When you look at the Iowa-class battleships, in a way, you are looking at the ultimate in a surface combat platform. They are huge – about 45,000 tons — they carry nine 16-inch guns and have an array of other weapons, too, from Tomahawk cruise missiles to Phalanx close-in weapon systems.
Looking at them, could you imagine diluting that surface-combat firepower for some Harriers? Well, the U.S. Navy did.
According to the 13th Edition of "The Naval Institute Guide to the Ships and Aircraft of the U.S. Fleet," the Navy kicked around the idea of turning the Iowa and her three sisters into a combination battleship-carrier. The after turret would be removed, and the space would be turned into a flight deck. WarisBoring.com noted that the plan called for as many as 20 AV-8B Harriers to be carried on the ship.
There was also a consideration for adding vertical launch systems for Tomahawks and Standard surface-to-air missiles.
It wasn't as if the battleships hadn't operated planes before, as in World War II the battleships operated floatplanes – usually for gunfire spotting. The Iowas kept their planes in an on-board hanger in the aft section of the ship.
That section was later used to land helicopters when they were in service during the 1980s. The New Jersey even operated a UCAV, the QH-50 Drone Anti-Submarine Helicopter, while blasting Viet Cong and North Vietnamese positions during her one deployment in the Vietnam War.
That said, the project never went forward. One big reason was at the end of the Cold War, the Iowa-class ships were quick to go on the chopping block — even as the USS Missouri and USS Wisconsin provided outstanding fire support to the Marines during Operation Desert Storm.
Another can be ascribed to history. Late in World War II, Japan was desperate for carriers. And when they tried to convert the battleships Ise and Hyuga to carrier, the effort wasn't successful.
It is open to debate whether 20 Harriers would have been a fair trade for a third of an Iowa's 16-inch firepower. What isn't open for debate is that the Iowa-class fast battleship has never truly been replaced a quarter-century after their decommissioning.