Well, that's gonna make running silent more difficult, as an old US sub trick was to run on one screw only, even though it reduced speed to between 1/4 to 1/2 knot.
And then with the boats that had 4 diesels, there are a few different configurations for surface running. Really helps when you need to conserve fuel.
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A legislative act contrary to the Constitution is not law.
-John Marshall Chief Justice of the Supreme Court
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