The Liberty ship and submarine are located at Pier45 in San Francisco. The S.S. Jeremiah is a huge WWII ship. Most of the areas are blocked off to tourists, but you can walk freely around the engine room and some other upper floor areas. The Pampanito is a very cramped area, given it is a submarine. Almost all areas are blocked off to the public except a straight walkthrough of the top floor.
Neither vessel had any EMF activity or any type of personal experience.