Servicio militar
He was appointed as a Volunteer 1st Class RN in 1810 in H.M.S. Andaman.
He served as a Midshipman and Master's Mate in H.M.S. Pique and H.M.S. Glasgow, both commanded by Captain the Hon. Anthony Maitland. In the latter, he took part in the bombardment of Algiers on 27/08/1816.
He served in H.M.S. Queen Charlotte (100 guns), Smart passed for Lieutenant and then returned to H.M.S. Glasgow. Despite a surplus of officers, captains and admirals then had greater powers of selecting their officers than in recent years, when the principle of 'equality of opportunity has entailed strict Admiralty control, so the return of an officer to a senior he had served before (as Smart did more than once) indicated that he was considered efficient. In July 1820 Smart went to H.M.S. Scout (18 guns) as Acting Lieutenant RN.
He was commissioned as Lieutenant RN (With seniority dated 11/09/1820).
He served in H.M.S. Cambrian 1823 in the Mediterranean.
He served in H.M.S. Revenge, the flagship of Sir Harry Burrard Neale in 1825-26, and then in H.M.S. Ariadne.
He returned to the Cambrian in time to take part in the Battle of Navarino in October 1827. The ship was subsequently wrecked, after fouling the Isis coming out of Grabusa after an attack on a Greek pirate nest there.
He was appointed as a Commander RN on 28/04/1828.
He served in H.M.S. Satellite in 1832.
He went out to South America, where Smart captured two slavers, one with 577 slaves on board. For a few months he went to H.M.S. Blonde. Captain Francis Mason, but returned to H.M.S. Satellite.
He brought her home to pay off and was 'posted' on 10/01/1837.
He served in H.M.S. Impregnable (In command) After his four years in H.M.S. Collingwood, he was on half pay until 1854, when he became Captain Superintendent of Pembroke Dockyard.
He was appointed as a Rear-Admiral RN (With seniority dated 09/07/1857).
He was appointed as the Commander-in-Chief Channel Squadron 1861-63.
He was appointed as a Vice-Admiral RN in 12/1863 and was appointed as Commander-in-Chief Mediteranean until 1866, flying his flag in H.M.S. Victoria.
He was appointed as a Admiral RN i(With seniority dated 01/1869). (He retired in 1870.)