There weren’t just sailing ships along the harbor front. A couple of submarines were also there. One was an old Russian sub while the other was far smaller but was a research submarine. The Russian sub is a Foxtrot class diesel-electric sub and it is moored a further out on a pier away from the shore. The USS Dolphin was a test and research sub for the US Navy and was involved in much deep diving research and test programs to support the fleet subs. She has a very simple hull shape compared to operational subs. She was only retired in the last ten years and was the longest serving sub in the Navy.