Your emotions are your very own GPS (Global Positioning System), a rock-steady, unfailing and unerring "personal navigational device" to get you where you want to go.

你的情绪是你最好的环球导航系统，一个像石头一样坚定可靠，不会失败，没有偏差，属于你个人的导航设备，会引导你到你要去的地方。

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It thus provides a much improved navigational capability that has only been recently supplanted by modern devices such as the Global Positioning System (GPS).

由此提供了良好的航海能力，直到最近才被全球定位系统(GPS)代替。

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Maritime navigational instruments tend to rely on GPS positioning which employs timing signals broadcast by a constellation of satellites.

BBC: Navigational backup to aid ships in Dover straits