IF3700 adopts a high-precision closed-loop fiber optic gyroscope with a full temperature of 0.01°/h and a 20 μg high-precision quartz accelerometer, which can achieve high-precision pure inertial orientation measurement. It has autonomous compass function and can maintain attitude and heading accuracy for a long time without external assistance. It can be used as the main navigation equipment for large unmanned aerial vehicles, unmanned ships, and unmanned submarines, and is widely used in related fields such as aviation, aerospace, and navigation.