"Orval Fairbairn" wrote in message
news
In article ,
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.

You roll inverted and look straight "up". ;)

Actually Orval, I've used this method on occasion :-)) This is the exact
procedure for a vertical show reversal using a Reverse half Cuban .
Dudley Henriques