100% correct FER! Well done.
Yes looking back at the event in 1947 - Cusk was considered the original "Boomer" far before the keel was laid for the first USSBN. To think that an old Fleet-type submarine would be launching missiles.
Now see that was easy. From the hit count a lot of people looked at my question and FER's answer so I know you are out there looking over posts in this forum. Don't be shy - post, ask questions, or try answering some of these SOB questions.