kuivasaari island is located west of isosaari. construction of a 6-inch canet battery was planned in spring 1914, but the guns were located in isosaari instead. after the war began construction of a 10-inch battery began on the western shore of the island. the guns, transported from vladivostok, were placed on their foundations in february 1915 and the battery was finished in early winter of 1915. the main fire control station of the fortress with the only rangefinder was located in kuivasaari. the island also had a 150 cm searchlight. kuivasaari telephone exchange was also the central gunnery telephone exchange. a four-gun 75 mm anti-aircraft battery on wooden platforms was located on the northern part of the island.