# 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 (e): Whenever two pilots are required for the operation, aeroplanes shall be equipped with an additional separate means of displaying the following:

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

(1)barometric altitude,
(2) indicated airspeed,
(3) slip, or turn and slip, as applicable,
(4) attitude, if applicable,
(5) vertical speed, if applicable
(6) stabilised heading, if applicable, and
(7) Mach number whenever speed limitations are expressed in terms of Mach number, if applicable.

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