0837.7z File
According to technical archives like the TU Darmstadt OpenStreetMap Mirror , this specific file contains:
: Based on OpenSeaMap data, which is a sub-project of OpenStreetMap focused on nautical information. 0837.7z
It is part of a historical archive of chart data used by mariners and navigation software. Primary Content: Nautical Charts According to technical archives like the TU Darmstadt
: Raster navigation charts used in marine GPS applications. 0837.7z