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Gerardus Mercator's projection, published in 1569, was immediately useful because it depicts a line of constant bearing as a straight line, which is handy for Marine navigation.

福西厄斯•墨卡托的投影于1569年问世，马上就派上了用场，因为它把不变的方位描绘为直线，这对航海非常方便。

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Path planning is also one key aspect in virtual reality engine. One of its application automatic navigation of virtual camera is a useful technique, and worth studying.

路径规划也是虚拟现实引擎里一个重点，其中虚拟场景中的摄像机自动导航是一个具有实用价值的研究方向。

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He added that the robot's ability to follow a person made it "an interesting navigation machine which might end up useful in other domain, such as search and rescue".

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Well, PocketNow got their hand on the top-end iCN 750 in-car navigation system to see just how useful downloading location-mapped pictures can be.

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With GPS in mobiles as standard, years ahead of the UK, the keitai has also evolved into a seriously useful navigation tool here.

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