An NK ‘first strike’ better occur before ‘16, because it would be suicide.
That stated, it’s a waste of time (missile tubes) for that purpose: A sub is a perfect delivery system if the intent is the prior...
So you are thinking the Norks are going to have stealth tech subs our attack boats won’t be right behind from day one?
The Norks better stick with their friends, the Iranian’s Magic Carpets.