I'd agree - that's one of the reasons for having two screws, the ability to crudely steer without rudder input. Remember that this was one of the notorious failings of the Bismark - her 3 screw configuration did not allow for effective emergency steering with the outboard propellers alone.
There should at least be some sort of ability to "emergency return to nearest port" or such, so you don't loose the whole patrol and career. At least as long as diesel power was still intact, the screws still able to turn, and the hull not flooding beyond control.
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