HELLFIRE https://www.livescience.com/archaeology/american-submarine-lost-for-over-a-century-discovered-remarkably-intact-off-the-coast-of-san-diego … The USS F-1 submarine sank in seconds after it was badly damaged in a collision with another U.S. Navy submarine. Nineteen of its crew drowned in the accident, and three were rescued by the other sub. The sub wreck was located by accident in the 1970s, but the expedition to the site earlier this year by researchers from the Woods Hole Oceanographic Institution (WHOI) and the U.S. Navy was the first time it had been surveyed with high-resolution imaging since the sinking. … Regards