Overview
ShipWreck04 is a Valheim world location that spawns in the black forest, swamp, plains, and ocean biomes, identified internally as ShipWreck04. World generation places up to 25 per world, with terrain constraints (max delta 10, altitude from -1 to 1), and an exclusion radius of 10m, which is why some seeds have far more of them than others.
About
ShipWreck04 is a wrecked Karve longship variant on Black Forest coastlines, with similar loot to ShipWreck01.