In rec.aviation.soaring Larry Dighera wrote:
So if you see a glider in you path while piloting a powered aircraft,
but its pilot doesn't see you, you don't give it the right of way?

In my opinion, right of way is essentially useless when flying.

There are three relevant situations:

- You are on a collision course with another aircraft. You have the ROW.
- You are on a collision course with another aircraft. He has the ROW.
- You are on a collision course with another aircraft. Neither has the
ROW.

In all three situations the only reasonable thing to is the same: maneuver
to avoid by any means necessary.

Thus your inference is essentially backwards. Not only should the power
plane get out of the way of the glider, but the glider should get out of
the way of the power plane.

--
Michael Ash
Rogue Amoeba Software