@georgeob1,
I stand or (sail) corrected. I wrongly assumed that it was the Nautilus because I had recalled that it was one of the first nuke subs.
However, my point is that Carter, not being an unfamiliar layman, should've known how to pronounce the damned word and not make himself sound ignorant. He was, after all, the President and a former naval officer when it was cutting-edge technology.