Sigma Service deals with the purchasing and selling aviation equipment, namely: airplanes, helicopters, spare parts, materials, avionics consists of multipurpose navigation devices, global position systems, radio compass, traffic collision avoidance systems, weather radars and other airborne equipment to Russian airline companies as well as delivers domestic aircrafts to foreign customers; performs representative services in delivering aircrafts and helicopters to the companies dealing with production, repair and operation of aeronautical engineering.