Interesting thing with transponders

JS wrote:
Apparently two aircraft squawking VFR are visually reported as a
conflict but do not have the same level of alert.
Close to another aircraft could be:
On tow behind a transponder-equipped towplane.
Sharing a thermal.
Pair flying.
Not that gliders ever do any of that.
So as we're all moving toward using radios and transponders to keep
separation, be aware of the havoc we may be wreaking at ATC. Not a
good way to make friends! If you're Mode S, they have your
registration too!
No "havoc" is created by two transponders sqawking 1200 near each other.
It can cause signal scrambling problems so the Mode C altitude data is
not read reliably, but ATC still knows where you are! Mode S
transponders can alleviate this problem.

--
Eric Greenwell - Washington State, USA (netto to net to email me)

" No "havoc" is created by two transponders sqawking 1200 near each
other."

Tell that to the Dutch who fly in the Schiphol area...

On Mar 5, 10:04*pm, Hagbard Celine wrote:
" No "havoc" is created by two transponders sqawking 1200 near each
other."

Tell that to the Dutch who fly in the Schiphol area...

Shiphol had a problem with the back-end processing and display of Mode
S derived traffic data on their display screens. In hindsight this
seems an awfully obvious thing they missed with Mode S transponder
mandates.

Some summary to the problem is at

http://eurocontrol.int/msa/public/st...Procedure.html

Transponders provide visibility for gliders to both ATC and airliner/
fast jets TCAS and are therefore a critical item anywhere we are
mixing those types of aircraft. And I fail to see how a particular
display capacity/planning problem at Shiphol is that relevant to any
general idea of carriage of transponders.

Darryl