Styling aside, doing the basic math — 282 feet, six decks, 12 guests — yields well over 100 feet of deck length per guest. It’s more complicated than that, of course, what with crew, machinery and service spaces, but it is obvious, as Lürssen says, that the guests have a lot of space at their disposal. This is more than a function of Quattroelle’s length overall. As yachts grow longer, they also grow wider and higher, and they must be built stronger and carry more power, equipment, supplies and complement. Remarkably, the interior volume, the displacement and tonnage, the crew requirements and even the price have traditionally increased at an exponential rate that remains fairly constant over a wide range of sizes. Let’s call it “the power of 2.6.” What this means is that when comparing two yachts, such as Quattroelle, at 282 feet, with the owner’s previous Lürssen, at 197 feet, you can get some idea of the comparison by taking the ratio of the lengths and raising it to an exponential power of 2.6. I’ll save you the trouble of doing the math (282 / 197 = 1.43, and 1.43 ^ 2.6 = 2.54 ). The bottom line is that Quattroelle is only 43 percent longer, but she’s more than 2½ times as “big” as the owner’s earlier Lürssen. That’s quite an upgrade for any owner, and it’s something to keep in mind as we mere mortals consider a comparable move, say from 30 feet to 43 feet — the math, the rewards and the consequences are the same.