SZENT ISTVÁN 13 Dec 1915
Towed from Fiume (the only Hungarian-built member of the class) to Pola for final construction work. Based at Pola.
12 Apr 1918 on exercise with Viribus Unitis. Left Pola 09 Jun 1918. Sunk 10 Jun 1918 off Premuda Island by Italian MAS 15 captained by Capitano di Fregeta Luigo Rizzo (see Wien).
Complement 1,000 Displacement 20,000t