Dude, Iowa couldn't score any hits on a destroyer at 20miles. And if that is a poor comparison Iowa missed by like a lot. Yamato on the other hand scored a near miss and damaged white plains at 20miles. If it wasn't for the black smoke being emitted by a damaged boiler than she would have continued firing at white plains and possibly hit her.But how effective was Yamato's fire control radar?
During the Battle of Latte Gulf, USN Battleships ravaged the IJN's warships with accurate radar directed gunfire.