What would they be for? The Iowas were recommissioned because the USN was in dire need of command facilities. Something as old as the Gustav V has neither the space, nor the generating capabilities to provide that. And why would the Swedes be interested anyway? They're in the enviable position of being able to put their command facilities in deeply buried bunkers that are immune to just about anything short of a firect nuclear strike.
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“Close” only counts with horseshoes, hand grenades, and tactical nuclear weapons.
That which does not kill me has made a grave tactical error
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