sentences:  HMS Trafalgar (1820)
  
  HMS "Trafalgar" was ordered as a 98-gun second-rate ship of the line, re-rated as a 106-gun first-rate ship of the line in February 1817 and launched on 26 July 1820 at Chatham.She was jointly designed by the Surveyors of the Navy at the time, and was the only ship built to her draught.