What is meant by departures, arrivals, internals and overflights as presented in DAIO?
For a given country or area, departures and arrivals shall be understood as international departures/arrivals, i.e. respectively going to or departing from a foreign country. Internals are sometimes referred to as domestics. Overflights are flights for which both departure and arrival aerodromes are outside the country considered. This breakdown ensures that no multiple counting is performed.