Ulick Jennings served in the Royal Navy.
• As Fourth Lieutenant of Powerful, 74 (Captain William O'Brien Drury), he took part in the Battle of Camperdown (11 Oct 1797). Wounded.
"Was captain of the Woolwich, 44, but broke by court martial at Jamaica, for thrashing some of the officers of the dockyard. Said to have been reinstated. A very droll fellow and great mimic. He was in the Dutch action under Duncan, and blown up; his face terribly scarred. Before that he was a very good-looking fellow. A native of Ireland, possessing great personal courage."—James Anthony Gardner (Recollections of James Anthony Gardner: Commander R.N. [1775–1814])