harakka is located near the coast of helsinki, south of kaivopuisto. in the years before first world war the island had three batteries with five model 1867 guns, four 6 inch 190 pood guns and two 57 mm quick-firing guns. as the war began the 6 inch guns were relocated to the land front while the 9 inch guns were decommissioned and left in their positions. the two 57 mm guns and two more guns from vallisaari were relocated to a new field fortified battery on the southern tip of the island. additionally the island had 2-4 antiaircraft guns of 75 mm or during the war. the island had also a 110 cm searchlight.