Cobham Regional Services, also known as National Jet Express, or JetEx, conducts scheduled closed charter flights on its regional network and freight services on behalf of Qantas Freight. JetEx operates four BAe 146 freighters on night freight services to and from curfew-restricted Sydney Airport, along with Avro RJ, Embraer E190 and Q400 aircraft in Perth and Adelaide on scheduled closed charter flights for bluechip minings clients. Surveillance Australia, or Special Missions business unit operates a civilian aerial surveillance program on behalf of the Border Protection Command. Cobham Airline Services operated the QantasLink Boeing 717 aircraft, these flights used the "QF" IATA code and the ICAO code "QJE" (call sign 'Q-Jet').