It is possible to speed up construction in several ways:
If an amount of yard space equal to twice the ship’s tonnage is allocated to the vessel’s construction then construction occurs in 75% of the time.
Paying extra for additional material and workers can speed up the construction. For every additional 10% of the cost paid per week, decrease construction time by 10%.
As shown on the construction time table in Book 2: High Guard, any ship constructed after the first of the class has a reduced construction time.
It is possible to build a ship at a maximum of twice the speed given in Book 2: High Guard.