Mxsmanic wrote:
How do you know when you are exactly overflying a specific spot on
the ground? It's it just a matter of knowing your particular
aircraft, or are there tricks that can help to determine this? I
know you can look off the tip of your wing to see if you're abeam
something (such as a runway), but how can you tell when you're right
over something? I presume there's no way to look straight down from
most aircraft, and it seems like the view over the nose is often
several miles away.

I know you aren't going to like this answer Anthony but it just isn't that
critical that you pass over a specific point. Close enough is good enough.

So how do you get close enough you ask. Let's say you are flying from A to C
you want to pass over B. As you are approaching B you notice that D is
pretty much perpendicular to your course in line with B. So you head towards
B and keep D the same distance away.

Now there are special situations like aerial mapping or non-guided munitions
that will require better positioning but in those cases you would have
specialized equipment.