# The Air Navigation (Carbon Offsetting and Reduction Scheme for International Aviation) Order 2021, Article 6: Units

Extent: E+W+S+N.I.

The non-SI units listed in column 2 of the Table must be used either in lieu of, or in addition to, SI units as primary units of measurement under this Order.
Table
Non-SI units for use with SI units
Specific quantity
Non-SI Unit
Symbol
Definition (in terms of SI units)
Mass
tonne
T
1 t = 103 kg
Time
hour
H
1 h = 60 min = 3,600 s
Volume
litre
L
1 L = 1 dm3 = 10-3 m3

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Source: https://www.legislation.gov.uk/uksi/2021/534/article/6 (the official version)
Page: https://openlegislation.uk/air-navigation-carbon-offsetting-and-reduction-scheme-for-international-aviation-order-2021/article-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.