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A navigation system is a (usually electronic) system that aids in navigation. Navigation systems may be entirely on board a vehicle or vessel, or they may be located elsewhere and communicate via radio or other signals with a vehicle or vessel, or they may use a combination of these methods. Navigation systems may be capable of: * containing maps, which may be displayed in human readable format via text or in a graphical format * determining a vehicle or vessel's location via sensors, maps, or information from external sources * providing suggested directions to a human in charge of a vehicle or vessel via text or speech * providing directions directly to an autonomous vehicle such as a robotic probe or guided missile * providing information on nearby vehicles or vessels, or other hazards or obstacles * providing information on traffic conditions and suggesting alternative directions == Navigation System in Web == # We have the global, Local, and contextual navigation which will use in a site pages or app screens. # We have suplemental navigation system like sitemaps, indexes and guides. Site maps make bird's-eye view of he information environment, Indexs order content in A-to-Z links and Guides feature linear navigation which is made based on audience, task or topic. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Navigation system」の詳細全文を読む スポンサード リンク
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