Knarr ship designs go back to around the 7th/8th Century, and were indicative to the Norse culture. Developed for trade and commerce, The Knarr was specifically designed for long sea journeys. Their construction was designed so that the maximum cargo space was created (with a smaller ship's crew). Knarr's were around 50 to 60 feet in length and about 15 to 20 feet in height (central Forward Mast). Made of wood, they could displace some 25 tons in the water. This ship was ideal for transport of not only supplies and materials, but livestock (cattle, sheep, goat and horse). The Knarr was very important to Norse colonization effort.