the system will not give alarms for multiple 1200 codes in the same vicinity
that might conflict with each other
it will give an alarm for a discreet code conflicting with another discrete
code.. (0440 is not considered discrete)
It may or may not give alarms if a discrete code will conflict with a 1200
code

The jumpers at Jean have negotiated 1201, 1202, 1203 etc so TRACON instantly
knows it's the jump plane.

BT

"Eric Greenwell" wrote in message
news:Bj9ck.310$rb1.279@trndny08...
JS wrote:

Just installed and certified a transponder in the new flying
machine, too. But this is old technology. When we all have
transponders it will drive ATC crazy with gaggles of proximity alarms
going off.

That can be handled with an assigned code like the 0440 used in Reno for
gliders. The software can be instructed to ignore conflicts between 0440
codes, which, I believe, is what is done in Reno. There may be other
methods they can already use, especially if the glider density is lower
than Reno.

Be better if every aircraft had FLARM.

We will, in 10 to 20 years, but we'll likely call it ADSB. FLARM, as
presently implemented, probably wouldn't appeal to 250+ knot airliners,
because it's range is too small. I think it's better to work for a low
cost, low power, ADSB with modest features like the Mitre unit.

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* Updated! "Transponders in Sailplanes" http://tinyurl.com/y739x4
* New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org