Austrian navy building more patrol vessels according to the Dutch magazine Marineblad dated 1907-1908 No. 11

An item referred to the German magazine Marine-Rundschau reporting that the Austrian patrol vessels ‘E’ en ‘F’ were nearly completed. Built by Yarrow, England was their displacement 10 ton, 3 petrol engines with a total horsepower of 300 hp and a maximum speed of 24 miles. The patrol vessels ‘C’ and ‘D’ were still to be designed.