At last, the paper puts forward embedded system version of car-carried automatic navigation system and an improved version of passive navigation system.

最后还提出了自主式车载导航系统的嵌入式设计方案以及被动式导航的改进方案。

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It is the foundation of gravitational passive navigation and has considerable value on the gravitational map matching and the correction of navigational errors inherent in INS system.

所做的研究是实施重力无源导航定位的基础，对下一步的重力图匹配及导航误差的修正具有重要的意义。

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Global Positioning system (GPS) aided passive imaging navigation system is presented in this paper.

本文介绍的是一种GPS辅助的被动成像导航系统。

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But as wonderful as navigation apps are, they have been about as passive an experience as watching TV, with the key difference of directing most of your focus away from their screens.

ENGADGET: Switched On: A road trip with Siri