I don't take it as gospel. But if you do it several times, you'll see several different ranges. Get a few of those ranges, and see where they fall in general. It's not perfect, but it's close enough. (And if you're counting on the navigator's report to get back home with half a gallon of diesel in the tank, you're probably not going to make it.)
__________________
"Never ask a World War II history buff for a 'final solution' to your problem!"
|