I will bow to your expertise.

But in my opinion without knowing the location of the wreck of the USS Housatonic (which was the last confirmed position of the Hunley before the Hunley sank) you have a conundrum. The Housatonic was salvaged in the 1870's and removed from the charts by the 1890's and therefore it position has been lost to history, and you will not be able to determine the relationship between where the Housatonic and the Hunley sank. Whether the Hunley sank near to the Housatonic or survived long enough to move away (by manpower, or even by the tides even if the crew was unconsicious) before sinking.

The Hunley was found with its Bow pointing to Sullivan Island where it was supposed to have signalled it successful mission. A grapling hook was found near the Hunley wreck according to a 2009 AP article which may have served as a anchor for the Hunley. If the Hunley was anchored then it survived the attack.

In either case, those test would still be speculation (with less than a 100% certainty) as to the condition of all the men inside the hull of the Hunley without some corresponding evidence to definitively establish that the Hunley sank almost immediate because of the explosion near the Housatonic wreak site. If the Hunley is proven to have moved away from the Housatonic, for any reason, it will still be assumed to have been under some sort of human control, even if its crew were dead, because those test will not be able to prove that all of they were. The fact that none of the Hunley crew left their duty stations proves only that they stayed at their stations even until death. Since we can not do an autopsy to definately determine a cause of death, whether by drowning, or affixation, or by concussion, or even a combination of all causes, we will still speculate. Certainly whatever happen to the Hunley crew happen to each of them equally.