What a working Babbage engine could change in ship design

How would successful Babbage engines have affected naval design and technology?

They would first accelerate complex calculation, then create an earlier foundation for improved mechanical computing rather than instant CAD or fire control.

A mechanical general-purpose computer would not immediately create computer-aided design or electronic fire control. It would make complex calculations more accessible and establish a platform that other engineers could iterate. The first working engine would begin an alternate development path rather than deliver a finished capability.