An aeroplane subject operating under the visual flight rules (VFR) by day is subject to the following instrument carriage requirements:
- indicated airspeed;
- pressure altitude;
- magnetic heading;
- Mach number — but only for an aeroplane with operating limitations expressed in terms of Mach number;
- turn and slip — but only for an aeroplane conducting an aerial work operation;
- outside air temperature — but only for an aeroplane conducting an aerial work operation from an aerodrome at which ambient air temperature is not available from ground-based instruments.
Specifications – Specific Instruments
The pressure altitude instrument must:
- have an adjustable datum scale calibrated in millibars or hPa; and
- be calibrated in ft, except that, if a flight is conducted in a foreign country which measures FLs or altitudes in metres, the equipment must be calibrated in metres, or fitted with a conversion placard or device.
The magnetic heading instrument must be:
- a direct reading magnetic compass; or
- a remote indicating compass; and
- a standby direct reading magnetic compass.
The time instrument must:
- display accurate time in hours, minutes and seconds; and
- the equipment must be:
- fitted to the aircraft; or
- worn by, or immediately accessible to, the pilot for the duration of the flight.