: Downloading these files from unofficial "free" mirrors is highly discouraged as they may contain outdated navigation data that is unsafe for actual sea voyages or contain malicious software targeting industrial systems.
: These ZIP files are primarily used in Electronic Chart Display and Information Systems (ECDIS) or specialized GIS (Geographic Information System) software. They contain high-resolution bathymetric data used to generate safety contours and depth information for maritime navigation. Key File Components : Download KDS HAC TNK zip
: Often associated with high-density bathymetric data layers. : Downloading these files from unofficial "free" mirrors
: Typically used for "Topographic" or "Tank" (depth-specific) data points that define the seabed's shape. Download KDS HAC TNK zip
Official National Hydrographic Portals or ECDIS Manufacturers. Compressed ZIP file containing .HAC and .TNK extensions. Application