Evan Lubofsky, writing originally for Hakai Magazine but also published in Smithsonianmag.com writes of an inquiry into the sinking of the H. L. Hunley, the Confederate submarine. Definitely worth the read
Around 6:30 p.m. on February 17, 1864, eight men crammed into the Confederate submarine H. L. Hunley, a self-propelled metal tube attached to a bomb, and slipped quietly into the freezing black water off the coast of Charleston, South Carolina. The crew hand-cranked the sub more than six kilometers toward its target—the Union blockader USS Housatonic—and surfaced like a leviathan for the charge. By 9:00 p.m., it was over: The Hunley had thrust its spar-mounted torpedo into the Housatonic’s hull and within seconds, 60 kilograms of black powder had caved in the ship.
Just after the brief moment of glory, the Hunley, which had just become the world’s first successful combat submarine, mysteriously sank.