Terminal navigation charges, i.e. the price paid by airspace users, are equal to the total number of service units multiplied by the Terminal ANS Unit Rate.
Calculation of terminal charges are defined in the Article 11 of the charging scheme regulation (EC 1794 / 2006) (all references below refer to articles of this regulation):
- Without prejudice to the possibility pursuant to Article 3(3) of financing terminal air navigation services through other revenues, the terminal charge for a specific flight in a specific terminal charging zone shall be equal to the product of the unit rate established for this terminal charging zone and the terminal service units for that flight. For charging purposes, approach and departure shall count as a single flight. The unit to be counted shall be either the arriving or the departing flight.