Mxsmanic wrote in
:

Judah writes:

You can use multiple points to determine your location with a fair
amount of precision, and you can estimate with a fair amount of
accuracy your distance from the landmarks.

Even as you are flying? There are a lot of airspaces to worry about.

Yes. When you are driving, how do you ensure that you are maintaining a
safe distance from the guardrail, or from the car in front of or next to
you? How about from a Stop Sign or Traffic Light?

Do you do this equally as well as you did the first time you got into a
car? Do you need a GPS to do this?

The same sort of judgement of distances is possible when piloting an
airplane. Someone who learns to fly in the real worlds learns to discern
three dimensions and estimate distance. Unfortunately, this cannot be
effectively done on a two-dimensional simulator screen.

Many places. By the time you've carefully calculated whether or not
you're in one of them, you're no longer there, but you've violated two
other airspaces. Even in small private planes, things move quickly.

Careful calculation is not required. And certainly there is no harm in
leaving yourself a bit of lattitude if you don't have tools to do it with
exacting precision.