With the development of hydrographical work and information techniques, digital charts are more and more popular in
maritime applications, and an embedded product--PDA (personal digital assistant) is widely used in navigation for its
smallness and portability. However, there is lack of PDA-based product which can provide integrated data management,
real-time alternate display and ship auto-track application based on traditional paper chart and s-57 ENC. Aiming at this,
some new techniques and algorithms including integrated spatial data management and display mode for ENC and paper
chart, multi-scale data organization, embedded chart navigation method based on GPS are presented. And the integrated
electronic chart pocket navigator system (PNS) based on PDA was developed.
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