A digital sea chart developed by a navy navigation department has lately passed experts' appraisal,  marking another contribution made by Chinese researchers in  the field of human navigation,according to today's Peopledaily.com.

    Digital sea chart is another new technology developed after  radar, satellite positioning and satellite communication technologies.  The chart, which is in form of digitalization, can demonstrate  ocean geographical activities and give a timely transmission ； combined with multi-technologies as computer technology,  multi-media technology, geographical information system, it  makes the ocean information digitalized.

    Information capacity in the chart is quite large, it can  imitate ocean reality. One disc can store hundreds of sea charts.  You can also save data within several seconds. Users can download  the chart on Internet and input data into ship operation system  to operate ship.