Thank you for your detailed response!
I have reached out to the National Personnel Records Center in St. Louis and I only received one thing, his Notice of Separation from US Naval Service. My confusion is that under the service box, shouldn't it contain any ships he served with? I understand from your post that these Armed Guard Centers weren't really long-term duty stations. However, it is just confusing that if he served on any ships why wouldn't they be listed?
Thank you again,