Application of GNSS integrated technology to safety of inland water navigation

In the paper the description of some applications of satellite integrated technology, elaborated in the Chair of Satellite Geodesy and Navigation of University of Warmia and Mazury in Olsztyn, to bathymetric survey of Great Masurian Lakes is given. The Lake of Sniardwy, the largest lake in Poland with about 11,000 ha has been measured using this modern technology with precise satellite positioning of underwater stones and shallow waters dangerous for sailors. Next the numerical map was elaborated and edited for sailors, fishermen and tourists. Some conclusions and recommendation for future works on inland navigation charts are also given.