What is cog ship?

A cog ship is a type of medieval sailing vessel that was commonly used for trade and transportation in the 12th to 14th centuries. Cog ships were sturdy and versatile, with a flat bottom and a single mast carrying a square sail. They were equipped with a central rudder for steering and had a capacity of around 100 to 250 tons.

Cog ships were often used for carrying goods such as grain, wool, timber, and other commodities across the seas and rivers of Europe. They were known for their seaworthiness and were able to navigate both coastal waters and open seas.

The design of the cog ship evolved over time, with later versions incorporating more advanced features such as multiple masts and larger cargo holds. Cog ships played an important role in the development of maritime trade and transportation during the Middle Ages and were a common sight in ports and harbors throughout Europe.