Midship sections of Northern European Clinker-built Boats

 

Top Left -- Hjortspring Boat - (c. 300 BC);

Top Right --Nydam Boat -(8th to 9th century);

Second Row Down - Osberg Boat - (9th to 10th century);

Third Row down -- Gokstad Boat - (9th to 10th century);

Fourth Row Down -- Ladby Boat - (c. 1000 AD).

Reference:

R.W. Unger, "The Ship in the Medieval Economy, 600-1600," Croom-Helm , McGill-Queen's University, Montreal, 1980, P.84