The dock is one of the key elements of shipbuilding.The level of the dock also affects the time required for shipbuilding. A good dock is the key to fast shipbuilding.
Every time a ship is built, durability is lost. Durability can be restored through maintenance. In the harbor plunder battle, if your harbor is plundered ,the durability of the dock will also decrease.
The dock can gain exp through shipbuilding.
With the increase of exp, the level of the dock can be improved. High level docks can increase the speed of shipbuilding.