Page 691 - UK Air Operations Regulations 201121

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(e) lighting supplied from the aeroplane’s electrical system to provide illumination in all
passenger compartments;
(f) an independent portable light for each crew member station; and
(g) lights to conform with the International Regulations for Preventing Collisions at Sea if the
aeroplane is operated as a seaplane.
NCO.IDE.A.120 Operations under VFR — flight and navigational instruments and associated equipment
(a) Aeroplanes operated under VFR by day shall be equipped with a means of measuring
and displaying the following:
(1) magnetic heading;
(2) time, in hours, minutes and seconds;
(3) barometric altitude;
(4) indicated airspeed; and
(5) Mach number, whenever speed limitations are expressed in terms of Mach
number.
(b) Aeroplanes operated under visual meteorological conditions (VMC) at night, or in
conditions where the aeroplane cannot be maintained in a desired flight path without
reference to one or more additional instruments, shall be, in addition to (a), equipped
with:
(1) a means of measuring and displaying the following:
(i) turn and slip;
(ii) attitude;
(iii) vertical speed; and
(iv) stabilised heading; and
(2) a means of indicating when the supply of power to the gyroscopic instruments is
not adequate.
(c) Aeroplanes operated in conditions where they cannot be maintained in a desired flight
path without reference to one or more additional instruments, shall be, in addition to (a)
and (b), equipped with a means of preventing malfunction of the airspeed indicating
system required in (a)(4) due to condensation or icing.
NCO.IDE.A.120 AMC1 Operations under VFR & operations under IFR — flight and navigational instruments and associated
equipment
INTEGRATED INSTRUMENTS
(a) Individual equipment requirements may be met by combinations of instruments, by
integrated flight systems or by a combination of parameters on electronic displays. The
information so available to each required pilot should not be less than that required in the
applicable operational requirements, and the equivalent safety of the installation should
be approved during type certification of the aeroplane for the intended type of operation.
(b) The means of measuring and indicating turn and slip, aeroplane attitude and stabilised
aeroplane heading may be met by combinations of instruments or by integrated flight
director systems, provided that the safeguards against total failure, inherent in the three
separate instruments, are retained.
NCO.IDE.A.120 AMC2 Operations under VFR — flight and navigational instruments and associated equipment
LOCAL FLIGHTS
For flights that do not exceed 60 minutes duration, that take off and land at the same aerodrome, and
that remain within 50 NM of that aerodrome, an equivalent means of complying with NCO.IDE.A.120
(b)(1)(i), (b)(1)(ii) may be:
(a) a turn and slip indicator;
(b) a turn co-ordinator; or
(c) both an attitude indicator and a slip indicator.
NCO.IDE.A.120 GM1 Operations under VFR — flight and navigational instruments and associated equipment
SLIP INDICATION
Aeroplanes should be equipped with a means of measuring and displaying slip.
NCO.IDE.A.120(a) Operations under VFR & operations under IFR — flight and navigational instruments and associated
(1)&NCO.IDE.A.125(a)(1) equipment
MEANS OF MEASURING AND DISPLAYING MAGNETIC HEADING
The means of measuring and displaying magnetic direction should be a magnetic compass or
equivalent.
NCO.IDE.A.120(a) Operations under VFR & operations under IFR — flight and navigational instruments and associated
(2)&NCO.IDE.A.125(a)(2) AMC1 equipment
MEANS OF MEASURING AND DISPLAYING THE TIME
A means of measuring and displaying the time in hours, minutes and seconds may be a wrist watch
capable of the same functions.
NCO.IDE.A.120(a) Operations under VFR operations & operations under IFR — flight and navigational instruments and
(3)&NCO.IDE.A.125(a)(3) AMC1 associated equipment
CALIBRATION OF THE MEANS OF MEASURING AND DISPLAYING PRESSURE ALTITUDE
The instrument measuring and displaying barometric altitude should be of a sensitive type calibrated
in feet (ft), with a sub-scale setting, calibrated in hectopascals/millibars, adjustable for any
barometric pressure likely to be set during flight.
NCO.IDE.A.125 Operations under IFR — flight and navigational instruments and associated equipment
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