/kloc-how to build ships in the late 0/9th century?

/kloc-the second half of the 0/9th century was a turning point in shipbuilding, with the appearance of traditional wooden ships, iron ribbed wooden hulls and all-steel ships.

Traditional wooden sailboats need to cut down a lot of logs, which is time-consuming and laborious, and it takes a long time to dry the wood in the shade (up to 2-3 years). /kloc-in the 0/9th century, they began to steam wood mechanically, and the hull was covered with copper to slow down the erosion.

Because the keel and ribs need complete and solid all-wood, which is expensive and difficult to obtain, the iron-ribbed wooden hull ship appeared after the industrial revolution, which saved the cost and strengthened the hull structure, making it possible to fly shear ships at high speed.

All-steel ship is built on the basis of large steel industry and steam engine with sufficient power. At this time, riveting technology was used to build ships (welding was not yet mature)