Quanzhou (ca. 1272)
This large vessel was discovered during the dredging of a canal. It was dismantled, then moved and reassembled in a museum in Quanzhou. The hold was divided into thirteen compartments by twelve bulkheads. A half-frame was nailed to the lower edges of each bulkhead except the aftmost; the planking was originally nailed to these half-frames, although on the present reassembly they are nailed directly to the bulkheads. Frames were in poor condition and no dimensions were given for them. Steps for two masts laid athwartships over the keel centerline. Planking was double-layered from the keel to the tenth strake, then triple-layered from the tenth strake to the main wale. Plank edges are alternately carvel-rabbeted for two strakes and clinker rabbeted for two more, then the progression repeats. In other words, three forms of seam alignment are employed—flat (carvel), rabbeted carvel, and clinker. All planks are cedar. Inner planks are 8.0 cm thick, the second layer is 5.0 cm thick, and the third layer (starting at the turn of the bilge) is 2.5 cm thick. No parallels for this type of construction have been excavated so far. 1
1. Richard Steffy, INA Shipdata Project, Texas A&M University.