NCC.IDE.A.250 Navigation equipment
(a) Aeroplanes shall be equipped with navigation equipment that will enable them to proceed in accordance with:
(1) the ATS flight plan, if applicable; and
(2) the applicable airspace requirements.
(b) Aeroplanes shall have sufficient navigation equipment to ensure that, in the event of the failure of one item of equipment at any stage of the flight, the remaining equipment shall allow safe navigation in accordance with (a), or an appropriate contingency action, to be completed safely.
(c) Aeroplanes operated on flights in which it is intended to land in IMC shall be equipped with suitable equipment capable of providing guidance to a point from which a visual landing can be performed. This equipment shall be capable of providing such guidance for each aerodrome at which it is intended to land in IMC and for any designated alternate aerodromes.
(d) For PBN operations the aircraft shall meet the airworthiness certification requirements for the appropriate navigation specification.
(e) Aeroplanes shall be equipped with surveillance equipment in accordance with the applicable airspace requirements.