Marlinespike seamanship (or marlinspiking), is the art of hanling and working all kinds of natural fiber, synthetic fiber, and wire rope. So named because it often involves use of a marlinspike, it generally covers all types of knot tying, splicing of cordage, sail repair, and fancy ropework. In the 16th, 17th, and 18th centuries the skill of a sailor was often judged by how well he knew knots and marlinespike seamanship. Skilled seamen bartered and traded fancy knotwork knowledge among themselves as intellectual property. Particularly good examples of ropework and ships showing such work would be described as being "shipshape and Bristol fashion" after Bristol, UK based ships that were noted for their ropework.