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Rommel John Miller:

Navigation aside, there are many bridges that people all over the world traverse every day that were designed with slide rules, same with office buildings and similar structures.Of course, with structures, a few more yards of concrete can always be thrown in, or a bit more steel. For that "quick and dirty answer", I submit that the slide rule, stick or circular, still works, likely always will. Batteries not require being perhaps a singular virtue. Considering that the "stick" slide rule has two moving parts, the things are really quite amazing, or so they strike me, an old guy who is perhaps to easily amused.

Alan