 The name ship of the Körös @-@ class river monitors was built for the Austro @-@ Hungarian Navy by H. Schönichen . She was laid down at Budapest on 30 March 1890 . Körös and her sister ship SMS Szamos doubled the size of Austria @-@ Hungary 's Danube Flotilla . The two monitors had an overall length of 54 m ( 177 ft 2 in ) , a beam of 9 m ( 29 ft 6 in ) , and a normal draught of 1 @.@ 2 m ( 3 ft 11 in ) . Her displacement was 448 tonnes ( 441 long tons ) , and her crew consisted of 77 officers and enlisted men . The ship was powered using steam generated by two Yarrow boilers driving two triple @-@ expansion steam engines , and carried 54 tonnes ( 53 long tons ) of coal . Her engines were rated at 1 @,@ 200 ihp ( 890 kW ) and she was designed to reach a top speed of 10 knots ( 19 km / h ; 12 mph ) . 
