Fly an ultralight with no floor, and look straight down.

Martha

"Mxsmanic" wrote in message
...
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.

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