When I had a transponder equipped aircraft I upgraded it to Mode C and it was always on when I flew. That was a while ago and I've since flown non-transponder equipped aircraft and not seen a difference in terms of traffic avoidance. I agree with IO540 that if there is to be compulsory use of transponders, why not use existing, proven and relatively cheap Mode C for day only VFR aircraft as it gives ATC all the info required from a VFR pilot. Unless the Mode S is going to provide me with a basic TCAS system cheaply then it is of absolutely no advantage to me compared to Mode C but I'm the poor Joe who has to pay for the installation.......
I will never have a need for weather updates to a Garmin 430 cos I'll never fit one to my aeroplane. TAF's and METAR's are quite sufficient to keep me on the ground if required. A chart and uploads from NavPro to my Pilot III keep me out of areas where I shouldn't be.
Finally, as the airfield I operate from is slap bang under LTN approach, my transponder probably would not be turned on until clear of the zone as it would be setting off easyJet and Monarch TCAS's left right and centre. Bit of a waste of money there then........
Last edited by LowNSlow; 1st February 2004 at 14:11.