The USS Dolphin (AGSS-555) is a unique research submarine of the United States Navy, launched in 1968. It was designed for deep-diving research and testing, capable of operating at depths of over 1,800 feet. The submarine played a crucial role in various scientific studies and technological developments, particularly in underwater acoustics and submarine systems. Throughout its service, the Dolphin contributed to the advancement of submarine technology and was involved in numerous experiments. It was decommissioned in 2006 and is now preserved as a museum ship, allowing visitors to learn about its history and the capabilities of modern submarines like those in the Virginia-class and Los Angeles-class.