'Hydrography -- Indian Navy' ... Naval Hydrographic Department Introduction & Objectives The NHO Methodology Customers & Commitments Training Institute Courses at NHO Electronic Navigation Charts International Hydrographic Co-operation Offshore Development Surveys Coastal Zone Management Customer Request Form Chart Catalogue  Notices to Mariners METHODOLOGY The field surveys are executed by 8 fully equipped Oceangoing Surveying Ships and survey parties as per strict norms for surveys. The Department has plans to have 12 such Ships, apart from Laser Bathymetry systems and separate field caravan survey teams under a 10-year perspective plan for the Department. Data collected by the ships is thoroughly examined at Dehra Dun by the Chief Hydrographer and published as charts and publications in total compliance with the International Chart Specifications and Formats. Computers and Automation towards data collection, analysis, examination and printing are increasingly being used. Constant interaction is being maintained with other National Hydrographic Offices and the IHO to ensure strict standards on products and services. The HRD in tune with technological advances is ensured by updated continuity training.