I can't speak for the other museum boats, but the USS Torsk, will never get under way on her own power. While we were in the shipyard in February and March, we had the second of our two screws removed. We teamed around the Baltimore Harbor, but it was under tow. The screws were removed to fight electrolytic corrosion, which occurs when two dissimilar metals (bronze/brass and steel) come in contact with each other. By removing the bronze screws a huge source of the corrosion was removed.