1915 to 1918 - SVENT ISTVAN - Tegetthoff Class Dreadnought - 21689 tons - 152.2 x 28.0 - 1915 Ganz & Co., Fiume - 12x305mm, 12x150mm, 12x66mm, 4TT - 20 knots - based at Pula, she spent only 54 days at sea in her entire life. On June 8th, she and TEGETTHOFF left Pula as part of a squadron to attack Allied blockading forces. At about 3:15 am on June 10th, two Italian MAS boats, MAS 15 and MAS 21, spotted the smoke from the Austrian ships while returning from an uneventful patrol off the Dalmatian coast. Both boats successfully penetrated the escort screen and split to engage each of the dreadnoughts. MAS 21 attacked TEGETTHOFF, but her torpedoes failed to hit the ship. MAS 15 fired her two torpedoes successfully at 3:25 am at SZENT ISTVAN, hitting abreast her boiler rooms,the aft boiler room quickly flooding. SZENT ISTVAN steered for the nearby Bay of Brgulje at low speed but water continued to leak into the forward boiler room and eventually doused all but the two boilers on the port side. This killed the power for the pumps and only left enough electricity to run the lights. The turrets were trained to port in a pointless effort to counter the list and their ready ammunition was thrown overboard. An attempt by TEGETTHOFF to take the crippled battleship into tow was also abandoned after it became clear that SZENT ISTVAN was doomed. Flooding continued, and the ship capsized at 6:05 am off Premuda Island. Only 89 sailors died, the low death toll partly attributed to the fact that all sailors with the KuK Navy had to learn to swim before entering active service.