CHARLESTOWN, Mass. (Jan. 14, 2008) Seaman Nicole Davis shovels snow through a gun port aboard âUSS Constitution. Despite the weather ÒOld Ironside,Ó remained open for free public tours. At 210-years-old, USS Constitution is the oldest commissioned warship afloat in the world, manned by 67 active-duty United States Sailors and visited by nearly half a million visitors annually. U.S. Navy photo by Mass Communication Specialist 1st Class Eric Brown (Released)