A Difference Engine would bring 1940s fire control into the 1890s

How would a Difference Engine-style fire-control computer affect the 1890s Royal Navy?

It would give Victorian ships the core calculating capability of 1940s mechanical fire control.

The fictional machine is translated into a real naval function: continuously solving the geometry needed to aim guns at a moving target from a moving ship. Second World War fire-control tables performed that work with mechanical computation. Giving an equivalent device to the 1890s Royal Navy would leap across decades of development in prediction and centralized control. Its value would come from better solutions and coordination rather than increasing the raw power of the guns.