A discussion of the United States' remarkable feats and services that, in vividness and historical sense, measures up to Billings' splendid book about the TVA- All Down the Valley, published by Viking last year. Approaching his topic informally, the author answers questions a landsman would naturally ask. First, what is the North Atlantic like and why did we wait so long to build a Superliner? With interest definitely roused he enumerates and illuminates the liner's basic characteristics- its structure, its ""seakindliness"", its purpose as an immediately available troop transport in war, its many functions during a typical voyage and so forth. For the classroom, the nautical layman or a bon voyage gift- a fascinating profile of a great ship.