Hydrographic Survey Wing conducts hydrographic survey of sea, inland water bodies, reservoirs etc as and when requested for by other departments, agencies or private sector undertakings. The data received after survey work from the Range Offices are checked, compiled, computed and processed in the office of the Chief Hydrographer and finalize the Survey Charts and Reports.  Hydrographic Survey Wing collects all hydrographic data and forward to the National Hydrographic Office for updating Navigational charts.