On Sun, 18 May 2008 20:33:45 -0400, "Capt. Geoffrey Thorpe" The Sea
Hawk At Wow Way D0t C0m wrote in
:

"Larry Dighera" wrote in message
.. .
On Sun, 18 May 2008 14:30:55 -0400, Bob Noel
wrote in
:
...
I was flying a low-wing, and announced my position as over the
southern boundary of the field, and immediately subsequent a Cessna
reported being at the same position and altitude. I wanted to take
evasive action, but without the Cessna in sight, there was no good way
of knowing exactly what that might be. I announced again, and so did
the Cessna, but we did not sight each other. The atmosphere got more
tense as the moments ticked by, and I kept expecting the sounds of
impact at any second. I considered maneuvering again, but finally
decided, that currently I was okay, and doing nothing would likely not
change that.

http://wingsandwheels.com/page4.htm

That's an interesting device. I'm not sure it would have been too
useful in the case cited above. The vertical resolution isn't going
to be better than the +/- 100' of Mode C, and it's not clear that it
can resolve the lateral position of aircraft in close proximity; it
appears to just go into alarm when one gets closer that the preset
distance selected. It may have been useful when our two aircraft were
more distant and converging however. Thanks for the information.