Official National Hydrographic Portals or ECDIS Manufacturers. Compressed ZIP file containing .HAC and .TNK extensions. Application
: The framework for how the spatial data is structured, ensuring compatibility with national maritime standards.
: Often associated with high-density bathymetric data layers. Download KDS HAC TNK zip
: Because this data is used for critical navigation and may involve sensitive national bathymetry, these ZIP files are usually not publicly available for direct download. They are typically distributed by authorized hydrographic offices (such as the Korea Hydrographic and Oceanographic Agency ) to licensed vessel operators, maritime researchers, or government contractors. Download and Installation Summary Primary Source
: Typically used for "Topographic" or "Tank" (depth-specific) data points that define the seabed's shape. : Often associated with high-density bathymetric data layers
: Downloading these files from unofficial "free" mirrors is highly discouraged as they may contain outdated navigation data that is unsafe for actual sea voyages or contain malicious software targeting industrial systems.
Specialized GIS software (e.g., QGIS with plugins) or Marine Chart Plotters. Download and Installation Summary Primary Source : Typically
Professional Marine Navigation, Surveying, and Dredging Operations.