# Council Directive of 20 December 1979 on the approximation of the laws of the Member States relating to units of measurement and on the repeal of Directive 71/354/EEC (80/181/EEC), Division 2: UNITS WHICH ARE DEFINED ON THE BASIS OF SI UNITS BUT ARE NOT DECIMAL MULTIPLES OR SUBMULTIPLES THEREOF

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

The character (*) after a unit name or symbol indicates that it does not appear in the lists drawn up by the CGPM, CIPM o BIPM. This applies to the whole of this Annex.
No international symbol exists.
Quantity
Unit
Name
Symbol
Value
Plane angle
revolution*
1 revolution = 2 π rad
grade* or gon*
gon*
1 gon = π 200 rad
degree
°
1° = π 180 rad
minute of angle
′
1′ = π 10800 10800 rad
second of angle
″
1″ = π 648000 648000 rad
Time
minute
min
1 min = 60 s
hour
h
1 h = 3 600 s
day
d
1 d = 86 400 s

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Source: https://www.legislation.gov.uk/eudr/1980/181/annex/chapter/I/division/2 (the official version)
Page: https://openlegislation.uk/eu-directive-1980-181/annex/chapter-I/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.