Setting sail from his base at Litochoro, on the night of, Votsis led his vessel into the harbour of Thessaloniki, at the time still held by the Ottomans. Inside the harbour, which was protected by minefields and coastal batteries, lay a handful of Ottoman vessels: aside from four tugboats, the only warship was the old ironcladFeth-i Bülend. The ship had been disarmed and converted into a barracks ship, with its weaponry having been used to reinforce the coastal batteries. According to Votsis' own description, he evaded the searchlights of Karaburnu fortress which stood at the entrance of the harbour, and sighted the Feth-i Bülend at 23:20. Sailing closer and directly towards the unsuspecting vessel, he launched his starboard torpedo at 23:35 from a distance of 150 m, followed by the portside torpedo. As he turned his ship around, he also launched the deck-mounted torpedo, but it exploded on the quay. While the torpedoes struck the Feth-i Bülend, Votsis sailed out of the harbour at full speed, relying on his craft's shallow draught to pass over the minefield and sailed towards Greek-held territory. The Feth-i Bülend sank rapidly. Casualties however amounted to only seven men from its crew, as most were ashore manning the guns. The sinking of the Feth-i Bülend may not have had much military significance, but it provided a great morale boost to the Greeks: it was the first of a series of naval successes in the war, and the Hydriot Votsis was propelled to the status of a national hero, readily associated with the legendary fireship captains of the Greek Revolution.
Later career
Promoted to Lt. Commander, he was placed in command of the captured Ottoman torpedo boat Antalya, which was renamed to Nicopolis. In 1920, he was captain of the battleship Kilkis at anchor at Constantinople. On 27 January 1921, he was appointed as Greece's High Commissioner to the Allied mission at Constantinople, a post he held until 22 February 1922, when he was appointed captain of the battleship Lemnos, which he commanded until September 1922. Disagreeing with the revolt of the Army, led by Venizelist officers, against the royalist government, he resigned in October and went into retirement with the rank of Rear Admiral. From 1927 to his death in 1931 he was the president of the Greco-Albanian Association with Filippos Dragoumis, brother of Ion Dragoumis as secretary.
Honours
In 1934, a marble bust of Votsis was erected at Thessaloniki, in front of the White Tower.
A La Combattante IIa-class fast attack craft, the Ypoploiarchos Votsis has been named after him.
