文章通过简要描述“中文雅虎”和“航海导航”引擎的特性，揭示了搜索引擎内在本质。
The paper announces the inherent nature of search engineer by briefly describes "Chinese yahoo" and "navigation" engineer's feature so that the users know.
它以低价位高清晰度的优势被广泛应用于军事武器、航海导航、工业监控、交通管理等领域。
The system has been applied in the field of weapons, shipping navigation, industry monitor and traffic control because of its low cost and superior visibility.
首先，根据GPS航海导航系统的需求设计了系统整体方案，深入研究了影响导航精度的主要因素。
At first, based on the requirements of GPS Marine navigation system, the whole system framework is designed. Then the main factors that affect navigation precision are investigated deeply.
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