The Air Navigation (Carbon Offsetting and Reduction Scheme for International Aviation) Order 2021

Method B U.K.

4.—(1) The aeroplane operator must use the following formula to compute fuel use according to Method B(1)—

where—

• F_N = Fuel used for the flight under consideration (i.e. flight _N) determined using Method B (in tonnes);

• R_N–1 = Amount of fuel remaining in aeroplane tanks at the end of the previous flight (i.e. flight _N-1) at Block-on before the flight under consideration (in tonnes);

• R_N = Amount of fuel remaining in aeroplane tanks at the end of the flight under consideration (i.e. flight _N) at Block-on after the flight (in tonnes); and

• U_N = Fuel uplift for the flight considered measured in volume and multiplied with a density value (in tonnes)(2)(3).

(2) The aeroplane operator performing on an ad-hoc basis flights attributed to another aeroplane operator must provide to the latter the fuel measurement values according to the Block-off/Block-on method.

(3) Where an aeroplane does not perform a flight previous to the flight for which fuel consumption is being monitored (e.g., if the flight follows a major revision or maintenance), the aeroplane operator may substitute the quantity R_N-1 with the amount of fuel remaining in the aeroplane’s tanks at the end of the previous activity of the aeroplane, as recorded by technical logs.

Commencement Information

I1 Sch. 2 para. 4 in force at 26.5.2021, see art. 1

(1)

For ensuring completeness of the data, it is important to note that not only data generated during the flight under consideration (i.e. flight _N) is needed, but also data generated from the previous flight (i.e. flight _N-1). This is in particular important when a domestic flight is followed by an international one, or vice versa. For avoiding data gaps, it is therefore recommended that, the amount of fuel remaining in the tank after the flight or the amount of fuel in the tank after fuel uplift is always recorded on flights of aeroplanes which are used for international flights. For the same reasons, fuel uplift data for all flights of those aeroplanes should be collected, before deciding which flights are international.

(2)

See article 28 for requirements on fuel density values.

(3)

Fuel uplift is determined by the measurement by the fuel supplier, as documented in the fuel delivery notes or invoices for each flight; see Attachment C-4 in Volume IV of Annex 16 to the Chicago Convention for a process diagram for collecting the required data to implement Method B.