A complex formula is employed in which one plumb bob is hung from your nose, another is dangled from each of your ears. Preserve it, protect it, and always stand tall. So they say. I say that my airspace is a bundle of infinitely high vertical lines rising from every part of my body. That's why I sleep on my side, to present the smallest possible target.
Some people insist that for the sake of accuracy all measurements be made on the naked citizen.
Others, more demure, insist on full drapery. There are many such disputes to be settled. But even here there is discord. The latter view prevails in coastal areas, at the edge of the rich fishing banks and mineral reserves of the outer continental shelf. If you were about to grow wealthy on kelp or cod or manganese nodules, you too would seek to restrict overflights well beyond your layer of subcutaneous fat.