The CSA Hunley was one of a kind. It did have a snorkel for air, and was never completely submerged. The Hunley accomplished its mission by sinking the Union ship. They're still trying to figure out what happened after the attack, and why they sank. They're still examining it at the conversancy.
The crew are all buried in Charleston's Magnolia Cemetery.
They had a huge funeral for them, with a lot of reenactors.
https://www.youtube.com/watch?v=oOSVos79rnI
(No captions but there's no voice over; just music.)
Hunley sailors images