During the [[High Middle Ages]] it was similar to the contemporary ''[[cog (ship)|cog]]'', but by the 15th century it had overtaken its competitor in both capacity and importance. It finally developed into a [[carvel]] built, sometimes keel-less, three masted, full-beamed (usually a length to width ratio of 3:1) ship of up to about 400 tons, suitable for the relatively shallow waters of its region. | During the [[High Middle Ages]] it was similar to the contemporary ''[[cog (ship)|cog]]'', but by the 15th century it had overtaken its competitor in both capacity and importance. It finally developed into a [[carvel]] built, sometimes keel-less, three masted, full-beamed (usually a length to width ratio of 3:1) ship of up to about 400 tons, suitable for the relatively shallow waters of its region. |