Tel: +86-577-65520898
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Ruian Shunfeng Navigation Instruments Co.,Ltd

Add: No.20, Heping Road, Jinhu Street, Ruian, Zhejiang, China
Con: april Zhang
Tel: +86-577-65520898
Fax: +86-577-65966926
Mob: +8618158321811
Email: sale@rashunfeng.cn


NNSS positioning

NNSS (Navy navigation Satellite system) was the first satellite positioning systems, 1964 in the United States Navy used, 1967 to the outside world. The system has the advantages of global, 24 x 7, high positioning accuracy and automatic display of position and longitude, and overcomes the disadvantages of the above-mentioned radio positioning method. NNSS is widely applied to ship positioning after public disclosure, which is an important means of locating ships in that period. Because the NNSS cannot be positioned continuously, now with GPS input, has been replaced by GPs.