ratio MACH number.
e) The decibel (dB) is a ratio which may be used as a unil for expressing sound pressure level and sound power level. When used, the reference level musi be
specified.
CHAPTER 4.-TERMINATION OF USE OF
NON-SI ALTERNATIVE UNITS
Introductory Note.-The non-SZ units listed in Table 3-3 have been
retained temporarily for use as alternative units because of their
widespread use and to avoid potential sqfety 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
establishment of such dates will be well in advance of actual termination.
Any special procedures associated with specifc unit termination will 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 4-1 .-Termination dates for
non-SI alternative units
Non-SZ
alternative unit Termination date
Curie I
Rad
Rem 1 January 1985
Roentgen )
Bar 31 December 1985
Knot
Nautical mile not establisheda)
Foot not establishedb)
a) No termination date has yet been established for use of mutical n;ik and
knot. For planning purposes any termination date for these units will not
be before 3 1 December 1990.
b) No termination date has yet been established for use of the f m .
No. 14
22/11/84
ANNEX 5
Attachment C
Annex 5 - Units of Measurement to be used in Air
and Ground Operations
Table C-1 (cont.)
To convert from to Multiply by
ton (register)
ton (short, 2 000 1b)
ton (long)lyd3
ton (short)/h
ton-force (2 000 lbf)
tonne
tom (mm Hg, O'C)
cubic metre (m3)
kilogram (kg)
kilogram per cubic metre (kg/m3)
kilogram per second (kg/s)
newton (N)
kilogram (kg)
pascal (Pa)
unit pole
yard
yd2
yd"
yd3 /min
year (calendar)
year (sidereal)
year (tropical)
weber (Wb)
joule (J)
joule (J)
watt per square metre (w/m2)
watt per square metre (w/m2)
metre (m)
square metre (m2 )
cubic metre (m3)
cubic metre per second (m3 1s)
second (s)
second (s)
second (s)
Table C-2.-Temperature conversion formulae
To convert from to Use formula
Celsius temperature (toC)
Fahrenheit temperature (LF)
Fahrenheit temperature (LF)
Kelvin temperature (tK)
Rankine temperature (LR)
Kelvin temperature (tK)
Celsius temperature (LC)
Kelvin temperature (tK)
Celsius temperature (LC)
Kelvin temperature (tK)
tK=t, +273.15 C
LC = (t,, - 32)/1.8
tK= (to, + 459.67)Il.g
tOc = tK- 273.15
tK= tR/1.8
No. 14 2/11/84
ATTACHMENT D.-CO-ORDINATED UNIVERSAL TIME
1. Co-ordinated Universal Time (UTC) has now replaced
Greenwich Mean Time (GMT) as the accepted international standard for
clock time. It is the basis for civil time in many States and is also the time
used in the world-wide time signal broadcasts used in aviation. The use of
UTC is recommended bv such bodies as the General Conference on
Weights and Measures (CGPM), the International Radio Consultative
Committee ICCIR) and the World Administration Radio Conference
(WARC).
2. The basis for all clock time is the time of apparent rotation
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