The SMS Szent István ('Saint Stephen') was built just before the outbreak of World War I, as the only dreadnought type battleship built in the Hungarian part of Austria-Hungary. The ship spent almost the entire war at anchor in Pola harbour, leaving port only for gunnery training. Its first and final mission began on 9 June, 1918, when it was ordered to participate in an attack on the Otranto Barrage, which was blocking the Central powers' forces in the Adriatic Sea from access to the Mediterranean.

While Szent István, along with its half-sister ship SMS Tegetthoff and a small escort, was en route to a rendezvous point north of Dubrovnik, the vessel was spotted by two Italian torpedo boats. The Italian MAS-15 quickly launched an attack on Szent István, hitting her boiler rooms with two torpedoes. While the Austro-Hungarian ship tried to make it back to the coast, it slowly flooded and while sailing in the vicinity of the Croatian island of Premuda, it became clear that the ship was doomed. The final moments of Szent István, during which 89 sailors lost their lives, were captured on film by the crew of Tegetthoff.

The SMS Szent István was the only World War I battleship whose sinking was filmed.

Yard: Ganz & Co., Fiume

Navy: Austro-Hungarian Navy

Class: Tegetthoff-class battleship

Armament: 4 x 305 mm guns, 12 x 150 mm guns, 12 x 66 mm guns, 3 x 66 mm anti-aircraft guns, 4 x 533 mm torpedo-tubes

Wikimedia Commons

The SMS Szent István, sometime between 1914 and 1918.

Shipwreck

The wreck of the Szent István was discovered in the mid-1970's by the navy of former Yugoslavia near the island of Premuda, and is the largest shipwreck in the Adriatic. The Szent István was found lying at a depth of around 68 meters, with her keel pointing to the surface, and has been the subject of many research expeditions since. As a monument of historic technology, the site has been placed under the protection of the Croatian Ministry of Culture, and access to it is restricted.

UNESCO

The wreck of the SMS Szent Istvan.

International Center for Underwater Archaeology, Zadar

Divers inspect the damage caused by one of the torpedo strikes to the ship.

viribusunitis.ca

Still of a 3d image of the SMS Szent István created by Andrew W. Wilke.

• Wikipedia article on the SMS Szent István.
• PDF file on underwater cultural heritage in Croatia, International Center for Underwater Archaeology in Zadar.
• UNESCO article with reference to the SMS Szent István.
• Andrew A. Wilke.
  Viribus Unitis.