The Interdiction Assault Ship (IAS) was an aircraft cruiser conversion project in 1980 for the Iowa-class battleships that would have removed the aft main gun turret. This would free up space for a V-shaped ramped flight deck (the base of the V would have been on the ship's stern, while each leg of the V would extend forward, so that planes taking off would fly past the ship's exhaust stacks and conning tower), while a new hangar would be added with two elevators, which would support up to twelve Boeing AV-8B Harrier II jump-jets. These aviation facilities could also support helicopters, SEAL teams and up to 500 Marines for an air assault. In the empty space between the V flight deck would be up to 320 missile silos accommodating a mixture of Tomahawk land attack missiles, ASROC anti-subma