Drekar

Viking ship is a collective term for ships used during the Viking Age (793–1066) in Northern Europe. Scandinavian tradition of shipbuilding during the Viking Age was characterized by slender and flexible boats, with symmetrical ends with true keel. They were clinker built, which is the overlapping of planks riveted together. They might have had a dragon's head or other circular object protruding from the bow and stern, for design, although this is only inferred from historical sources.
Viking ships were known for being able to navigate rivers and shoals which other navy's ships could not negotiate. They were also able to handle rough seas, such as the North Atlantic Ocean. They ranged in the Baltic Sea and far from the Scandinavian home areas, to Iceland, Greenland, Newfoundland, the Mediterranean, and Africa.
The ships are normally divided into classes based on size and function.