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H.L. Hunley

Matthew Young, National Civil War Naval Museum at Port ColumbusJeffery Seymour, National Civil War Naval Museum at Port Columbus
H. L. Hunley
The H.L. Hunley was the first submarine to successfully sink an enemy ship in combat and was a remarkable vessel for the time in which it was constructed. The boat accurately reflected both the dangers and advantages to attacking enemy ships with underwater explosives. In February 1864, the Hunley launched from Sullivan's Island and attacked and sank the 1,800-ton steam-powered sloop-of-war USS Housatonic about two and a half miles out. Five crewman died on the Housatonic, but the Hunley sank with all hands. The submarine remained on the ocean floor until it was recovered in August 2000. The remains of all eight crewmen were found inside the submarine and were interred in Charleston's Magnolia Cemetery in 2004.
The Hunley was the third submarine vessel to be constructed under the direction of riverboat captain James McClintock, engineer Baxter Watson, and lawyer Horace Lawson Hunley, whom the boat was eventually named after. The first submarine, Pioneer, was constructed in New Orleans in late 1861 and early 1862. It was tested in the Mississippi River in February 1862 and was later taken to Lake Pontchartrain for further testing. It had to be scuttled in April when Union admiral David Farragut's fleet advanced upon the city of New Orleans.
James R. McClintock
The group moved its operations to the Park and Lyons Machine shop in Mobile, where staff built a second submarine, the American Diver, sometimes referred to as the Pioneer II. The submarine's development was supported by the Confederate Army, which assigned British-born Lieutenant William Alexander of the Twenty-first Alabama Infantry to assist in the project. McClintock, Watson, and Hunley were among a group of developers and financiers in Mobile that was promised half of any valuable assets captured with the help of their inventions.
The group experimented with electro-magnetic propulsion, which was based on a primitive form of battery, as a means of propelling the boat, but the designers could not develop an engine powerful enough to move the boat through the water. In a letter to Matthew Maury, McClintock stated that the only alternative was to try a system powered with a hand crank. The submarine was ready for trials by January 1863, but it proved to be too slow and cumbersome to be of any practical use. The American Diver sank at the mouth of Mobile Bay during a storm in late February 1863 and was not recovered.
McClintock's group began construction on the Hunley shortly after the loss of the second submarine. Early in its construction, the vessel was known as "the fish boat" or the "fish torpedo boat." The builders at the Park and Lyon's machine shop in downtown Mobile, where the boat was built, had learned much from the failures of the first two submarines and incorporated design changes into the third submersible. The Hunley was almost 40 feet in length, with a beam (width) of almost four feet and weighed approximately seven and a half tons. The submarine was powered by a hand crank that ran down the center of the boat and was attached to a propeller in the rear by a chain. The vessel was designed to carry a crew of nine, with eight on the crank shaft to power it and the ninth stationed in the forward bow to control dive planes, ballast, and navigation. The Hunley was privately financed, with a total cost of $15,000 for construction, none of which came from the Confederate government.
Parks and Lyon's Machine Shop
The submarine was launched into the harbor at the Theater Street Dock in Mobile in July 1863, and the crew immediately began testing exercises. The builders were satisfied with the performance of the boat and decided to arrange a demonstration of the submersible's capabilities for Admiral Franklin Buchanan, the Confederate naval commander in Mobile. On July 31, 1863, a coal barge was towed to the middle of Mobile Bay and anchored as a test target for the submarine. The Hunley was armed with a floating contact torpedo (what we today call a mine) that was towed behind the submarine by a long rope. The vessel approached its target, dove underneath it, and dragged the torpedo into the hull of the barge. After the successful test, the military authorities in Mobile decided to ship the Hunley by rail to Charleston, South Carolina, where the Union fleet was bombarding the city on a daily basis.
The submarine arrived in Charleston on August 12, 1863, and the crew engaged in several training missions with McClintock in command. However, military authorities determined that McClintock was not aggressive enough and by August 24th, the small ship had been seized by the Confederate authorities in Charleston and placed under the temporary command of the Confederate Navy. Navy lieutenant John A. Payne of the ironclad CSS Chicora was placed in command of the Hunley and a crew of seven volunteers from the Chicora and another Confederate ironclad, the CSS Palmetto State. The men tested the boat during the day, but none had experience in a submarine before. On August 29, after only five days of training, Lieutenant Payne accidentally engaged the dive planes on the boat while the top hatches were open, and the submarine began to flood. Lieutenant Payne and two other crewmen escaped, but the five remaining crewmembers were stuck in the craft and drowned. It was an inauspicious start for the navy career of the Hunley.
Pierre G. T. Beauregard
After several days, the boat was recovered, and General P. T. Beauregard, senior Army commander at Charleston, gave command of the craft to Captain Horace Lawson Hunley, one of the original investors and developers of the project. Hunley had little practical experience in piloting the craft, however, because he was in Mississippi for the majority of the time the craft was being constructed in Mobile. Nevertheless, he and a volunteer crew from the Parks & Lyon's shop in Mobile were named as new crew of the vessel.
Around the beginning of October 1863, the men of the second crew began two weeks of training on the submersible. On the morning of October 15, Captain Hunley commanded the boat as she made several practice dives near the CSS Indian Chief anchored in the Cooper River. The boat dove under the Indian Chief but never resurfaced, sinking with all hands, including Captain Hunley. Despite the loss of the second crew, the Confederate Navy began a salvage operation immediately the following day. After being submerged for several days, the boat was recovered and renamed in Hunley's honor.
The submarine was placed under the command of First Lieutenant George E. Dixon, of Company A of the Twenty-first Alabama Infantry. He was charged with enlisting another crew, cleaning and refitting the boat, and carrying out a successful attack against the Federal blockade off the coast of Charleston. He named Lieutenant William Alexander his executive officer and the two proceeded to raise a third crew for the Hunley, many of whom had served on the Indian Chief, the same ship that had witnessed the Hunley's sinking.
H. L. Hunley Diagram
Despite the submarine's previous failures, there was no shortage of volunteers, and Dixon and Alexander chose the most able-bodied men for the crew. By early December, the new crew had been assembled and began extensive training, day and night, on the submarine. During this trial period, the armament of the craft was modified so that the torpedo was mounted on a forward spar rather than towed from behind. This change meant that there was no longer a danger of the torpedo accidentally drifting into the Hunley during a combat operation and destroying the submarine. Because of the two previous accidents, General Beauregard ordered that the vessel operate completely above the water, except when it was preparing to attack.
By the middle of February, six months and two sinkings after her arrival in Charleston, Lieutenant Dixon was finally ready to engage an enemy ship. On the evening of February 17, 1864, the Hunley left its base at Breach Inlet on Sullivan's Island and made its way into open waters in search of a target. Lieutenant Dixon most likely selected the USS Housatonic because of its close proximity to Sullivan's Island, being only between two and a half to three miles off shore.
After an hour and a half, the small submarine finally reached the Housatonic and began its run at the ship. The officer of the deck spotted the Hunley as she approached the sloop-of-war and ordered the crew to fire on the submarine with rifled muskets and even a double-barreled shotgun. These projectiles bounced harmlessly off the iron hull of the submersible, however, and she rammed into the Housatonic with the spar-mounted torpedo loaded with 135 pounds of gunpowder. The torpedo stuck into the side of the ship as the Hunley quickly reversed course.
USS Housatonic
When the lanyard (a thin rope attached to the fuse) was pulled tight, the torpedo exploded in the stern of the Housatonic, perhaps even igniting some of the 7,000 pounds of gunpowder in the stern powder magazine onboard the ship. Within minutes, the Housatonic had sunk to the bottom, her large masts protruding above the shallow water line. Five crewman on the Union ship were killed, but the rest were either able to get to life boats or were rescued by other blockading ships that came to her aid.
Contemporary accounts suggest that the Hunley survived her encounter with the Housatonic, as several men reported spotting a blue light, the signal for a successful attack, shortly after the explosion aboard the Housatonic. But the Hunley never returned from its mission. Once again, the submarine had sunk with all hands, and its location remained a mystery for more than 100 years, despite immediate recovery attempts.
Interest in the Hunley continued after the war. During the early twentieth century, famed showman P.T. Barnum offered the monumental reward of $100,000 to anyone who could find it, but no one ever claimed the prize. It was not until 1970 that underwater archeologist E. Lee Spence claimed to have located the site of the Hunley wreck, but he had a difficult time proving it. Diver Ralph Wilbanks claims to have officially discovered the wreck in April 1995 while leading a dive team searching for the remains of the boat.
On August 8, 2000, a large team of professional underwater archeologists with the assistance of the federal government and the state of South Carolina raised the remains of the Hunley with the barge Karlissa B. There was great debate in the state as to who should take charge of the submarine and where it should be displayed. The recovery effort ended when the boat was sent to the Warren Lasch Conservation Center at the old Charleston Navy Yard and placed in a specially designed facility to conserve the vessel.
During the conservation, the remains of the eight crewman were recovered, and all were found in their assigned positions onboard the vessel, suggesting that there was no panic at the time the boat went down. The reason for the submarine's sinking after its attack on the Housatonic remains a mystery. There is some evidence to suggest that the men did not drown, but rather suffocated from lack of oxygen, and that the Hunley may have remained airtight for some 30 years after the attack on the Housatonic.
On April 17, 2004, the men were buried in Magnolia Cemetery in Charleston next to the other crewmen who had drowned on the submarine some 140 years earlier. The Hunley remains at the Warren Lasch Conservatory at present, and visitors can view the submarine on weekend tours. The building that housed the Park and Lyons Machine Shop still stands on the corner of Water and State streets in Mobile.
In 2015, technicians completed the removal of the encrusting rust and other sediments that encased the vessel, allowing researchers to view the hull and its components for the first time. Investigations into the accident that sank it.
Additional Resources

Conlin, David L., ed. USS Housatonic Site Assessment. National Park Service, Naval Historical Center, South Carolina Institute of Archaeology and Anthropology, 2005.
Hicks, Brian, and Schuyler Kropf. Raising the Hunley. New York: Ballantine Books, 2002.
Ragan, Mark K. The Hunley. Orangeburg, S.C.: Sandlapper Publishing, 2006.
Still, William N., Jr., ed. The Confederate Navy. Annapolis: Naval Institute Press, 1997.
Published:  October 24, 2007   |   Last updated:  March 4, 2015