The Mother of All Discone Antennas
Stopped by the USS Iowa in the Port of Los Angeles a while back. Couldn't help but notice this behemoth on the bow. Think your neighbors are annoyed now, try putting this on your roof. You can learn more about the Iowa's radio equipment on the Battleship Iowa Amateur Radio Association site. In all fairness though, they do get bigger... Check out the discone at the Titan Missile Museum.