Steve , In St Mary's GA they have a great Submarine Museum with a working Periscope
, if you want to chat with some old submariners they would probably be able to answer your questions and Kingsbay Naval Sub Base is located near there also. Ft Clinch State Park in Fernandina Beach,FL is a great site to watch the submarines come and go out to sea from the parapets of a 160 yr old fort