On 11/2/2012 9:33 AM, Dave Nadler wrote:
- Mode S will not cause a bunch of gliders in a thermal
to become invisible to a TCAS-equipped approaching jet,
as can happen with Mode A/C,

Even though the TCAS function doesn't work, is the approaching jet made
aware there are transponders at that 2-D position, altitude unknown?

What happens when the jet approaches a Mode A equipped aircraft? Is the
pilot made aware of it, even though the TCAS system cannot give him
climb/dive command?

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)