On Sun, 04 Mar 2007 20:24:09 +0100, Bear wrote in
:

S mode and TCAS do not solve the problem with fixed obstacle like a
cable or an antenna.

If S Mode beacons provide Lat., Lon., and Altitude data, it would seem
there may be sufficient information to deal with the issue of fixed
obstacle avoidance, provided, of course, that the obstacle database is
up to date and accurate.