" the submarine sank a Union warship. then disappeared, it sank with all hands - probably from lack of oxygen. it's engine was the crew hand cranking a prop.  Found again a few years ago & recovered" 
 
 
Regarding the Hunley submarine, they are now pretty confident that the crew died of shock from the explosion. Their weapon was a bomb on the end of a spar so the shock wave ran straight into the crew compartment and killed them outright. RIP.
		 
		
		
		
		
		
		
		
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