Allen ) wrote:

I would guess the aircraft you are receiving the info from would have to
have mode S.

Well, I have only had the unit since July, so I suppose it is possible
that I have yet to look at the screen at the moment a mode S transponder
passed by.

But, the chances should have been pretty good that during the last eight
times through NY class B airspace I would have seen one mode S return,
no?

--
Peter