--- title: "NCC.IDE.A.125 Operations under IFR – flight and navigational instruments and associated equipment — Part-NCC · Avioverse" description: "Aeroplanes operated under IFR shall be equipped with: a means of measuring and displaying the following:" url: "https://avioverse.aero/regulations/easa/air-ops/part-ncc/subpart-d/ncc-ide-a-125" --- # NCC.IDE.A.125 Operations under IFR – flight and navigational instruments and associated equipment ANNEX VI (Part-NCC) · Regulation (EU) No 965/2012 · EAR revision 27 Mar 2026 IR Implementing rule ## NCC.IDE.A.125 Operations under IFR – flight and navigational instruments and associated equipment Aeroplanes operated under IFR shall be equipped with: (a) a means of measuring and displaying the following: (1) magnetic heading; (2) time in hours, minutes and seconds; (3) barometric altitude; (4) indicated airspeed; (5) vertical speed; (6) turn and slip; (7) attitude; (8) stabilised heading; (9) outside air temperature; and (10) Mach number whenever speed limitations are expressed in terms of Mach number; (b) a means of indicating when the supply of power to the gyroscopic instruments is not adequate; (c) whenever two pilots are required for the operation, an additional separate means of displaying for the second pilot: (1) barometric altitude; (2) indicated airspeed; (3) vertical speed; (4) turn and slip; (5) attitude; (6) stabilised heading; and (7) Mach number whenever speed limitations are expressed in terms of Mach number, if applicable; (d) a means of preventing malfunction of the airspeed indicating systems required in (a)(4) and (c)(2) due to condensation or icing; (e) an alternate source of static pressure; (f) a chart holder in an easily readable position that can be illuminated for [night](https://avioverse.aero/glossary/easa/night) operations; (g) a second independent means of measuring and displaying altitude; and (h) an emergency power supply, independent of the main electrical generating system, for the purpose of operating and illuminating an attitude indicating system for a minimum period of 30 minutes. The emergency power supply shall be automatically operative after the total failure of the main electrical generating system and clear indication shall be given on the instrument or on the instrument panel that the attitude indicator is being operated by emergency power. IR · NCC.IDE.A.125 — Regulation (EU) No 965/2012 · Regulation (EU) 2019/1384 · Air OPS Easy Access Rules · EAR revision 27 Mar 2026 AMC Acceptable means of compliance ## AMC1 NCC.IDE.A.125(a)(9) Operations under IFR – flight and navigational instruments and associated equipment MEANS OF DISPLAYING OUTSIDE AIR TEMPERATURE (a) The means of displaying outside air temperature should be calibrated in degrees Celsius. (b) The means of displaying outside air temperature may be an air temperature indicator that provides indications that are convertible to outside air temperature. AMC · AMC1 NCC.IDE.A.125(a)(9) — Regulation (EU) No 965/2012 · ED Decision 2013/021/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026 AMC Acceptable means of compliance ## AMC1 NCC.IDE.A.125(d) Operations under IFR – flight and navigational instruments and associated equipment MEANS OF PREVENTING MALFUNCTION DUE TO CONDENSATION OR ICING The means of preventing malfunction due to either condensation or icing of the airspeed indicating system should be a heated pitot tube or equivalent. AMC · AMC1 NCC.IDE.A.125(d) — Regulation (EU) No 965/2012 · ED Decision 2013/021/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026 AMC Acceptable means of compliance ## AMC1 NCC.IDE.A.125(f) Operations under IFR – flight and navigational instruments and associated equipment CHART HOLDER An acceptable means of compliance with the chart holder requirement is to display a pre-composed chart on an [electronic flight bag (EFB)](https://avioverse.aero/glossary/easa/electronic-flight-bag). AMC · AMC1 NCC.IDE.A.125(f) — Regulation (EU) No 965/2012 · ED Decision 2013/021/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026 AMC Acceptable means of compliance ## AMC2 NCC.IDE.A.125(a)(3) Operations under IFR – flight and navigational instruments and associated equipment ALTIMETERS — IFR OR [NIGHT](https://avioverse.aero/glossary/easa/night) OPERATIONS Except for unpressurised aeroplanes operating below 10 000 ft, the altimeters of aeroplanes operating under IFR or at night should have counter drum-pointer or equivalent presentation. AMC · AMC2 NCC.IDE.A.125(a)(3) — Regulation (EU) No 965/2012 · ED Decision 2013/021/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026 [All rules in SUBPART D: INSTRUMENTS, DATA AND EQUIPMENT](https://avioverse.aero/regulations/easa/air-ops/part-ncc/subpart-d) Consolidated from the EASA Easy Access Rules (revision 27 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.