Electrostatic-Suspended Gyroscope (ESG) is the most precise gyroscope in world nowadays. Using ESG to develop north finder is for the most precise north finder.

• 静电陀螺仪是当今世界上精度最高的陀螺仪，研制静电陀螺寻北仪是为了寻求高精度的方位测量仪器。