You've probably already seen it, but there's a classic US Navy training film which talks about how they were used to solve differential equations in battleships

You've probably already seen it, but there's a classic US Navy training film which talks about how they were used to solve differential equations in battleships around the WWII era. https://youtube.com/watch?v=gwf5mAlI7Ug https://youtube.com/watch?v=gwf5mAlI7Ug