Clinker (boat building)
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Clinker-built, also known as lapstrake-built, is a method of boat building in which the edges of longitudinal hull planks overlap each other.
Diagram of clinker construction in the first half of the 20th century
Clinker built dinghy showing some of the basic structural details. The single rowing thwart supports the after end of the centre-board case. The pairs of knees at each end of the thwart can be seen; also the longitudinal stringer (rising) on which the thwart rests.
The Nydam boat, an early example of clinker construction.
The Gokstad Ship, a Viking longship, displaying the overlapping planks that characterize clinker construction.
Cog (ship)
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A cog is a type of ship used during the Middle Ages, mostly for trade and transport but also in war. It first appeared in the 10th century, and was widely used from around the 12th century onward. Cog
Clinker (boat building)
…and Scandinavians in the early middle ages, and later in the Basque shipbuilding region where the Newport medieval ship was built. It was also used in cogs, the other major ship construction type found in Northern Europe in the latter part of the medieval period. UNESCO named the Nordic clinker boat tradition…
A replica of the Bremen cog
Cross-section of hull; note the lower mast stepped and braced
The reconstructed Roland von Bremen based on the wreck of a cog from around 1380
Reconstructed excavated cog from 1380 at Deutsches Schiffahrtsmuseum