System, navigation, Beidao, or system, satellite navigation, Beidao (Compass) project by China to develop system of satellite navigation is independent. The first system, Beidao, which is the official system demo, satellite navigation, Beidao, or Beidao-1. ... consists of three satellites with coverage and applications is limited. This system, from 2000, the navigation services mainly for customers in China and neighboring areas. offers. The second generation of this system is called the compass or Beidao-2 is known, and a system Global Navigation Satellite consists of 35 satellites, will be, still under construction. This system in China in December 2011 with 10 satellites, began and is scheduled until the year 2012 to the Asia-Pacific and by 2020 the total land services.