The Hunley, nearly 40 feet (12 m) long, was built at Mobile, Alabama, and launched in July 1863. It was then shipped by rail on August 12, 1863 to Charleston, South Carolina. Hunley (then called Fish Boat) sank on August 29, 1863, during a training exercise, killing five members of her crew. It sank again on October 15, 1863, killing all eight of her second crew, including Horace Hunley himself, who was aboard at the time, even though he was not enlisted in the Confederate armed forces. Both times the Hunley was raised and returned to service. On February 17, 1864, Hunley attacked and sank the 1240-short ton (1124 metric tons) screw sloop USS Housatonic on Union blockade duty in Charleston's outer harbor. Soon after, Hunley sank, killing all eight of her third crew. This time, the innovati