CAR carriers are the ugly sisters of the high seas. Even their owners would admit that, with their high freeboard, they are not beautiful. But they are very functional, designed for a specific purpose — to transport automobiles and trucks. When Japanese motor manufacturers decided to go global some 30 years ago, they needed a different type of ship to transport vehicles in large volumes. Until relatively recently, this was a fairly simple business, with two main trade lanes, from Japan to the US, and Japan to Europe. Since then it has become far more complicated. Like other sectors, it...