ciallaíonn ‘céim réamheitilte’ an tréimhse ón uair a chuirtear plean eitilte isteach den chéad uair go dtí go seachadfar an chéad chead rialaithe aerthráchta;’
“pre-flight phase” means the period from the first submission of a flight plan until the first airtrafficcontrolclearance is delivered;’