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unit termination dates established by the Council. Termination
dates, when established, will be given in Chapter 4.
Table 3-1. SI unit prefixes
Multiplication factor Prefix Symbol
exa
peta
tera
gigs
mega
kilo
hecto
deca
deci
centi
milli
micro
nano
pic0
femto
atto
-Y-lY OO
No. 16
ANNEX 5
Chapter 3 Annex 5 - Units of Measurement to be used in Air and Ground Operations
3.3 Application of specific units
3.3.1 The application of units of measurement for certain
quantities used in international civil aviation air and ground
operations shall be in accordance with Table 3-4.
Note.- Table 3-4 is intended to provide stadardization of
units (including prefixes) for those quantities commonly used
in air and ground operations. Basic Annex provisions apply for
units to be used for quantities not listed.
3.3.2 Recommendation.- Means and provisions for
design, procedures and training should be established for
operations in environments involving the use of standard and
non-SI altemtives of specific units of measurement, or the
transition between environments using dtperent units, with due
consideration to human performance.
Note.- Guidance material on human performance can be
found in the Human Factors Training Manual (Doc 9683) and
Circular 238 (Human Factors Digest No. 6 - Ergonomics).
Table 3-2. Non-SI units for use with the SI
Specific quantities
in Table 3-4 Definition
related to Unit Symbol (in t e r n of SI units)
mass tonne t l t = l d k g
plane angle degree
minute
second
o lo = (N180) rad
, 1' = (1160)" = (N10 800) rad
I 1" = (1160)' = (N648 000) rad
temperature degree Celsius "C 1 unit "C = 1 unit K ~ )
time
volume
minute
hour
day
min 1min=60s
h 1 h = 60 min = 3 600 s
d 1 d = 24 h = 86 400 s
week, month, year -
a) See Attachment C. Table C-2 for conversion.
'hble 3-3. Non-SI alternative units permitted for temporary use with the SI
Specific quantities
in Table 3-4 Definition
related to Unit Symbol (in t e r n of SI units)
distance (long) nautical mile NM lNM=1852m
distance (~ertical)~) foot ft 1 ft = 0.304 8 m
speed knot kt 1 kt = 0.514 444 mls
a) altitude, elevation, height, vertical speed.
Ulrn
No. 16
Annex 5 - Units of Measurement to be used in Air and Ground Operations Chapter 3
Table 3-4. Standard applicatio~lo f specific units of measurement
Ref: No. Quantity
Non-Sl
Primary unit alternative unit
(symbol) (symbol)
altitude
area
distance (long)a)
distance (short)
elevation
endurance
height
latitude
length
longitude
plane angle (when required, decimal subdivisions of the degree
shall be used)
runway length
runway visual range
tank capacities (air~raft)~)
time
1.16 visibilityc)
1.17 volume
1.18 wind direction (wind directions other than for a landing and
take-off shall be expressed in degrees true; for landing and take-off
wind directions shall be expressed in degrees magnetic)
2.1 air density
2.2 area density
2.3 cargo capacity
2.4 cargo density
2.5 density (mass density)
2.6 fuel capacity (gravimetric)
2.7 gas density
2.8 gross mass or payload
2.9 hoisting provisions
2.10 linear density
2.1 1 liquid density
2.12 mass
2.13 moment of inertia
2.14 moment of momentum
2.15 momentum
m
m ft
h and min
m
m
L
S
rnin
h
d
week
month
211 1/00
No. 16
Chapter 3 Annex 5 - Units of Measurement to be used in Air and Ground Operations
Ref: No. Quantity
Non-SI
Primary unit alternative unit
(symbol) (symbol)
4. Mechanics
5. Flow
air pressure (general)
altimeter setting
atmospheric pressure
bending moment
force
fuel supply pressure
hydraulic pressure
modulus of elasticity
pressure
stress
surface tension
thrust
torque
vacuum
airspeedd)
angular acceleration
angular velocity
energy or work
equivalent shaft power
frequency
ground speed
impact
kinetic energy absorbed by brakes
linear acceleration
power
rate of trim
shaft power
velocity
vertical speed
wind speed
engine airflow
engine waterflow
fuel consumption (specific)
piston engines
turbo-shaft engines
jet engines
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附件5--空中和地面运行中所使用的计量单位(49)
