And the world has more than 100 countries and area navigation.

已和世界100多个国家和地区通航。

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Secondly, this thesis investigates the designing methods for VOR/DME-based area navigation flight procedure (RNAV FP).

其次，研究了基于VOR/DME导航台的区域导航飞行程序的设计方法；

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FMS whose key questions are generation and realization of optimum flight trajectories are synthesized by area navigation systems and performance management systems.

飞行管理系统是区域导航系统和性能管理系统的高度综合，其核心问题就是优化飞行轨迹的生成和实现。

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From a consumer standpoint, we definitely have reached a tipping point in the area of vehicle navigation.

ENGADGET: The Engadget Interview: Christian Bubenheim, general manager, Magellan Consumer Products

Mr Clark, who has been flying planes for 50 years, the area had "important navigation features" such as the motorway and the River Severn.

BBC: Pilot worry at Bristol wind turbine plan

Regarding the South China Sea issue, Kissinger said that freedom of navigation in the area, in which the US has claimed national interests, is a separate issue apart from the territorial disputes between countries in the region.

FORBES: Kissinger: US-China Not Competing for World Domination