When an operator has a series of flights that occur frequently and habitually and possess the same key characteristics, they... moreWhen an operator has a series of flights that occur frequently and habitually and possess the same key characteristics, they can submit a flight plan known as a repetitive flight plan (RPL) for ATS units to utilise repeatedly. ICAO Annex 2 Flight Regulations When flying the same route again, weekly or more often, most airlines use RPL Air Con.