Before revision: ells (0.63–0.7 m) Average draft: 6 feet (1.8 m) History 300x300px|A drawing of a floating water castle (kotta mara) from Hachelijke reys-togt van Jacob Jansz de Roy.
After revision: ells (0.63–0.7 m) Average draft: 6 Rijnland feet (1.884 m) History 300x300px|A drawing of a floating water castle (kotta mara) from Hachelijke reys-togt van Jacob Jansz de Roy.