melkki is located south of lauttasaari. construction of a 6-inch canet battery and 11 inch model 1877 battery began in may 1914, but the work was halted after the war began. the canet battery was relocated to harmaja, and the 11 inch guns were used only for a short period on temporary wooden platforms. a 75 mm anti-aircraft battery was located on the island in october 1914. in summer 1916 the guns were removed and the island was turned over for use as part of the naval base harbour facilities with machine shops and a naval mine depot.