 
  
Although Swedish inventor John Ericsson submitted plans to Napoleon III in 1854 for an “impregnable battery” that included a revolving cupola, it wasn’t until 1861 that Ericsson’s plans for such an ironclad ship were accepted by the US Navy Department.

 USS Monitor was launched from Continental Iron Works in
USS Monitor was launched from Continental Iron Works in Shortly afterwards, on
Discovered in 1973
In Beaufort, a monument honoring John G. Newton, the Duke University Marine Laboratory team leader involved in the 1973 discovery of the long-sunken Civil War Union ironclad Monitor, was dedicated March 9, 2002, the 140th anniversary of the historic vessel's battle with its rival Confederate ironclad Virginia (originally Merrimack before its capture and refitting).
 Newton, who died in 1984 at the age of 52, led the group aboard the marine lab's former research vessel Eastward that discovered Monitor on Aug. 27, 1973, lying upside down in 230 feet of water about 16 miles off Cape Hatteras.
Newton, who died in 1984 at the age of 52, led the group aboard the marine lab's former research vessel Eastward that discovered Monitor on Aug. 27, 1973, lying upside down in 230 feet of water about 16 miles off Cape Hatteras.
"Before our first week was over, we had picked up 21 targets," Newton 
It would take another five months of post-discovery study, plus a second site visit in April 1974, to unquestionably identify the wreck.
______________________________
Monitor was listed on the National Register of Historic Places in October 1974 as a resource of national significance. On January 30, 1975, Monitor became the first National Marine Sanctuary under Title III of the Marine Protection, Research and Protection Act of 1972.
Wool coat that sank with ironclad Monitor is nearly revived 
 
|  | 
| The Union jacket is again recognizable despite 140 years submerged inside the Monitor’s turret, which was recovered in 2002. (Jonathon Gruenke / Newport News) | 
