# Commission Regulation (EU) No 965/2012 of 5 October 2012 laying down technical requirements and administrative procedures related to air operations pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council, Division (b): Aeroplanes operating under VMC at night shall be, in addition to (a), equipped with:

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

(1) a means of measuring and displaying the following:
(i) turn and slip,
(ii) attitude,
(iii) vertical speed, and
(iv) stabilised heading;
(2) a means of indicating when the supply of power to the gyroscopic instruments is not adequate.

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Source: https://www.legislation.gov.uk/eur/2012/965/annex/VIII/division/subpart+d/division/section+1/division/spoidea120/division/b (the official version)
Page: https://openlegislation.uk/eu-regulation-2012-965/annex-VIII/division-subpart+d/division-section+1/division-spoidea120/division-b
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.