"With the Implacable. 6 October 1944, Portsmouth, on Board the 150 Year Old Trafalgar Veteran Dugay-trouin, Now the Training Ship HMS Implacable. Extra Accommodation For the Navy Trainees Is Given in the Foudroyant, 120 Years Old Corvette, Which Lies Alongside the Implacable." The Commanding Officer of the IMPLACABLE, Lieut Cdr F D O'Brien, RN, Plymouth, in the Great Cabin, once used by French and British sea captains of Nelson's day.