As the name suggests, Microsoft Flight Simulator 2004: A Century of Flight, is that year's version of the popular simulator from Microsoft and celebrates 100 years of flight. Flight Simulator 2004 includes 9 historical aircraft such as the Wright Flyer from 1903, DC-3, Vickers Vimy, Curtiss Jenny and the Ryan NVP 'Spirit of St. Louis’ that you can pilot and new challenges centered around the historical aircraft. It includes a new help system called 'Learning Center' and an improved ATC, and a new dynamic weather system. The GPS systems in Flight Simulator 2004 have been completely overhaulled and are now based on real world Garmin 500/295 GPS systems.