Polaris missiles would have been deployed to these ships by americans only in the event of war. Would there been US or Italian crew to operate the missiles, that I don't know....
I had never heard that. How did they fit them on board? I'd assume they went quite a ways below deck.
There were reports that NK could put their IRBMs on some merchant ships, get within range and strike the US- if diesel submarines could do it, why not surface ships that are even bigger?