 9-12 on the southern and eastern shores of the Russian Island; casemated tunnel cellars by the First River, an airfield by the Second River; many other ancillary facilities; and over of roads.Designers deliberately tried not to copy model projects and placed forts according to the mountainous terrain and kept gun emplacements dispersed over a large area, thus making it difficult for a potential enemy to sight their artillery.These bold departures from long-established theories of academic fortification, in connection with respect for the vagaries of extremely rough terrain, made for an original, and in most cases effective, example of the contemporary art of fortification.