for the U.S. market. Dove Custom 800 : A customised version of the Dove, carried out by Horton and Horton in Fort Worth, Texas. Typically outfitted with removable bulkheads, various custom interiors were available, including airliner-orientated configurations. Carstedt Jet Liner 600 : Conversions of the Dove, carried out by Carstedt Inc, of Long Beach, California, USA. The aircraft were fitted with two Garrett AiResearch TPE331 turboprop engines. The fuselage was lengthened by to accommodate 18 passengers. Only six aircraft were converted before one aircraft was lost due to a mid-air structural failure. Riley Turbo Executive 400 / Riley Turbo-Exec 400 / Riley Dove 400 : Conversions of the Dove, carried out by Riley Aeronautics Corp in the United States. The aircraft were fitted with two Lycoming IO-720-A1A flat-eight piston engines. Riley conversions were fitted with a taller swept vertical fin and rudder but those retaining the standard DH fin were named Riley Dove 2 . During the late 1960s, Riley Aeronautics, at the Executive Airport in Fort Lauderdale, Florida, did interior refitting work on both the De Havilland Dove and the Heron. Operators Civil operators Airlines of Western Australia Bay of Plenty Airlines MacRobertson Miller Airlines Mandated Airlines Northern Territory Medical Service Royal Flying Doctor Service Southern Airlines Gulf Aviation BIAS SABENA Union of Burma Airways LAN-Chile Cimber Air Falcks Flyvetjeneste West African Airways Corporation LTU West African Airways Corporation Airways (India) Limited Indian National Airways Government of Madras SAATAS East Indonesia Iraq Petroleum Company Nippon Helicopter and Aeroplane Far East Airlines , , and East African Airways Martinair (then called Martin's Air Charter) West African Airways Corporation Central African Airways SATA – Sociedade Açoreana de Transportes Aéreos Portuguese Angola AERANGOL - Aeronaves de Angola ETASA - Empresa de Transportes Aéreos do Sul de Angola SATAL - Sociedade Anónima de Transportes Aéreos Portuguese Cape Verde ACCV - Aero Clube de Cabo Verde TACV - Transportes Aéreos de Cabo Verde Portuguese Mozambique DETA - Divisão e Exploração de Transportes Aéreos Portuguese Timor TAT - Transportes Aéreos de Timor West African Airways Corporation Comair (South Africa) operated 2 aircraft. South African Airways Sudan Airways Airviews Ltd BBC Air BOAC (for training and communications) Bristow Helicopters British Midland British Westpoint Airlines Channel Airways (scheduled services) Dan-Air (scheduled services) Hunting Aerosurveys Ltd Hunting-Clan Air Transport Melba Airways Morton Air Services Olley Air Services Silver City Airways CAA Flying Unit Air Wisconsin Apache Airlines Catalina