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USS CONSTITUTION. The Constitution--called Old Ironsides because cannonballs could not penetrate her tough oak sides--was one of the first of the original six frigates that made up the U.S. Navy. A 44-gun frigate built at the Edmond Hartt Shipyard, Boston, MA, in 1797.
Trending Now. Answers. Best Answer: Designation SS stood for Steam Ship which meant in the days between Robert Fulton to the 1920s the ship's boilers was powered by coal or in the case of riverboats, wood. By the 1920s ships began to use oil and the SS designation began to disappear and give way to M.V. which meant Motor Vessel.