ʻO ka hōʻailona ʻana i nā hale i ʻoi aku ma mua o 150 mika, e like me nā turbines makani, nā masts transmission, nā chimneys, broadcast masts, etc. ʻO kā mākou mau kukui ikaika kiʻekiʻe he mau ʻāpana kū hoʻokahi a hāʻawi i nā hiʻohiʻona kūʻokoʻa e like me ka nānā ʻana i ka hewa i hoʻohui ʻia, photocell, GPS synchronization etc.
(ʻAno A & B)