High Quality Content by WIKIPEDIA articles! The Ersatz Monarch-class (Replacement Monarch-class)battleship was a projected new class of four battleships which were to be constructed for the Austro-Hungarian Navy in 1914–1919. Designed to replace the Monarch class of coastal defense ships, each of the battleships were to carry ten 13.8-inch (350 mm) guns as their primary armament, a slight improvement over her predecessors, the Tegetthoff class. The ships were 574 feet (175 m) and were designed to displace 24,100 long tons (24,500 t; 27,000 ST).